1 EXHIBIT 10.2 Supplemental Agreement No. 20 to Purchase Agreement No. 1405 between The Boeing Company and SOUTHWEST AIRLINES CO. Relating to Boeing Model 737 Aircraft THIS SUPPLEMENTAL AGREEMENT, entered into as of the 29th day of September 1995, by and between THE BOEING COMPANY, a Delaware corporation (hereinafter called Boeing), and SOUTHWEST AIRLINES CO., a Texas corporation with its principal office in the City of Dallas, State of Texas, (hereinafter called Buyer); W I T N E S S E T H: WHEREAS, the parties hereto entered into that certain Purchase Agreement No. 1405, dated July 23, 1987, relating to the purchase and sale of certain Boeing Model 737 aircraft (the "Aircraft"), which agreement, as amended, together with all exhibits and specifications attached thereto and made a part thereof, is hereinafter called the "Purchase Agreement;" and WHEREAS, Buyer has agreed to excercise the option to purchase three (3) additional Option Aircraft delivering in April 1997 offered pursuant to Letter Agreement No. 1405-6R3; NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree as follows: 1. Article 1, entitled "Subject Matter of Sale" is deleted in its entirety and replaced by the following new Article 1: ARTICLE 1. Subject Matter of Sale. Subject to the provisions of this Agreement, Boeing shall sell and deliver to Buyer, and Buyer shall purchase from Boeing eighteen (18) Boeing Model 737-5H4 aircraft (hereinafter sometimes referred to as the "Block A and Block B" Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-38500-3 (which includes CFM International, Inc. CFM56-3-B1 engines), dated July 23, 1987 (as described in Exhibit A attached to the Purchase Agreement), twenty-three (23) Boeing Model 737-3H4 Aircraft (hereinafter sometimes referred to as the Block C-1 and Block D-1 Substitute Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. T (which includes CFM International, Inc. P.A. No. 1405 S20-1 2 CFM56-3-B1 engines), dated September 19, 1989 (as described in Exhibit A-1 attached to the Purchase Agreement), seven (7) Boeing Model 737-5H4 aircraft (hereinafter sometimes referred to as the "Block C Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-38500-3 (which includes CFM International, Inc. CFM56-3-B1 engines), dated June 7, 1989, thirty-four (34) Model 737-3H4 aircraft (hereinafter referred to as the "Block E Aircraft" to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. W (which includes CFM International, Inc. CFM56-3-B1 engines) dated May 22, 1992, (as described in Exhibit A-2 attached to the Purchase Agreement), three (3) Model 737-3H4 aircraft (hereinafter referred to as the "Block F Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. X (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 26, 1993, (as described in Exhibit A-3 attached to the Purchase Agreement), twelve (12) Model 737-3H4 aircraft (hereinafter referred to as the "Block G Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. Z (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 15, 1994 (as further described in Exhibit A-4 attached to the Purchase Agreement), four (4) Model 737-3H4 aircraft (hereinafter referred to as the "Block H Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. Z (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 15, 1994 (as further described in Exhibit A-5 attached to the Purchase Agreement), five (5) Model 737-3H4 aircraft (hereinafter referred to as the "Block I Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. AA (which includes CFM International, Inc. CFM56-3-B1 engines) dated May 11, 1994 as further described in Exhibit A-6 attached to the Purchase Agreement and three (3) Model 737-3H4 aircraft (hereinafter referred to as the "Block J Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. AC (which includes CFM International, Inc. CFM56-3-B1 engines) dated June 21, 1995 as further described in Exhibit A-7 attached to the Purchase Agreement and as such Detail Specifications may be modified from time to time in accordance with the terms and conditions of Article 7 herein. Such Detail Specifications as so modified are by this reference incorporated in this Agreement and are hereinafter referred to as the "Detail Specification." In connection with the sale and purchase of the Aircraft, Boeing shall also deliver to Buyer such other things as may be required by this Agreement including data, documents, training and services. All Block A, Block B, Block C, Block C-1 Substitute, Block D-1 Substitute, Block E, Block F, Block G, Block H, Block I and Block J Aircraft are referred to individually and collectively as the "Aircraft" or "AIRCRAFT." 