1 EXHIBIT 10.4 PURCHASE AGREEMENT NUMBER 2025 between THE BOEING COMPANY and DELTA AIR LINES, INC. Relating to Boeing Model 767-432ER Aircraft P.A. No. 2025 2 TABLE OF CONTENTS SA ARTICLES NUMBER - -------- ------ 1. Quantity, Model and Description 2. Delivery Schedule 3. Price 4. Payment 5. Miscellaneous TABLE - ----- 1. Aircraft Information Table 2. Option Aircraft Information Table 3. * EXHIBIT - ------- A. Aircraft Configuration SUPPLEMENTAL EXHIBITS - --------------------- BFE/CDSPE/SPE/CSE. Buyer Furnished Equipment, Customer Directed Seller Purchased Equipment, Seller Purchased Equipment and Cabin Systems Equipment Variables CS1. Customer Support Variables EE1. Engine Escalation * SLP1. Service Life Policy Components *This confidential information has been omitted and filed separately with the Commission. i P.A. No. 2025 3 LETTER AGREEMENTS 6-1162-RLL-2198 Delivery Price Adjustment 6-1162-RLL-2234 Special Matters 6-1162-RLL-2241 Promotion Support 6-1162-RLL-2242 1997&1998 Escalation Sharing 6-1162-RLL-2243 * 6-1162-RLL-2244 Performance Retention Commitment 6-1162-RLL-2245 Certain Contractual Matters 6-1162-RLL-2247 * 6-1162-RLL-2251 Total Cost Team 6-1162-RLL-2275 Multiple Aircraft Operating Weights 6-1162-RLL-2281 Aircraft Performance Guarantees 6-1162-RLL-2284 Open Configuration Matters 6-1162-RLL-2287 Certification Flight Test Aircraft 6-1162-RLL-2289 * 6-1162-RLL-2290 * 6-1162-RLL-2292 * 6-1162-RLL-2420 767-400ER Pilot Type Rating 6-1162-RLL-2424R1 Engine Matters *This confidential information has been omitted and filed separately with the Commission. ii P.A. No. 2025 4 Purchase Agreement No. 2025 between The Boeing Company and DELTA AIR LINES, INC. ------------------------------ This Purchase Agreement No. 2025 dated as of October 21, 1997 between The Boeing Company (Boeing) and DELTA AIR LINES, INC. (Customer) relating to the purchase and sale of Model 767-432ER aircraft incorporates the terms and conditions of the Aircraft General Terms Agreement dated as of October 21, 1997 between the parties, identified as AGTA-DAL (AGTA). Article 1. Quantity, Model and Description. The aircraft to be delivered to Customer will be designated as Model 767-432ER aircraft (the Aircraft). Boeing will manufacture and sell to Customer Twenty-One (21) Aircraft to conform to the configuration described in Exhibit A, which is part of this Purchase Agreement. Article 2. Delivery Schedule. The scheduled months of delivery of the Aircraft are listed in the attached Table 1, which is part of this Purchase Agreement. Article 3. Price. 3.1 Aircraft Basic Price. The Aircraft Basic Price for each Aircraft is subject to escalation, as listed in Table 1. 3.2 Advance Payment Base Prices. The Advance Payment Base Price and the Advance Payment Schedule for each Aircraft is listed in Table 1. Article 4. Payment. Advance Payments and payments at Delivery by Customer will be in accordance with Article 2 of the AGTA. 1 P.A. No. 2025 5 Article 5. Miscellaneous. 5.1 Aircraft Information Table. Table 1 consolidates information contained in Articles 1, 2, 3 and 4 with respect to (i) quantity of Aircraft, (ii) applicable Detail Specification, (iii) month and year of scheduled deliveries, (iv) Aircraft Basic Price, (v) applicable escalation factors and (vi) Advance Payment Base Prices and advance payments and their schedules. 5.2 Buyer Furnished Equipment Variables. Supplemental Exhibit BFE/CDSPE/SPE/CSE contains vendor selection dates, on dock dates and other variables applicable to the Aircraft. 5.3 Customer Support Variables. Supplemental Exhibit CS1 contains the variable information applicable to information, training services and other things furnished by Boeing in support of the Aircraft. 5.4 Engine Escalation Variables. Supplemental Exhibit EE1 contains the applicable engine escalation formula. 5.5 *This confidential information has been omitted and filed separately with the Commission. 5.6 Service Life Policy Component Variables. Supplemental Exhibit SLP1 lists the airframe and landing gear components covered by the Service Life Policy for the Aircraft. 2 P.A. No. 2025 6 5.7 Negotiated Agreement; Entire Agreement. This Purchase Agreement, including the provisions of Article 11.2 of the AGTA relating to insurance, and Article 12 of Part 2 of Exhibit C of the AGTA relating to DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES, has been the subject of discussion and negotiation and is understood by the parties; the Aircraft Price and other agreements of the parties stated in this Purchase Agreement were arrived at in consideration of such provisions. This Purchase Agreement, including the AGTA, contains the entire agreement between the parties and supersedes all previous proposals, understandings, commitments or representations whatsoever, oral or written, and may be changed only in writing signed by authorized representatives of the parties. * * * * * * * * * * * * * * * * DATED AS OF October 21, 1997 DELTA AIR LINES, INC. THE BOEING COMPANY By /s/ Leo F. Mullin By /s/ R.B. Woodard ------------------ ---------------- Its President and CEO Its President 3 P.A. No. 2025 7 TABLE 1 TO PURCHASE AGREEMENT NO. 2025 AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS AIRFRAME MODEL/MTGW: 767-432ER * DETAIL SPECIFICATION: D019T001-A(2/7/97) ENGINE MODEL/THRUST LEVEL: CF6-80C2B7F * PRICE BASE YEAR: * AIRFRAME BASE PRICE: * OPTIONAL FEATURES: * AIRFRAME ESCALATION DATA: ------------------------- SUB-TOTAL OF AIRFRAME AND FEATURES: * BASE YEAR INDEX (ECI): * ENGINE PRICE (PER AIRCRAFT): * BASE YEAR INDEX (ICI): * BUYER FURNISHED EQUIPMENT (BFE) ESTIMATE: * SELLER PURCHASED EQUIPMENT (SPE) ESTIMATE: * ENGINE ESCALATION DATA: ----------------------- AIRCRAFT BASIC PRICE (EXCLUDING BFE/SPE): * BASE YEAR INDEX (CPI): * REFUNDABLE DEPOSIT PER AIRCRAFT AT PROPOSAL ACCEPTANCE: * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * - --------------------------------------------------------------------------------------------------------------------------------- DELIVERY O NUMBER OF * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- DATE P AIRCRAFT * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- 2000 - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * - --------------------------------------------------------------------------------------------------------------------------------- 2001 - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 1 8 TABLE 1 TO PURCHASE AGREEMENT NO. 2025 AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS - --------------------------------------------------------------------------------------------------------------------------------- * * * * * - --------------------------------------------------------------------------------------------------------------------------------- DELIVERY O NUMBER OF * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- DATE P AIRCRAFT * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- ANNUAL - --------------------------------------------------------------------------------------------------------------------------------- 2000 * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- 2001 * * * * * * * * * - --------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 2 9 TABLE 2 TO THE AGTA AND PURCHASE AGREEMENT NO. 2025 767-432ER OPTION AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS AIRFRAME MODEL/MTGW: 767-432ER * DETAIL SPECIFICATION: D019T001-A(2/7/97) ENGINE MODEL/THRUST LEVEL: CF6-80C2B7F * PRICE BASE YEAR: * AIRFRAME PRICE: * OPTIONAL FEATURES: * AIRFRAME ESCALATION DATA: ------------------------- SUB-TOTAL OF AIRFRAME AND FEATURES: * BASE YEAR INDEX (ECI): * ENGINE PRICE (PER AIRCRAFT): * BASE YEAR INDEX (ICI): * BUYER FURNISHED EQUIPMENT (BFE) ESTIMATE: * SELLER PURCHASED EQUIPMENT (SPE) ESTIMATE: * ENGINE ESCALATION DATA: ----------------------- AIRCRAFT BASIC PRICE (EXCLUDING BFE/SPE): * BASE YEAR INDEX (CPI): * NON-REFUNDABLE DEPOSIT PER AIRCRAFT AT DEFINITIVE AGREEMENT: * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * - ------------------------------------------------------------------------------------------------------------------------------- DELIVERY NUMBER OF * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- DATE AIRCRAFT * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 1 P.A. No. 2025 10 TABLE 2 TO THE AGTA AND PURCHASE AGREEMENT NO. 2025 767-432ER OPTION AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS - -------------------------------------------------------------------------------------------------------------------------------- * * * * * - -------------------------------------------------------------------------------------------------------------------------------- DELIVERY NUMBER OF * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- DATE AIRCRAFT * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - -------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 2 P.A. No. 2025 11 TABLE 2 TO THE AGTA AND PURCHASE AGREEMENT NO. 2025 767-432ER ROLLING OPTION AIRCRAFT DELIVERY - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ 2005 2006 2007 2008 2009 - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ * * * * * - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ * * * * * - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ 2010 2011 2012 2013 2014 - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ * * * * * - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ * * * * * - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ - ------------------------- ------------------------ ------------------------ ------------------------- ------------------------ 2015 2016 2017 - ------------------------- ------------------------ ------------------------ * * * - ------------------------- ------------------------ ------------------------ * * - ------------------------- ------------------------ ------------------------ - ------------------------- ------------------------ ------------------------ *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 12 TABLE 3 TO THE AGTA PURCHASE AGREEMENT NO. 2025 * AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS AIRFRAME MODEL/MTGW: 767-432ER * DETAIL SPECIFICATION: D019T001-A(2/7/97) ENGINE MODEL/THRUST LEVEL: CF6-80C2B7F * PRICE BASE YEAR: * AIRFRAME PRICE: * OPTIONAL FEATURES: * AIRFRAME ESCALATION DATA: ------------------------ SUB-TOTAL OF AIRFRAME AND FEATURES: * BASE YEAR INDEX (ECI): * ENGINE PRICE (PER AIRCRAFT): * BASE YEAR INDEX (ICI): * BUYER FURNISHED EQUIPMENT (BFE) ESTIMATE: * SELLER PURCHASED EQUIPMENT (SPE) ESTIMATE: * ENGINE ESCALATION DATA: ---------------------- AIRCRAFT BASIC PRICE (EXCLUDING BFE/SPE): * BASE YEAR INDEX (CPI): * REFUNDABLE DEPOSIT PER AIRCRAFT AT PROPOSAL ACCEPTANCE: * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- DELIVERY O NUMBER OF * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- DATE P AIRCRAFT * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- 2000 - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------- 2001 - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 1 13 TABLE 3 TO THE AGTA PURCHASE AGREEMENT NO. 2025 * AIRCRAFT DELIVERY, DESCRIPTION, PRICE AND ADVANCE PAYMENTS - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- DELIVERY O NUMBER OF * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- DATE P AIRCRAFT * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- * * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------- ANNUAL - ----------------------------------------------------------------------------------------------------------------------------------- 2000 * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- 2001 * * * * * * * * * - ----------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------- *This confidential information has been omitted and filed separately with the Commission. Page 2 14 AIRCRAFT CONFIGURATION between THE BOEING COMPANY and DELTA AIR LINES, INC. Exhibit A to Purchase Agreement Number 2025 A P.A. No. 2025 15 Exhibit A to Purchase Agreement No. 2025 Page 1 AIRCRAFT CONFIGURATION Dated October 21,1997 relating to BOEING MODEL 767-432ER AIRCRAFT The Detail Specification is Boeing Document D019T001DAL64P-1, dated as of even date herewith. Such Detail Specification will be comprised of Configuration Specification D019T001, dated February 7, 1997, revised to Revision A, dated June 6, 1997, as amended to incorporate the Optional Features selected in accordance with Letter Agreement No. 6-1162-RLL-2284, including the effects on Manufacturer's Empty Weight (MEW) and Operating Empty Weight (OEW). Such Optional Features are set forth in Boeing Document D019TCR1DAL64P-1. Following completion of the configuration, Boeing will furnish to Customer copies of the Detail Specification, which copies will reflect such Optional Features. The Aircraft Basic Price reflects and includes an estimate of such Optional Features, except such Aircraft Basic Price does not include the price effects of any Buyer Furnished Equipment or Seller Purchased Equipment. A-1 P.A. No. 2025 16 BUYER FURNISHED EQUIPMENT, CUSTOMER DIRECTED SELLER PURCHASED EQUIPMENT, SELLER PURCHASED EQUIPMENT AND CABIN SYSTEMS EQUIPMENT VARIABLES relating to BOEING MODEL 767-432ER AIRCRAFT between THE BOEING COMPANY and DELTA AIR LINES, INC. Supplemental Exhibit BFE/CDSPE/SPE/CSE to Purchase Agreement Number 2025 P.A. No. 2025 17 This Supplemental Exhibit BFE/CDSPE/SPE/CSE contains supplier selection dates, on-dock dates and terms and conditions for Buyer Furnished Equipment, Customer Directed Seller Purchased Equipment, Seller Purchased Equipment and Cabin Systems Equipment and other variables applicable to the Aircraft. 1. Definition of Terms: Buyer Furnished Equipment (BFE) is defined as equipment purchased and provided by Customer, which Boeing will receive, inspect, store and install in the Aircraft before Delivery in accordance with this Supplemental Exhibit BFE/CDSPE/SPE/CSE. Seller Purchased Equipment (SPE) is Buyer Furnished Equipment (BFE) that Boeing purchases for Customer. Customer Directed Seller Purchased Equipment (CDSPE) is SPE for which Customer is to solicit proposals from suppliers, select the supplier, and negotiate commercial terms. Developmental Buyer Furnished Equipment (DBFE) is BFE not previously certified for installation on the same model aircraft. References to SPE in this letter will be inclusive of CDSPE unless otherwise specified. This Exhibit does not include developmental avionics. Inflight entertainment, cabin communications systems and cabin management systems (IFE/CCS/CMS) are collectively referred to as Cabin Systems Equipment (CSE). 2. BFE Variables: 2.1 Supplier Selection. Customer will: 2.1.1 Select and notify Boeing of the suppliers of the following BFE items by the following dates: Galley System June 2, 1998 Seats (passenger) February 2, 1998 IFE/CMS February 2, 1998 Page 1 P.A. No. 2025 18 2.2 On-dock Dates. On or before August 31, 1999, Boeing will provide to Customer a BFE Requirements On-Dock/Inventory Document (BFE Document) or an electronically transmitted BFE Report which may be periodically revised, setting forth the items, quantities, on-dock dates and shipping instructions relating to the in-sequence installation of BFE. For planning purposes, a preliminary BFE on-dock schedule is set forth in Attachment A. 3.0 SPE Variables: 3.1 Customer has requested that Boeing purchase as SPE the BFE which has been changed to SPE by Optional Feature Number TBD. Accordingly, Articles 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, and 4.8 below are applicable to SPE. *This confidential information has been omitted and filed separately with the Commission. 3.2 Price Effect of SPE on Aircraft Price and Advance Payments. 3.2.1 Advance Payments. Upon completion of the conversion from BFE to SPE, the Advance Payment Base Prices in Tables 1 and 3 will be updated to reflect the conversion from BFE to SPE. For Customer's planning purposes the estimated price of this SPE for each of the Aircraft is *This confidential information has been omitted and filed separately with the Commission. 3.2.2 Aircraft Price. The Aircraft Price will be adjusted to reflect (i) the actual costs charged Boeing by the SPE suppliers, and (ii) transportation charges. 3.3 Responsibilities for SPE. 3.3.1 Customer is responsible for: (i) selecting the supplier on or before: for galleys - June 2, 1998 (ii) selecting a FAA certifiable part; and (iii) providing to Boeing the SPE part specification/Customer requirements. (iv) providing notice to CDSPE supplier that the Boeing purchase order terms and conditions will apply. Page 2 P.A. No. 2025 19 (v) advising CDSPE suppliers to provide part number pricing, as agreed to between supplier and Customer to Boeing in a timely manner to support lead times and purchase order placement by Boeing. (vi) obtaining the supplier's warranty and agreement to provide customer support commitments for the CDSPE in accordance with paragraph 3.5 of Exhibit A of the AGTA. CDSPE is deemed BFE for the purposes of Exhibit B and C of the AGTA. (vii) advising Boeing which commodities will be SPE and which will be CDSPE on or before TBD. 3.3.2 Boeing is responsible for: (i) placing and managing the purchase order with the supplier; (ii) coordinating with the suppliers on technical issues; (iii) ensuring that the delivered SPE complies with the part specification; (iv) obtaining certification of the Aircraft with the SPE installed; and (v) for SPE other than