EX-21.1 5 exhibit211tdg202510-k.htm EX-21.1
Exhibit 21.1
SUBSIDIARIES OF TRANSDIGM GROUP INCORPORATED
TransDigm Inc. is a 100% owned subsidiary of TransDigm Group Incorporated. TransDigm Inc. owns directly or indirectly the following subsidiaries:

| Name of Subsidiary |  | Jurisdiction of Incorporation or Organization
| 4455 Genesee Properties, LLC |  | Delaware
| 4455 Genesee Street, LLC |  | Delaware
| 17111 Waterview Pkwy LLC |  | Delaware
| Acme Aerospace, Inc. |  | Delaware
| Adams Rite Aerospace GmbH |  | Germany
| Adams Rite Aerospace, Inc. |  | California
| AeroControlex Group, Inc. |  | Delaware
| Aerosonic LLC |  | Delaware
| Airborne Acquisition, Inc. |  | Delaware
| Airborne Global, Inc. |  | Delaware
| Airborne Holdings, Inc. |  | Delaware
| Airborne Systems Canada Ltd. |  | Canada
| Airborne Systems NA Inc. |  | Delaware
| Airborne Systems North America Inc. |  | Delaware
| Airborne Systems North America of CA Inc. |  | Delaware
| Airborne Systems North America of NJ Inc. |  | New Jersey
| Airborne Systems Pension Trust Limited |  | United Kingdom
| Airborne UK Parent Limited |  | United Kingdom
| Aircraft Materials Limited |  | United Kingdom
| AmSafe Aviation (Chongqing), Ltd. |  | China
| AmSafe Bridport (Kunshan) Co., Ltd. |  | China
| AmSafe Bridport (Private) Ltd. |  | Sri Lanka
| AmSafe Bridport Ltd. |  | United Kingdom
| AmSafe Global Holdings, Inc. |  | Delaware
| AmSafe Global Services (Private) Limited |  | Sri Lanka
| AmSafe, Inc. |  | Delaware
| Angus Electronics Co. |  | Delaware
| Apical Industries, Inc. |  | California
| ARA Deutschland GmbH |  | Germany
| ARA Holding GmbH |  | Germany
| Arkwin Industries, Inc. |  | New York
| Armtec Countermeasures Co. |  | Delaware
| Armtec Countermeasures TNO Co. |  | Delaware
| Armtec Defense Products Co. |  | Delaware
| Ashford Properties, LLC |  | Delaware
| Auxitrol SAS |  | France
| Auxitrol Weston Mexico, S. de R.L. de C.V. |  | Mexico
| Auxitrol Weston Singapore Pte. Ltd. |  | Singapore
| Auxitrol Weston USA, Inc. |  | Delaware

| Name of Subsidiary |  | Jurisdiction of Incorporation or Organization
| Aviation Technologies, Inc. |  | Delaware
| Avionic Instruments LLC |  | Delaware
| Avionics Specialties, Inc. |  | Virginia
| AvtechTyee, Inc. |  | Washington
| Beta Transformer Mexico, S. de R.L. de C.V. |  | Mexico
| Beta Transformer Technology LLC |  | Delaware
| Breeze-Eastern LLC |  | Delaware
| Bridport Erie Aviation, Inc. |  | Delaware
| Bridport Holdings, Inc. |  | Delaware
| Bridport Ltd. |  | United Kingdom
| Bridport-Air Carrier, Inc. |  | Washington
| Bruce Aerospace Inc. |  | Delaware
| Calspan Air Facilities, LLC |  | New York
| Calspan Air Services, LLC |  | New York
| Calspan ASE Portugal, Inc. |  | Minnesota
| Calspan Holdings, LLC |  | New York
| CALSPAN JETS LLC |  | Delaware
| Calspan Technology Acquisition LLC |  | Delaware
| Calspan, LLC |  | New York
| CDA InterCorp LLC |  | Florida
| CEF Industries, LLC |  | Delaware
| Champion Aerospace LLC |  | Delaware
| Chelton Avionics Holdings, Inc. |  | Delaware
| Chelton Avionics, Inc. |  | Delaware
| Chelton CTS Limited |  | United Kingdom
| Chelton Defence Communications Limited |  | United Kingdom
| Chelton Defense Products, Inc. |  | Delaware
| Chelton Limited |  | United Kingdom
| CMC Electronics Aurora LLC |  | Delaware
| CMC Electronics Inc. |  | Canada
| CPI EDB Intermediate Holdings, Inc. |  | Delaware
| CPI Electron Device Business, Inc. |  | Delaware
| CPI TMD Technologies Limited |  | United Kingdom
| CTHC LLC |  | New York
| Darchem Engineering Limited |  | United Kingdom
| Darchem Holdings Limited |  | United Kingdom
| Dart Aerospace B.V. |  | Netherlands
| Dart Aerospace Company |  | Canada
| Dart Aerospace ULC |  | Canada
| Dart Aerospace USA, Inc. |  | Washington
| Dart Buyer, Inc. |  | Delaware
| Dart Helicopter Services, Inc. |  | Delaware
| Dart Intermediate, Inc. |  | Delaware