2. Article 2.1, entitled "Time of Delivery" is deleted in its entirety and replaced by the following new Article 2.1 which adds the Block J Aircraft: 2.1 Time of Delivery. Each Aircraft shall be delivered to Buyer assembled and ready for flight, and Buyer shall accept delivery of such Aircraft, during the months set forth in the following schedule or such earlier months as mutually agreed between Boeing and Buyer: Month and Year of Delivery Quantity of Aircraft -------------- -------------------- Block A ------- February 1990 One (1) March 1990 Two (2) April 1990 Two (2) P.A. No. 1405 S20-2 3 May 1990 One (1) August 1990 Two (2) September 1990 Two (2) May 1991 Two (2) September 1991 One (1) Block B ------- February 1991 One (1) May 1991 Two (2) September 1991 Two (2) Block C ------- February 1992 Three (3) May 1992 Four (4) Block C-1 Substitute Aircraft ------------------- June 1992 Two (2) July 1992 One (1) February 1993 Three (3) May 1993 Four (4) August 1993 Two (2) September 1993 One (1) Block D-1 Substitute Aircraft ------------------- February 1994 Three (3) May 1994 Four (4) September 1994 Three (3) Block F Aircraft ---------------- July 1994 Two (2) September 1994 One (1) Block E Aircraft ---------------- November 1994 Two (2) March 1995 One (1) April 1995 Two (2) May 1995 Two (2) September 1995 Two (2) October 1995 Three (3) March 1996 Two (2) April 1996 Three (3) May 1996 Two (2) July 1996 Two (2) August 1996 One (1) September 1996 Two (2) January 1997 Four (4) P.A. No. 1405 S20-3 4 June 1997 Four (4) August 1997 Two (2) Block G Aircraft ---------------- July 1995 Two (2) August 1995 Two (2) September 1995 Two (2) January 1996 Three (3) March 1996 One (1) June 1996 Two (2) Block H Aircraft ---------------- February 1995 Four (4) Block I Aircraft ---------------- July 1995 One (1) October 1995 Two (2) November 1995 Two (2) Block J Aircraft ---------------- April 1997 Three (3) 3. Article 3.1, entitled "Basic Price" is deleted in its entirety and replaced by the following new Article 3.1 which adds the Basic Price for the Block J Aircraft: 3.1 Basic Price. The basic price of each Aircraft shall be equal to the sum of (i) Twenty Million Five Hundred Seventy-Three Thousand One Hundred Twenty-Six Dollars ($20,573,126) for the Block A and Block B Aircraft, Twenty Million, Six Hundred Three Thousand, Seven Hundred Twenty-Six Dollars ($20,603,726) for the Block C Aircraft, Twenty-Three Million Seven Hundred Forty-One Thousand Eight Hundred Seventy-Six Dollars ($23,741,876) for the Block C-1 Substitute Aircraft, Twenty-Three Million, Eight Hundred Eighty Thousand One Hundred Seventy-Six Dollars ($23,880,176) for the Block D-1 Substitute Aircraft, Twenty-Nine Million Five Hundred Seventy-Three Thousand One Hundred Seventy-Eight Dollars ($29,573,178) for the Block E Aircraft, Thirty Million Three Hundred Three Thousand Six Hundred Seventy-Eight Dollars ($30,303,678) for the Block F Aircraft, Thirty-One Million Six Hundred Twenty-Eight Thousand Eight Hundred Sixty-Six Dollars ($31,628,866) for the Block G Aircraft, Thirty-One Million Six Hundred Twenty One Thousand Seven Hundred Sixty Six Dollars ($31,621,766) for the Block H Aircraft, Thirty-Two Million Sixty-Five Thousand Four Hundred Fifty Eight Dollars ($32,065,458) for the Block I Aircraft and Thirty-Two Million One Hundred Sixteen Thousand Eight Hundred Fifty Eight Dollars ($32,116,858) for the Block J Aircraft and (ii) such price adjustments applicable to such Aircraft as may be made pursuant to the provisions of this Agreement, including Article 7 (changes to Detail Specification) and Article 8 (FAA Requirements) or other written agreements executed by Buyer and Boeing. 