CDSPE, obtaining for Customer the supplier's standard warranty for the SPE. SPE is deemed to be BFE for purposes of Exhibit B and C of the AGTA. 3.4 Supplier/Equipment Selection for SPE. 3.4.1 In addition to those responsibilities described above, for galleys the following provisions apply with respect to Customer's selection of suppliers: Galley Requirements. Customer will provide Boeing the definitive galley configuration requirements not later than March 2, 1998. Bidder's List. Suppliers for galleys are listed in Attachment B. Not later than sixty (60) days prior to the selection date shown above, Boeing will submit to Customer a list of offerable suppliers. Selection. If Customer does not make supplier selections by the dates specified in Article 3.3, paragraph 3.3.1 (i), or if Customer selects a galley supplier that is not on the Page 3 P.A. No. 2025 20 Boeing Bidder's list, such galley will become BFE and the provisions of Exhibit A, Buyer Furnished Equipment Provisions Document, of the AGTA will apply. 3.4.2 Boeing shall retain the right to approve Customer's selected supplier's and/or part numbers, for each item of SPE. 3.5 Changes to SPE. After the Purchase Agreement is signed, changes to SPE may only be made by and between Boeing and the suppliers. Customer's contacts with SPE suppliers relating to design (including selection of materials and colors), weights, prices or schedules are for informational purposes only. If Customer wants any changes made, requests must be made directly to Boeing for coordination with the supplier. 3.6 Proprietary Rights for SPE. Boeing's obligation to purchase SPE will not impose upon Boeing any obligation to compensate Customer or any supplier for any proprietary rights Customer may have in the design of the SPE. 3.7 Remedies for SPE. If Customer does not comply with the obligations above, Boeing may: (i) delay delivery of the Aircraft; (ii) deliver the Aircraft without installing the SPE; (iii) substitute a comparable part and invoice Customer for the cost; (iv) increase the Aircraft Price by the amount of Boeing's additional costs attributable to such noncompliance. 4.0 CSE Variables. Customer has requested that Boeing install in the Aircraft the CSE described in Attachment C to this Exhibit. Accordingly, Articles 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7 and 4.8 below are applicable to CSE. Because of the complexity of the IFE/CCS, special attention and additional resources will be required during the development, integration, certification, and manufacture of the Aircraft to achieve proper operation of the IFE/CCS at the time of delivery of the Aircraft. To assist Customer, Boeing will perform the functions of project manager (the Project Manager) as set forth in Attachment D and according to the requirements of Exhibit C to the AGTA. Page 4 P.A. No. 2025 21 4.1 Responsibilities for CSE. 4.2.1 Customer will: 4.2.1.1 Provide Customer's CSE system requirements to Boeing; 4.2.1.2 Select the CSE suppliers (Suppliers) from among those suppliers identified in the Change Requests listed in Attachment C to this Exhibit, on or before February 2, 1998. 4.2.1.3 Promptly after selecting Suppliers, participate with Boeing in meetings with Suppliers to ensure that Supplier's functional system specifications meet Customer's and Boeing's respective requirements; 4.2.1.4 Select Supplier part numbers and provide to Boeing by February 2, 1998. 4.2.1.5 Negotiate and obtain agreements on product assurance, product support following Aircraft delivery (including spares support), supplier's pricing and any other special business arrangements directly with Suppliers; 4.2.1.6 Provide pricing information for part numbers selected above to Boeing by March 13, 1998. 4.2.1.7 Negotiate and obtain agreements with any required service providers. 4.2.1.8 Include in Customer's contract with any seat supplier a condition obligating such seat supplier to enter into and comply with a Boeing approved bonded stores agreement. This bonded stores agreement will set forth the procedures concerning the use, handling and storage for the Boeing owned CSE equipment during the time such equipment is under the seat supplier's control. 4.2.1.9 Authorize Boeing to obtain production CSE spares for test and or rejection replacement as follows: 5% overage for in-seat LCD monitors, in-seat cables, handsets, cord reels, and remote jacks; 15% overage for seat boxes; and, one each of the head-end equipment. Unused parts will be returned to the Customer with the aircraft delivery and any parts returned to the supplier for repair will be returned to the Customer, at no further cost, after aircraft delivery. 4.2.2 Boeing will: 4.2.2.1 Perform the Project Manager functions stated in Attachment D; Page 5 P.A. No. 2025 22 4.2.2.2 Provide Aircraft interface requirements to Suppliers as specified in Boeing Document D6-36440, Standard Cabin Systems Requirements Document (SCSRD) and as specified in Attachment B, paragraph 3 A Seat integration. 4.2.2.3 Assist Suppliers in the development of their CSE system specifications and approve such specifications; 4.2.2.4 Negotiate terms and conditions (except for price, product assurance, product support following Aircraft delivery and any other special business arrangements) and enter into contracts with Suppliers and manage such contracts for the CSE; 4.2.2.5 Coordinate the resolution of technical issues with Suppliers; 4.2.2.6 Ensure that at time of Aircraft delivery the CSE configuration and functionality meets the requirements of the Change Requests contained in Attachment C to this Exhibit as such Attachment C may be amended from time to time; and 4.2.2.7 Obtain FAA certification of the Aircraft with the IFE/CCS installed therein. 4.3 Software for CSE. CSE systems may contain software of the following two types. 