ThisTHIRTEENTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of March 29, 2019, is entered into by and among among Esterline Technologies Corporation, a Delaware corporation, Souriau USA, Inc., a Delaware corporation, Esterline International Company, a Delaware corporation, Leach Holding Corporation, a Delaware corporation, Leach International Corporation, a Delaware corporation, Leach Technology Group, Inc., a Delaware corporation, TA Aerospace Co., a California corporation, Esterline US LLC, a Delaware Limited Liability Company, CMC Electronics Aurora LLC, a Delaware Limited Liability Company, Advanced Input Devices, Inc., a Delaware corporation, Esterline Europe Company LLC, a Delaware Limited Liability Company, Esterline Georgia US LLC, a Delaware Limited Liability Company, Esterline Federal LLC, a Delaware Limited Liability Company, Angus Electronics Co., a Delaware corporation, Avista Incorporated, a Wisconsin corporation, Esterline Sensors Services Americas, Inc., a Delaware corporation, Esterline Technologies SGIP LLC, a Delaware Limited Liability Company, Hytek Finishes Co., a Delaware corporation, Janco Corporation, a California corporation, Mason Electric Co., a Delaware corporation, NMC Group Inc., a California corporation, Norwich Aero Products, Inc., a New York corporation, Palomar Products, Inc., a Delaware corporation, 17111 Waterview Pkwy LLC, a Delaware Limited Liability Company, Korry Electronics Co., a Delaware corporation, Memtron Technologies Co., a Delaware corporation, Sunbank Family of Companies LLC, a California Limited Liability Company, Joslyn Sunbank Company, LLC, a California Limited Liability Company, Armtec Defense Products Co., a Delaware corporation, Armtec Countermeasures Co., a Delaware corporation, Armtec Countermeasures TNO Co., a Delaware corporation, Racal Acoustics, Inc., a Delaware corporation, and Gamesman Inc., a Nevada corporation (collectively, the “Guaranteeing Subsidiaries”), TransDigm Inc., a Delaware corporation (the “Company”), TransDigm Group Incorporated, a Delaware corporation (“TD Group”), Adams Rite Aerospace, Inc., a California corporation (“Adams Rite”), MarathonNorco Aerospace, Inc., a Delaware corporation (“Marathon”), Champion Aerospace LLC, a Delaware limited liability company (“Champion”), Avionic Instruments LLC, a Delaware limited liability company (“Avionic”), Skurka Aerospace Inc., a Delaware corporation (“Skurka”), CDA InterCorp LLC, a Florida limited liability company (“CDA”), Aviation Technologies, Inc., a Delaware corporation (“ATI”), AvtechTyee, Inc., a Washington corporation (“Avtech”), Transicoil LLC, a Delaware limited liability company (“Transicoil”), AeroControlex Group, Inc., a Delaware corporation (“AeroControlex”), Bruce Aerospace Inc., a Delaware corporation (“Bruce Aerospace”), CEF Industries, LLC, a Delaware limited liability company (“CEF”), Acme Aerospace, Inc., a Delaware corporation (“Acme”), Dukes Aerospace, Inc., a Delaware corporation (“Dukes”), Semco Instruments, Inc., a Delaware corporation, (“Semco”), Hartwell Corporation, a California corporation (“Hartwell”), McKechnie Aerospace DE, Inc., a Delaware corporation (“McKechnie Aerospace DE”), McKechnie Aerospace Holdings, Inc., a Delaware corporation (“McKechnie Aerospace Holdings”), McKechnie Aerospace US LLC, a Delaware limited liability company (“McKechnie Aerospace US”), Texas Rotronics, Inc., a Texas corporation (“Rotronics”), Electromech Technologies LLC (formerly Western Sky Industries, LLC), a Delaware limited liability company (“Electromech”), Schneller LLC, a Delaware limited liability company (“Schneller”), HarcoSemco LLC, a Connecticut limited liability company (“HarcoSemco”), AmSafe Global Holdings, Inc., a Delaware corporation (“AmSafe Global”), Bridport Holdings, Inc., a Delaware corporation (“Bridport Holdings”), AmSafe, Inc., a Delaware corporation (“AmSafe Inc.”), Shield Restraint Systems, Inc. (formerly AmSafe Commercial Products, Inc.), a Delaware corporation (“Shield”),Bridport-Air Carrier, Inc., a Washington corporation (“Bridport-Air”), Bridport Erie Aviation, Inc., a Delaware corporation (“Bridport Erie”), Arkwin Industries, Inc., a New York corporation (“Arkwin”), Whippany Actuation Systems, LLC, a Delaware limited liability company (“Whippany”), Aerosonic LLC, a Delaware limited liability company (“Aerosonic”), Avionics Specialties, Inc., a Virginia corporation (“Avionics Specialties”), Airborne Global, Inc., a Delaware corporation (“Airborne Global”), Airborne Holdings, Inc., a Delaware Corporation (“Airborne Holdings”), Airborne Acquisition, Inc., a Delaware corporation (“Airborne Acquisitions”), Airborne Systems NA Inc., a Delaware corporation (“Airborne Systems NA”), Airborne Systems North America Inc., a Delaware corporation (“Airborne Systems North America”), Airborne Systems North America of CA Inc., a Delaware corporation (“Airborne Systems North America CA”), Airborne Systems North America of NJ Inc., a New Jersey corporation (“Airborne Systems North America NJ”), Telair US LLC, a Delaware limited liability company (“Telair US”), Telair International LLC, a Delaware limited liability company (“Telair International”), Pexco Aerospace, Inc., a Delaware corporation (“Pexco Aerospace”), PneuDraulics, Inc., a California corporation (“PneuDraulics”),Breeze-Eastern LLC, a Delaware limited liability company (“Breeze-Eastern”), ILC Holdings, Inc., a Delaware corporation (“ILC Holdings”), Data Device Corporation, a Delaware corporation (“DDC”), Beta Transformer Technology Corporation, a New York corporation (“Beta Corporation”), Beta Transformer Technology LLC, a Delaware limited liability company (“Beta LLC”), Young & Franklin Inc., a New York corporation (“Young & Franklin”), Tactair Fluid Controls, Inc., a New York corporation (“Tactair”), Johnson Liverpool LLC, a Delaware limited liability company (“Johnson Liverpool”), North Hills Signal
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