5. Article 5.1, entitled "Advance Payment Base Price" is revised by deleting the Advance Payment Base Price for the January, June and August 1997 Block E P.A. No. 1405 S20-4 5 Aircraft and inserting new Advance Payment Base Prices due to escalation sharing and inserting after the Block I Aircraft the following: Block E Aircraft ---------------- "January 1997 $35,630,000 June 1997 $35,687,000 August 1997 $35,771,000" Block J Aircraft ---------------- Month and Year of Advance Payment Base Scheduled Delivery Price per Aircraft ------------------ -------------------- April 1997 $35,662,000 6. Article 5.2, entitled "Advance Payment Schedule" is revised by inserting after the Block I Aircraft the following schedule for the Block J Aircraft: Amount Due per Aircraft Block J Aircraft Due Date of Payment April 1997 - ------------------- ---------- Deposit $200,000 Upon execution of 10% (less the Supplemental Deposit) Agreement No. 20 18 months prior to the 5% first day of the scheduled delivery month of the Aircraft 12 months prior to the first 5% day of the scheduled delivery month of the Aircraft 9 months prior to the first 5% day of the scheduled delivery month of the Aircraft 6 months prior to the first 5% day of the scheduled delivery month of the Aircraft -------------------------------- Total 30% 7. The title and the first sentence in Article 7.3.2 is revised to be written as "The Block E, F, G, H, I and J Aircraft." 8. A new Exhibit A-7, entitled "Aircraft Configuration - the Block J Aircraft," attached hereto, is incorporated into the Purchase Agreement by this reference. P.A. No. 1405 S20-5 6 9. Exhibit D-4, entitled "Airframe and Engine Price Adjustment - the Block I Aircraft" is revised in the title of page one by inserting the words "and J". 10. Letter Agreement No. 1405-6R3 entitled "Option Aircraft" is revised in Article 1, paragraph 1.1, Article 2, paragraph 2.2, Attachment A, Article 2, paragraph 2.1 and Attachment B, paragraph b, page 2 by deleting reference to the three (3) April 1997 Option Aircraft. 11. * 12. * 13. Boeing and Buyer agree that the provisions of Letter Agreement No. 6-1162-STE-1363, dated July 23, 1987, shall apply to paragraph 11 and 12 of this Supplemental Agreement. The Purchase Agreement shall be deemed to be supplemented to the extent herein provided and as so supplemented shall continue in full force and effect. EXECUTED IN DUPLICATE as of the day and year first above written. THE BOEING COMPANY SOUTHWEST AIRLINES CO. By: /s/ R. Leo Lyons By: /s/ Gary A. Barron ---------------------------- -------------------------------- Its: Attorney-In-Fact Its: Executive Vice President and --------------------------- ------------------------------- Chief Operating Officer ------------------------------- * Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission. P.A. No. 1405 S20-6 7 EXHIBIT A-7 to PURCHASE AGREEMENT NO. 1405 Dated _________________ between THE BOEING COMPANY and SOUTHWEST AIRLINES CO. AIRCRAFT CONFIGURATION BLOCK J AIRCRAFT MODEL 737-3H4 The Detail Specification, referred to in Article 1 of the Purchase Agreement, is Boeing Detail Specification D6-76300-2 Revision AC dated June 21, 1995 as amended to incorporate the applicable specification language to reflect the effect of the changes set forth in the Master Changes listed below, including the effects of such changes on Manufacturer's Empty Weight (MEW) and Operating Empty Weight (OEW). As soon as practicable, Boeing will furnish to Buyer copies of the Detail Specification, which copies will reflect the effect of such changes. The Aircraft Basic Price reflects and includes all effects of such changes of price. A-7-1 8 Exhibit A-7 Page 2 2002MP3024 N/C INSTALL PROGRAM PIN BURNDY BLOCKS NON EFIS AIRCRAFT A-7-2 9 Supplemental Agreement No. 21 to Purchase Agreement No. 1405 between The Boeing Company and SOUTHWEST AIRLINES CO. Relating to Boeing Model 737 Aircraft THIS SUPPLEMENTAL AGREEMENT, entered into as of the 19th day of December, 1995, by and between THE BOEING COMPANY, a Delaware corporation (hereinafter called Boeing), and SOUTHWEST AIRLINES CO., a Texas corporation with its principal office in the City of Dallas, State of Texas, (hereinafter called Buyer); W I T N E S S E T H: WHEREAS, the parties hereto entered into that certain Purchase Agreement No. 1405, dated July 23, 1987, relating to the purchase and sale of certain Boeing Model 737 aircraft (the "Aircraft"), which agreement, as amended, together with all exhibits and specifications attached thereto and made a