4.3.1 Systems Software. The software required to operate and certify the CSE systems on the Aircraft is the Systems Software and is part of the CSE. 4.3.2 Customer's Software. The software accessible to the Aircraft passengers which controls Customer's specified optional features is Customer's Software and is not part of the CSE. 4.3.2.1 Customer is solely responsible for specifying Customer's Software functional and performance requirements and ensuring that Customer's Software meets such requirements. Customer and Customer's Software supplier will have total responsibility for the writing, certification, modification, revision, or correction of any of Customer's Software. Boeing will not perform the functions and obligations described in paragraph 4.2.2 above, nor the Project Manager's functions described in Attachment D, for Customer's Software. Page 6 P.A. No. 2025 23 4.3.2.2 The omission of any Customer's Software or the lack of any functionality of Customer's Software will not be a valid condition for Customer's rejection of the Aircraft at the time of Aircraft delivery. 4.3.2.3 Boeing has no obligation to approve any documentation to support Customer's Software certification. Boeing will only review and operate Customer's Software if in Boeing's reasonable opinion such review and operation is necessary to certify the CSE system on the Aircraft. 4.3.2.4 Boeing will not be responsible for obtaining FAA certification for Customer's Software. 4.4 Changes to CSE. 4.4.1 After Boeing and Supplier have entered into a contract for the purchase of the CSE, changes to such contract may only be made by Boeing. Any Customer request for changes to the CSE specification after the Boeing/Supplier contract has been signed must be made in writing directly to Boeing. Boeing shall respond to such request by Customer in a timely manner. If such change is technically feasible and Boeing has the resources and time to incorporate such change, then Boeing shall negotiate with the Supplier to incorporate such change into the contract for the CSE. Any Supplier price increase resulting from such a change will be negotiated between Customer and Supplier. 4.4.2 Boeing and Customer recognize that the developmental nature of the CSE may require changes to the CSE or the Aircraft in order to ensure (i) compatibility of the CSE with the Aircraft and all other Aircraft systems, and (ii) FAA certification of the Aircraft with the CSE installed therein. In such event Boeing will notify Customer and recommend to Customer the most practical means for incorporating any such change. If within 15 days after such notification Customer and Boeing through negotiations cannot mutually agree on the incorporation of any such change or alternate course of action, then the remedies available to Boeing in Article 15 shall apply. 4.4.3 The incorporation into the Aircraft of any mutually agreed change to the CSE may result in Boeing adjusting the price of the Change Request contained in Attachment C to this Letter Agreement. 4.4.4 Boeing's obligation to obtain FAA certification of the Aircraft with the CSE installed is limited to the CSE as described in Attachment C, as Attachment C may be amended from time to time. 4.4.5 Boeing shall notify Customer in a timely manner in the event of a default by a Supplier under the Supplier's contract with Boeing. Within 15 days of Customer's receipt of such notification, Boeing and Customer shall agree through negotiations on an alternative Supplier or other course of action. If Boeing and Customer Page 7 P.A. No. 2025 24 are unable to agree on an alternative Supplier or course of action within such time, the remedies available to Boeing in Article 4.6 shall apply. In the event of a BFE/SPE Seat Supplier default, Boeing and Customer mutually agree to the contingency plan described in Exhibit C. 4.5 Exhibits B and C to the AGTA for CSE. CSE is deemed to be BFE for the purposes of Exhibit B, Customer Support Document, and Exhibit C, the Product Assurance Document, of the AGTA. 4.6 Boeing's Remedies for CSE. If Customer does not comply with any of its obligations set forth herein, Boeing may: 4.6.1 delay delivery of the Aircraft pursuant to the provisions of Article 10, Excusable Delay, of the AGTA; 4.6.2 deliver the Aircraft without part or all of the CSE installed, or with part or all of the CSE inoperative; or 4.6.3 increase the Aircraft Price by the amount of Boeing's additional costs attributable to such noncompliance. 4.7 Price Effect of CSE on Aircraft Price and Advance Payments. 4.7.1 Advance Payments. An estimated CSE price will be included in the Aircraft Advance Payment Base Price for the purpose of establishing the advance payments for the Aircraft. The estimated price for the Boeing purchased CSE installed on each Aircraft by Change Requests identified in Attachment C is TBD Dollars expressed in 1995 dollars. 4.7.2 Aircraft Price. The Aircraft Price will include the actual CSE prices and any associated transportation costs charged Boeing by Suppliers. 