| Name of Subsidiary |  | Jurisdiction of Incorporation or Organization
| Dart TopCo, Inc. |  | Delaware
| Data Device Corporation |  | Delaware
| DDC Electronics K.K. |  | Japan
| DDC Electronics Private Limited |  | India
| DDC Elektronik, GmbH |  | Germany
| Dukes Aerospace, Inc. |  | Delaware
| Electromech Technologies LLC |  | Delaware
| Elektro-Metall Export GmbH |  | Germany
| Elektro-Metall Paks KFT |  | Hungary
| EST Defence Company UK Limited |  | United Kingdom
| Esterline Acquisition Ltd |  | United Kingdom
| Esterline do Brasil Assessoria e Intermediação Ltda |  | Brazil
| Esterline Europe Company LLC |  | Delaware
| Esterline International Company |  | Delaware
| Esterline Technologies Corporation |  | Delaware
| Esterline Technologies Europe Limited |  | United Kingdom
| Esterline Technologies Global Limited |  | United Kingdom
| Esterline Technologies Holdings Limited |  | United Kingdom
| Esterline Technologies SGIP LLC |  | Delaware
| Esterline Technologies Unlimited |  | United Kingdom
| European Antennas Limited |  | United Kingdom
| FPT Industries LLC |  | Delaware
| F.P.T. Industries Ltd. |  | United Kingdom
| Genesee Holdings II, LLC |  | New York
| Genesee Holdings III, LLC |  | New York
| Genesee Holdings, LLC |  | New York
| HarcoSemco LLC |  | Connecticut
| Hartwell Corporation |  | California
| Heli Tech, Inc. |  | Oregon
| Hytek Finishes Co. |  | Delaware
| Iceman Holdco, Inc. |  | Delaware
| ILC Holdings, Inc. |  | Delaware
| Irvin Aerospace Limited |  | United Kingdom
| IrvinGQ France SAS |  | France
| IrvinGQ Limited |  | United Kingdom
| Janco Corporation |  | California
| Johnson Liverpool LLC |  | Delaware
| King Nutronics, LLC |  | Delaware
| Kirkhill Inc. |  | Delaware
| Korry Electronics Co. |  | Delaware
| Kunshan Shield Restraint Systems, Ltd. |  | China
| Leach Holding Corporation |  | Delaware
| Leach International Asia-Pacific Ltd |  | Hong Kong