part thereof, is hereinafter called the "Purchase Agreement;" and WHEREAS, Buyer has agreed to exercise the option to purchase four (4) additional Option Aircraft delivering in August 1997 (quantity 2) and September 1997 (quantity 2) offered pursuant to Letter Agreement No. 1405-6R3; NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree as follows: 1. Article 1, entitled "Subject Matter of Sale" is deleted in its entirety and replaced by the following new Article 1: ARTICLE 1. Subject Matter of Sale. ARTICLE 1. Subject Matter of Sale. Subject to the provisions of this Agreement, Boeing shall sell and deliver to Buyer, and Buyer shall purchase from Boeing eighteen (18) Boeing Model 737-5H4 aircraft (hereinafter sometimes referred to as the "Block A and Block B" Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-38500-3 (which includes CFM International, Inc. CFM56-3-B1 engines), dated July 23, 1987 (as described in Exhibit A attached to the Purchase Agreement), twenty-three (23) Boeing Model 737-3H4 Aircraft (hereinafter sometimes referred to as the Block C-1 P.A. No. 1405 S21-1 10 and Block D-1 Substitute Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. T (which includes CFM International, Inc. CFM56-3-B1 engines), dated September 19, 1989 (as described in Exhibit A-1 attached to the Purchase Agreement), seven (7) Boeing Model 737-5H4 aircraft (hereinafter sometimes referred to as the "Block C Aircraft) to be manufactured by Boeing in accordance with Boeing Detail Specification D6-38500-3 (which includes CFM International, Inc. CFM56-3-B1 engines), dated June 7, 1989, thirty-four (34) Model 737-3H4 aircraft (hereinafter referred to as the "Block E Aircraft" to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. W (which includes CFM International, Inc. CFM56-3-B1 engines) dated May 22, 1992, (as described in Exhibit A-2 attached to the Purchase Agreement), three (3) Model 737-3H4 aircraft (hereinafter referred to as the "Block F Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. X (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 26, 1993, (as described in Exhibit A-3 attached to the Purchase Agreement), twelve (12) Model 737-3H4 aircraft (hereinafter referred to as the "Block G Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. Z (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 15, 1994 (as further described in Exhibit A-4 attached to the Purchase Agreement), four (4) Model 737-3H4 aircraft (hereinafter referred to as the "Block H Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. Z (which includes CFM International, Inc. CFM56-3-B1 engines) dated February 15, 1994 (as further described in Exhibit A-5 attached to the Purchase Agreement), five (5) Model 737-3H4 aircraft (hereinafter referred to as the "Block I Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. AA (which includes CFM International, Inc. CFM56-3-B1 engines) dated May 11, 1994 as further described in Exhibit A-6 attached to the Purchase Agreement, three (3) Model 737-3H4 aircraft (hereinafter referred to as the "Block J Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. AC (which includes CFM International, Inc. CFM56- 3-B1 engines) dated July 21, 1995 as further described in Exhibit A-7 attached to the Purchase Agreement and four (4) Model 737-3H4 aircraft (hereinafter referred to as the "Block K Aircraft") to be manufactured by Boeing in accordance with Boeing Detail Specification D6-76300-2 Rev. AC (which includes CFM International, Inc. CFM56-3-B1 engines) dated July 21, 1995 as further described in Exhibit A-8 attached to the Purchase Agreement and as such Detail Specifications may be modified from time to time in accordance with the terms and conditions of Article 7 herein. Such Detail Specifications as so modified are by this reference incorporated in this Agreement and are hereinafter referred to as the "Detail Specification." In connection with the sale and purchase of the Aircraft, Boeing shall also deliver to Buyer such other things as may be required by this Agreement including data, documents, training and services. All Block A, Block B, Block C, Block C-1 Substitute, Block D-1 Substitute, Block E, Block F, Block G, Block H, Block I, Block J, and Block K Aircraft are referred to individually and collectively as the "Aircraft" or "AIRCRAFT." 