4.8 Customer's Indemnification of Boeing for SPE and CSE. Customer will indemnify and hold harmless Boeing from and against all claims and liabilities, including costs and expenses (including attorneys' fees) incident thereto or incident to successfully establishing the right to indemnification, for injury to or death of any person or persons, including employees of Customer but not employees of Boeing, or for loss of or damage to any property, including Aircraft, arising out of or in any way connected with any nonconformance or defect in any SPE, CSE, or in the installation thereof or in the provision of services hereunder, and whether or not arising in tort or occasioned in whole or in part by the negligence of Boeing, whether active, passive or Page 8 P.A. No. 2025 25 imputed. This indemnity will not apply with respect to any nonconformance or defect caused solely by Boeing's installation of the CSE. Page 9 P.A. No. 2025 26 ATTACHMENT A PRELIMINARY ON-DOCK DATES Items Preliminary On-Dock Dates - ----- ------------------------- * * * * * * Seats * * Galleys * * Electronics * * Furnishings * * Items * - ----- * * * * * * Seats * * Galleys * * Electronics * * Furnishings * * * Early on dock dates are required to support instrumental flight test. Developmental Avionics will be determined at ITCM (Initial Technical Coordination Meeting). ** On dock date for those items required to support flight test. *THIS CONFIDENTIAL INFORMATION HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. Page 1 P.A. No. 2025 27 ATTACHMENT A PRELIMINARY ON-DOCK DATES CONTINUED Items Preliminary On-Dock Dates - ----- ------------------------- * Seats * Galleys * Electronics * Furnishings * *This confidential information has been omitted and filed separately with the Commission. Page 2 P.A. No. 2025 28 ATTACHMENT B GALLEY BIDDERS LIST TBD Page 1 P.A. No. 2025 29 ATTACHMENT C CABIN SYSTEMS EQUIPMENT The following Change Requests describe the items of equipment that under the terms and conditions of this Letter Agreement are considered to be CSE. Each such Change Request is fully described in the Change Request Document. Change Request Number and Title TBD Page 1 P.A. No. 2025 30 ATTACHMENT D PROJECT MANAGER This Attachment D describes the functions that Boeing will perform as Project Manager to support (i) the development and integration of the CSE and (ii) the FAA certification of the CSE when installed on the Aircraft. 1. Project Management Boeing will perform the following functions for the CSE. Boeing will have authority to make day-to-day management decisions, and decisions on technical details which in Boeing's reasonable opinion do not significantly affect form, fit, function, cost or aesthetics. Boeing will be responsible for: A. Managing the development of all program schedules; B. Evaluating and approving Supplier's program management and developmental plans; C. Defining program metrics and status requirements; D. Scheduling and conducting program status reviews; E. Scheduling and conducting design and schedule reviews with Customer and Suppliers; F. Monitoring compliance with schedules; G. Evaluating and approving any recovery plans or plan revisions which may be required of either Suppliers or Customer; H. Leading the development of a joint CSE project management plan (the Program Plan) and; I. Managing the joint development of the System Specification 2. System Integration Boeing's performance as Project Manager will include the functions of systems integrator (Systems Integrator). As Systems Integrator Boeing will perform the following functions: Page 1 P.A. No. 2025 31 A. As required, assist Suppliers in defining their system specifications for the CSE, approve such specifications and develop an overall system functional specification; B. Coordinate Boeing, Customer and Supplier teams to ensure sufficient Supplier and Supplier sub system testing and an overall cabin system acceptance test are included in the Program Plan; and C. Organize and conduct technical coordination meetings with Customer and Suppliers to review responsibilities, functionality, Aircraft installation requirements and overall program schedule, direction and progress. 3. Seat Integration A. Boeing will coordinate the interface requirements between seat suppliers and Suppliers. Interface requirements are defined in Boeing Document Nos. D6-36230, "Passenger Seat Design and Installation"; D6-36238, "Passenger Seat Structural Design and Interface Criteria"; D222W232, "Seat Wiring and Control Requirements"; and D222W013-4, "Seat Assembly Functional Test Plan". B. The Suppliers will be required to coordinate integration testing and provide seat assembly functional test procedures for seat electronic parts to seat suppliers and Boeing, as determined by Boeing. C. The Suppliers will assist the seat suppliers in the preparation of seat assembly functional test plans. Page 2 P.A. No. 2025 32 ATTACHMENT E 767-432ER CRITICAL PATH EVENTS The contingency plan is the alternate course of action which will be implemented if the critical decision date is not met or other course of action is not agreed to by Boeing and Customer. The critical impact events listed below are milestones which must be met by the BFE/SPE and CSE Suppliers to achieve the in-sequence installation of the CSE. The Required Due Dates in such tables are the dates on which Boeing begins to incur disruption costs. The Critical Decision Dates are the dates after which the critical impact event cannot be accomplished to maintain the delivery schedule and/or full system functionality. A meeting to discuss a recovery plan cost impact and/or an alternate course of action will be held within one week of knowledge of delinquency or impending delinquency. Critical Required Decision Contingency Event Due Date Date Plan - ----- -------- ---- ---- Approvable Seat-Abuse TBD TBD CSE inoperative Load Test Plan Submittal at Delivery CSE Test Hardware On- TBD TBD CSE inoperative Dock at Seat Supplier at Delivery Seat-Abuse Load TBD TBD CSE inoperative test conduct at Delivery Seat-Abuse Load Test TBD TBD CSE inoperative Report Submittal at Delivery CSE Production TBD TBD Assess additional out- Hardware On-Dock at of-sequence charges Seat Supplier for the consequent late seats Seats-On-Dock TBD TBD Assess additional (Complete and In-Seat out-of-sequence charges CSE Hardware Functionality Tested) at Boeing Zone CSE Production TBD TBD CSE inoperative Hardware On-Dock at Boeing at Delivery Head End CSE Production TBD TBD CSE inoperative Hardware On-Dock at at Delivery Boeing Page 1 P.A. No. 2025 33 Further Development of the contingency