| Name of Subsidiary |  | Jurisdiction of Incorporation or Organization
| Leach International Corporation |  | Delaware
| Leach International Europe S.A.S. |  | France
| Leach International Germany GmbH |  | Germany
| Leach International Mexico S. de R. L. de C. V. |  | Mexico
| Leach International UK Ltd |  | United Kingdom
| Leach Mexico Holding LLC |  | Delaware
| Leach Technology Group, Inc. |  | Delaware
| MarathonNorco Aerospace, Inc. |  | Delaware
| Mason Electric Co. |  | Delaware
| McKechnie Aerospace (Europe) Ltd. |  | United Kingdom
| McKechnie Aerospace DE, Inc. |  | Delaware
| McKechnie Aerospace DE, LP |  | United Kingdom
| McKechnie Aerospace US LLC |  | Delaware
| Mecanismos de Matamoros S. de R.L. de C.V. |  | Mexico
| Medtherm Labs, LLC |  | Delaware
| Microwave Power Products, Inc. |  | Delaware
| NAT Seattle Inc. |  | Delaware
| NMC Aerospace, S. de R.L. de C.V. |  | Mexico
| NMC Group, Inc. |  | California
| Nordisk Asia Pacific Limited |  | Hong Kong
| Nordisk Asia Pacific Pte Ltd |  | Singapore
| Nordisk Aviation Products (Kunshan) Ltd. |  | China
| Nordisk Aviation Products AS |  | Norway
| Nordisk Aviation Products LLC |  | Delaware
| North Hills Signal Processing Corp. |  | Delaware
| North Hills Signal Processing Overseas LLC |  | Delaware
| Norwich Aero Products Inc. |  | New York
| Offshore Helicopter Support Services, Inc. |  | Louisiana
| Oppenheimer Precision Products, Inc. |  | Pennsylvania
| Palomar Products, Inc. |  | Delaware
| Paravion Technology, Inc. |  | Colorado
| Pexco Aerospace, Inc. |  | Delaware
| PneuDraulics, Inc. |  | California
| Power Device Corporation |  | New York
| Power Device UK Limited |  | United Kingdom
| Pressure Systems International Ltd |  | United Kingdom
| Raptor Labs HoldCo, LLC |  | Delaware
| Raptor Labs Intermediate, LLC |  | Delaware
| Schneller Asia Pte. Ltd. |  | Singapore
| Schneller LLC |  | Delaware
| Schneller S.A.R.L. |  | France
| SEI Industries LTD. |  | Canada
| Semco Instruments, Inc. |  | Delaware

| Name of Subsidiary |  | Jurisdiction of Incorporation or Organization
| Sensor Concepts, LLC |  | Delaware
| Servotronics, Inc. |  | Delaware
| Shield Restraint Systems Ltd. |  | United Kingdom
| Shield Restraint Systems, Inc. |  | Delaware
| Shield Restraint Systems (Pvt) Ltd. |  | Sri Lanka
| Signal Processing Matamoros S.A. de C.V. |  | Mexico
| Simplex Manufacturing Co. |  | Oregon
| Skandia, Inc. |  | Illinois
| Skurka Aerospace Inc. |  | Delaware
| Space Electronics LLC |  | Delaware
| Symetrics Industries, LLC |  | Florida
| TA Aerospace Co. |  | California
| TA Mfg Limited |  | United Kingdom
| Tactair Fluid Controls, Inc. |  | New York
| TDG Dart Limited |  | United Kingdom
| TDG ESL Holdings Inc. |  | Delaware
| TDG France Ultimate Parent SAS |  | France
| TDG Germany GmbH |  | Germany
| TEAC Aerospace Technologies, Inc. |  | Delaware
| Telair International GmbH |  | Germany
| Telair Management Services GmbH |  | Germany
| Telair US LLC |  | Delaware
| TestVonics, Inc. |  | New Hampshire
| Texas Rotronics, Inc. |  | Texas
| TMD Holdings Limited |  | United Kingdom
| TMD Technologies Limited |  | United Kingdom
| TransDigm Canada ULC |  | Canada
| TransDigm European Holdings Limited |  | United Kingdom
| TransDigm Ireland Ltd. |  | Ireland
| TransDigm Microwave Limited |  | United Kingdom
| TransDigm Receivables LLC |  | Delaware
| TransDigm Technologies India Private Limited |  | India
| TransDigm UK Holdings Limited |  | United Kingdom
| Transicoil (Malaysia) Sendirian Berhad |  | Malaysia
| Transicoil LLC |  | Delaware
| Wallop Defence UK Limited |  | United Kingdom
| Weston Aerospace Ltd |  | United Kingdom
| Whippany Actuation Systems, LLC |  | Delaware
| XCEL Power Systems Ltd. |  | United Kingdom
| Young & Franklin Inc. |  | New York