2. Article 2.1, entitled "Time of Delivery" is deleted in its entirety and replaced by the following new Article 2.1 which adds the Block K Aircraft: 2.1 Time of Delivery. Each Aircraft shall be delivered to Buyer assembled and ready for flight, and Buyer shall accept delivery of such Aircraft, during the months set forth in the following schedule or such earlier months as mutually agreed between Boeing and Buyer: P.A. No. 1405 S21-2 11 Month and Year of Delivery Quantity of Aircraft -------------- -------------------- Block A ------- February 1990 One (1) March 1990 Two (2) April 1990 Two (2) May 1990 One (1) August 1990 Two (2) September 1990 Two (2) May 1991 Two (2) September 1991 One (1) Block B ------- February 1991 One (1) May 1991 Two (2) September 1991 Two (2) Block C ------- February 1992 Three(3) May 1992 Four (4) Block C-1 Substitute Aircraft ------------------- June 1992 Two (2) July 1992 One (1) February 1993 Three(3) May 1993 Four (4) August 1993 Two (2) September 1993 One (1) Block D-1 Substitute Aircraft ------------------- February 1994 Three(3) May 1994 Four (4) September 1994 Three(3) Block F Aircraft ---------------- July 1994 Two (2) September 1994 One (1) Block E Aircraft ---------------- November 1994 Two (2) March 1995 One (1) April 1995 Two (2) May 1995 Two (2) September 1995 Two (2) P.A. No. 1405 S21-3 12 October 1995 Three(3) March 1996 Two (2) April 1996 Three(3) May 1996 Two (2) July 1996 Two (2) August 1996 One (1) September 1996 Two (2) January 1997 Four (4) June 1997 Four (4) August 1997 Two (2) Block G Aircraft ---------------- July 1995 Two (2) August 1995 Two (2) September 1995 Two (2) January 1996 Three(3) March 1996 One (1) June 1996 Two (2) Block H Aircraft ---------------- February 1995 Four (4) Block I Aircraft ---------------- July 1995 One (1) October 1995 Two (2) November 1995 Two (2) Block J Aircraft ---------------- April 1997 Three(3) Block K Aircraft ---------------- August 1997 Two (2) September 1997 Two (2) 3. Article 3.1, entitled "Basic Price" is deleted in its entirety and replaced by the following new Article 3.1 which adds the Basic Price for the Block K Aircraft: 3.1 Basic Price. The basic price of each Aircraft shall be equal to the sum of (i) Twenty Million Five Hundred Seventy-Three Thousand One Hundred Twenty-Six Dollars ($20,573,126) for the Block A and Block B Aircraft, Twenty Million, Six Hundred Three Thousand, Seven Hundred Twenty-Six Dollars ($20,603,726) for the Block C Aircraft, Twenty-Three Million Seven Hundred Forty-One Thousand Eight Hundred Seventy-Six Dollars ($23,741,876) for the Block C-1 Substitute Aircraft, Twenty-Three Million, Eight Hundred Eighty Thousand One Hundred Seventy-Six Dollars ($23,880,176) for the Block D-1 Substitute Aircraft, Twenty-Nine Million Five Hundred Seventy-Three Thousand One Hundred Seventy-Eight Dollars ($29,573,178) for the Block E Aircraft, Thirty Million Three Hundred Three Thousand Six Hundred Seventy-Eight Dollars ($30,303,678) for the Block F Aircraft, Thirty-One Million Six P.A. No. 1405 S21-4 13 Hundred Twenty-Eight Thousand Eight Hundred Sixty-Six Dollars ($31,628,866) for the Block G Aircraft, Thirty-One Million Six Hundred Twenty One Thousand Seven Hundred Sixty Six Dollars ($31,621,766) for the Block H Aircraft, Thirty-Two Million Sixty-Five Thousand Four Hundred Fifty Eight Dollars ($32,065,458) for the Block I Aircraft and Thirty-Two Million One Hundred Sixteen Thousand Eight Hundred Fifty Eight Dollars ($32,116,858) for the Block J Aircraft and Thirty-Two Million One Hundred Seventy Nine Thousand Seven Hundred Fifty Eight Dollars ($32,179,758) for the Block K Aircraft and (ii) such price adjustments applicable to such Aircraft as may be made pursuant to the provisions of this Agreement, including Article 7 (changes to Detail Specification) and Article 8 (FAA Requirements) or other written agreements executed by Buyer and Boeing. 