plan, including additional events, based upon customer's final selected configuration is required. The TBD schedules in this Exhibit will be added within two weeks of the Initial Technical Coordination Meeting (ITCM). Page 2 P.A. No. 2025 34 CUSTOMER SUPPORT VARIABLES between THE BOEING COMPANY and DELTA AIR LINES, INC. Supplemental Exhibit CS1 to Purchase Agreement Number 2025 CS1 P.A. No. 2025 35 CUSTOMER SUPPORT VARIABLES relating to BOEING MODEL 767-432ER AIRCRAFT Customer and Boeing will conduct planning conferences approximately 12 months prior to delivery of the first Aircraft, or as mutually agreed, in order to develop and schedule a customized Customer Support Program to be furnished by Boeing in support of the Aircraft. *This confidential information has been omitted and filed separately with the Commission. CS1-1 P.A. No. 2025 36 *This confidential information has been omitted and filed separately with the Commission. CS1-2 P.A. No. 2025 37 7. Technical Data, Documents and Manuals. 7.1 Revisions. Boeing will revise, as applicable, technical data and documents provided with previously delivered aircraft. 7.2 Manuals. Boeing will provide to Customer manuals as identified below , ninety (90) days prior to delivery of first Aircraft, except for the following manuals which will be provided at delivery of each Aircraft. Airplane Flight Manual Weight and Balance Manual (chapters 1 and 2) Operations Manual and Quick Reference Handbook Fault Reporting Manual Manuals are subject to revision based upon engineering and manufacturing changes not available at the time of delivery of Customer's first Aircraft. Boeing will provide manuals to Customer electronically as technology makes manuals accessible, and manuals are incorporated into Boeing Online Data System (BOLD). CS1-3 P.A. No. 2025 38 At Customer's request, the engine warranty portion of this Supplemental Exhibit EE1 has been deleted because the Customer intends to enter into a warranty agreement with GE. ENGINE ESCALATION between THE BOEING COMPANY and DELTA AIR LINES, INC. Supplemental Exhibit EE1 to Purchase Agreement Number 2025 EE1 P.A. No. 2025 39 ENGINE ESCALATION relating to BOEING MODEL 767-432ER AIRCRAFT 1. ENGINE ESCALATION. (a) The Aircraft Basic Price of each Aircraft set forth in Table 1 of the Purchase Agreement includes an aggregate price for CF6-80C2 engines and all accessories, equipment and parts provided by the engine manufacturer. The adjustment in Engine price applicable to each Aircraft (Engine Price Adjustment) will be determined at the time of Aircraft delivery in accordance with the following formula: Pe = (Pb x CPI ) - Pb CPIb where CPIb is the Base Year Index as set forth in Table 1 of the Purchase Agreement (b) The following definitions will apply herein: Pe = Engine Price Adjustment Pb = Engine Base Price (per Aircraft), as set forth in Table 1 of the Purchase Agreement. CPI is the Composite Price Index, a value determined using the Bureau of Labor Statistics, U.S. Department of Labor actual data in accordance with the formula below. The Index values utilized in the formula will be the numbers shown in the actual data for the ninth month prior to the month of scheduled Aircraft delivery or the ninth month prior to the Base Year Dollars month set forth in Table 1. CPI = L +C + M + E L = The Labor Index will be equal to the quotient of the value associated with the Aircraft Delivery Month divided by the value associated with the Base Year Dollar month in "Hourly Earnings of Aircraft Engines and Engine Parts Production Workers" SIC 3724, multiplied by 100 and then by 30%. EE1-1 P.A. No. 2025 40 C = The Industrial Commodities Index will be equal to 30% of the Producer Price Index for "all commodities other than Farm and Foods," Code 3-15 associated with the scheduled Aircraft delivery month. M = The Metals and Metal Products Index will be equal to 30% of the Producer Price Index for "Metals and Metal Products," Code 10 associated with the scheduled Aircraft delivery month. E = The Fuel Index will be equal to 10% of the Producer Price Index for "Fuel and Related Products and Power," Code 5 associated with the scheduled Aircraft delivery month. The Engine Price Adjustment will not be made if it would result in a decrease in the Engine Base Price. (c) The values of the Average Hourly Earnings and Producer Price Indices used will be those published as of a date 30 days prior to the scheduled Aircraft delivery to Customer. Such values will be considered final and no Engine Price Adjustment will be made after Aircraft delivery for any subsequent changes in published Index values. (d) In the event the Engine price escalation provisions are made non-enforceable or otherwise rendered null and void by any agency of the United States Government, or if the U.S. Department of Labor, Bureau of Labor Statistics (i) substantially revises the methodology (in contrast to benchmark adjustments or other corrections of previously published data) or (ii) discontinues publication of any of the data referred to above, General Electric Company (GE) agrees to meet jointly with Boeing and Customer, (to the extent such parties may lawfully do so,) to jointly select a substitute for the revised or discontinued data; such substitute data to lead in application to the same adjustment result, insofar as possible, as would have been achieved by continuing the use of the original data as it may have fluctuated had it not been revised or discontinued. If such Engine price escalation provisions, methodology or data publication are subsequently reinstated, Boeing will make adjustments consistent with the agreements defined in this Supplemental Exhibit EE1. NOTE: The factor (CPI divided by the base year index) by which the Engine Base Price is to be multiplied will be expressed as a decimal and