4. Article 5.1, entitled "Advance Payment Base Price" is revised by inserting after the Block J Aircraft the following schedule for the Block K Aircraft: Block K Aircraft ---------------- "August 1997 $35,865,000 September 1997 $35,913,000 5. Article 5.2, entitled "Advance Payment Schedule" is revised by inserting after the Block J Aircraft the following schedule for the Block K Aircraft: Amt Due per A/C Amt due per A/C Block K A/C Block K A/C Due Date of Payment August 1997 September 1997 - ------------------- ----------- -------------- Deposit $130,000 $200,000 Upon execution of 10% (less 10% (less Supplemental the Deposit) the Deposit) Agreement No. 21 18 months prior to the 5% 5% first day of the scheduled delivery month of the Aircraft 12 months prior to the 5% 5% first day of the scheduled delivery month of the Aircraft 9 months prior to the 5% 5% first day of the scheduled delivery month of the Aircraft 6 months prior to the 5% 5% first day of the scheduled delivery month of the Aircraft ------------------------------------ Total 30% 30% 6. The title and the first sentence in Article 7.3.2 is revised to be written as "The Block E, F, G, H, I, J and K Aircraft." P.A. No. 1405 S21-5 14 7. A new Exhibit A-8, entitled "Aircraft Configuration - the Block K Aircraft," attached hereto, is incorporated into the Purchase Agreement by this reference. 8. Exhibit D-4, entitled "Airframe and Engine Price Adjustment - the Block I and J Aircraft" is revised in the title of page one by deleting the word "and" between the letters I and K and inserting "and K" after the letter J and before the word Aircraft. 9. Letter Agreement No. 1405-6R3 entitled "Option Aircraft" is revised in Article 1, paragraph 1.1, Article 2, paragraph 2.2, Attachment A, Article 2, paragraph 2.1 and Attachment B, paragraph b, page 2 by deleting reference to the two (2) August 1997 and two (2) September 1997 Option Aircraft. 10. * 11. * 12. Boeing and Buyer agree that the provisions of Letter Agreement No. 6-1162-STE-1363, dated July 23, 1987, shall apply to paragraph 11 and 12 of this Supplemental Agreement. 13. It is recognized by the parties that a strike was commenced against Boeing on October 6, 1995 by its principal employee union. It is not presently known whether such strike will have any effect upon Boeing's proposed undertaking set forth herein. The parties agree that any delay in the performance of any obligation of Boeing under this supplemental agreement, as a result of such strike, will be deemed an excusable delay and subject to the excusable delay provisions of the Purchase Agreement. The Purchase Agreement shall be deemed to be supplemented to the extent herein provided and as so supplemented shall continue in full force and effect. EXECUTED IN DUPLICATE as of the day and year first above written. THE BOEING COMPANY SOUTHWEST AIRLINES CO. By: /s/ R. Leo Lyons By: /s/ Gary A. Barron ------------------------------- ---------------------------------- Its: Attorney-In-Fact Its: Executive Vice President and Chief ------------------------------- ---------------------------------- Operating Officer ---------------------------------- * Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission. P.A. No. 1405 S21-6 15 EXHIBIT A-8 to PURCHASE AGREEMENT NO. 1405 Dated________________ between THE BOEING COMPANY and SOUTHWEST AIRLINES CO. AIRCRAFT CONFIGURATION BLOCK K AIRCRAFT MODEL 737-3H4 The Detail Specification, referred to in Article 1 of the Purchase Agreement, is Boeing Detail Specification D6-76300-2 Revision AC dated July 21, 1995 as amended to incorporate the applicable specification language to reflect the effect of the changes set forth in the Master Changes listed below, including the effects of such changes on Manufacturer's Empty Weight (MEW) and Operating Empty Weight (OEW). As soon as practicable, Boeing will furnish to Buyer copies of the Detail Specification, which copies will reflect the effect of such changes. The Aircraft Basic Price reflects and includes all effects of such changes of price. A-8-1 16 1110MP3333 N/C EXTERIOR DECORATIVE PAINT REVISION WHITE IN LIEU OF EXISTING 2002MP3024 N/C INSTALL PROGRAM PIN BURNDY BLOCKS NON EFIS AIRCRAFT 2524MP3465 N/C INSTALLATION OF TEDLAR/NOMEX PANEL IN LIEU OF LEATHER 3040MP3047 N/C INSTALL A 4 UNIT WINDOW HEAT CONTROL SYSTEM OLIN 231-2 IN LIEU OF 1231-1 3040MP3052 ($1,800) INSTALL A BFE WINDOW HEAT CONTROL SYSTEM WHICH CONTAINS BITE-OLIN 231-3 IN LIEU OF 231-2 3435MP3032 $1,400 HUD INSTALLATION REVISION - INCORPORATION OF INTENT OF FLIGHT DYNAMICS SERVICE BULLETIN 3446MP3147 N/C GPWC REVISION - BANK ANGLE CALLOUT DELETE A-8-2