rounded to the nearest thousandth. Any rounding of a number, as required under this Supplemental Exhibit EE1 with respect to escalation of the Engine price, will be accomplished as follows: if the first digit of the portion to be dropped from the number to be rounded is five or greater, the preceding digit will be raised to the next higher number. EE1-2 P.A. No. 2025 41 * between THE BOEING COMPANY and DELTA AIR LINES, INC. Supplemental Exhibit * to Purchase Agreement Number 2025 *This confidential information has been omitted and filed separately with the Commission. * P.A. No. 2025 42 * relating to BOEING MODEL 767-432ER *This confidential information has been omitted and filed separately with the Commission. * P.A. No. 2025 43 SERVICE LIFE POLICY COMPONENTS between THE BOEING COMPANY and DELTA AIR LINES, INC. Supplemental Exhibit SLP1 to Purchase Agreement Number 2025 SLP1 P.A. No. 2025 44 COVERED SERVICE LIFE COMPONENTS relating to BOEING MODEL 767 AIRCRAFT This is the listing of Covered Components for the Aircraft which relate to Part 3, Boeing Service Life Policy of Exhibit C, Product Assurance Document to the AGTA and is a part of Purchase Agreement No. 2025. 1. Wing. (a) Upper and lower wing skins and stiffeners between the forward and rear wing spars. (b) Wing spar webs, chords and stiffeners. (c) Inspar wing ribs. (d) Inspar splice plates and fittings. (e) Main landing gear support structure. (f) Wing center section lower beams, spanwise beams and floor beams, but not the seat tracks attached to the beams. (g) Wing-to-body structural attachments. (h) Engine strut support fittings attached directly to wing primary structure. (i) Support structure in the wing for spoilers and spoiler actuators; for aileron hinges and reaction links; and for leading edge devices and trailing edge flaps. (j) Leading edge device and trailing edge flap support system. (k) Aileron, leading edge device and trailing edge flap internal, fixed attachment and actuator support structure. 2. Body. (a) External surface skins and doublers, longitudinal stiffeners, longerons and circumferential rings and frames between the forward SLP1-1 P.A. No. 2025 45 pressure bulkhead and the vertical stabilizer rear spar bulkhead, and structural support and enclosure for the APU but excluding all system components and related installation and connecting devices, insulation, lining, and decorative panels and related installation and connecting devices. (b) Window and windshield structure but excluding the windows and windshields. (c) Fixed attachment structure of the passenger doors, cargo doors and emergency exits excluding door mechanisms and movable hinge components. Sills and frames around the body openings for the passenger doors, cargo doors and emergency exits, excluding scuff plates and pressure seals. (d) Nose wheel well structure, including the wheel well walls, pressure deck, forward and aft bulkheads, and the gear support structure. (e) Main gear wheel well structure including pressure deck, bulkheads and landing gear beam support structure. (f) Floor beams and support posts in the control cab and passenger cabin area, but excluding seat tracks. (g) Forward and aft pressure bulkheads. (h) Keel structure between the wing front spar bulkhead and the main gear wheel well aft bulkhead, including splices. (i) Wing front and rear spar support bulkheads, and vertical and horizontal stabilizer front and rear spar support bulkheads including terminal fittings but excluding all system components and related installation and connecting devices, insulation, lining, and decorative panels and related installation and connecting devices. (j) Support structure in the body for the stabilizer pivot and stabilizer screw. 3. Vertical Stabilizer. (a) External skins between front and rear spars including splices. (b) Front, rear and auxiliary spar chords, webs and stiffeners, and attachment fittings between vertical stabilizer and body. SLP1-2 P.A. No. 2025 46 (c) Inspar ribs. (d) Support structure in the vertical stabilizer for rudder hinges, reaction links and actuators. (e) Rudder internal, fixed attachment and actuator support structure. (f) Rudder hinges and supporting ribs, excluding bearings. 4. Horizontal Stabilizer. (a) External skins between front and rear spars. (b) Front, rear and auxiliary spar chords, webs and stiffeners. (c) Inspar ribs. (d) Stabilizer center section and fittings splicing to outboard stabilizer including pivot and screw support structure. (e) Support structure in the horizontal stabilizer for the elevator hinges, reaction links and actuators. (f) Elevator internal, fixed attachment and actuator support structure. 5. Engine Strut. (a) Strut external surface skin and doublers and stiffeners. (b) Internal strut chords, frames and bulkheads. (c) Strut to wing fittings and diagonal brace. (d) Engine mount support fittings attached directly to strut structure. (e) For Aircraft equipped with General Electric or Pratt & Whitney engines only, the engine mounted support fittings. 6. Main Landing Gear. (a) Outer cylinder. (b) Inner cylinder. (c) Upper and lower side strut, including spindles and universals. (d) Upper and lower drag strut, including spindles and universals. SLP1-3 P.A. No. 2025 47 (e) Orifice support tube. (f) Downlock links, including spindles and universals (g) Torsion links. (h) Bogie beam. (i) Axles. 7. Nose Landing Gear. (a) Outer cylinder. (b) Inner cylinder, including axles. (c) Orifice support tube. (d) Upper and lower drag strut, including lock links. (e) Steering plates and steering collar. (f) Torsion links. (g) Actuator support beam and hanger. NOTE: The Service Life Policy does not cover any bearings, bolts, bushings, clamps, brackets, actuating mechanisms or latching mechanisms used in or on the Covered Components. SLP1-4 P.A. No. 2025