| Form: | S-4 |
| CIK: | 0001260221 | | Company Name: | TransDigm Group INC | | File Number: | 333-258676 | |
| CIK: | 0000007340 | | Company Name: | ARKWIN INDUSTRIES INC | | File Number: | 333-258676-92 | |
| CIK: | 0000033619 | | Company Name: | ESTERLINE TECHNOLOGIES CORP | | File Number: | 333-258676-91 | |
| CIK: | 0000099359 | | Company Name: | BREEZE-EASTERN LLC | | File Number: | 333-258676-90 | |
| CIK: | 0000714124 | | Company Name: | AvtechTyee, Inc. | | File Number: | 333-258676-89 | |
| CIK: | 0000739013 | | Company Name: | NORWICH AERO PRODUCTS INC | | File Number: | 333-258676-88 | |
| CIK: | 0001077670 | | Company Name: | TRANSDIGM INC | | File Number: | 333-258676-87 | |
| CIK: | 0001077673 | | Company Name: | MarathonNorco Aerospace, Inc. | | File Number: | 333-258676-86 | |
| CIK: | 0001084402 | | Company Name: | ADAMS RITE AEROSPACE INC | | File Number: | 333-258676-85 | |
| CIK: | 0001142160 | | Company Name: | CHAMPION AEROSPACE LLC | | File Number: | 333-258676-84 | |
| CIK: | 0001264276 | | Company Name: | ANGUS ELECTRONICS CO | | File Number: | 333-258676-83 | |
| CIK: | 0001264277 | | Company Name: | ARMTEC COUNTERMEASURES CO | | File Number: | 333-258676-82 | |
| CIK: | 0001264278 | | Company Name: | ARMTEC DEFENSE PRODUCTS CO | | File Number: | 333-258676-81 | |
| CIK: | 0001264279 | | Company Name: | Auxitrol Weston USA, Inc. | | File Number: | 333-258676-80 | |
| CIK: | 0001264289 | | Company Name: | HYTEK FINISHES CO | | File Number: | 333-258676-79 | |
| CIK: | 0001264290 | | Company Name: | JANCO CORP | | File Number: | 333-258676-78 | |
| CIK: | 0001264292 | | Company Name: | KORRY ELECTRONICS CO | | File Number: | 333-258676-77 | |
| CIK: | 0001264293 | | Company Name: | MASON ELECTRIC CO | | File Number: | 333-258676-76 | |
| CIK: | 0001377125 | | Company Name: | Avionic Instruments LLC | | File Number: | 333-258676-75 | |
| CIK: | 0001377127 | | Company Name: | Skurka Aerospace Inc. | | File Number: | 333-258676-74 | |
| CIK: | 0001378716 | | Company Name: | CDA INTERCORP LLC | | File Number: | 333-258676-73 | |
| CIK: | 0001403202 | | Company Name: | Transicoil LLC | | File Number: | 333-258676-72 | |
| CIK: | 0001403204 | | Company Name: | Aviation Technologies, Inc. | | File Number: | 333-258676-71 | |
| CIK: | 0001404701 | | Company Name: | Leach Holding CORP | | File Number: | 333-258676-70 | |
| CIK: | 0001404702 | | Company Name: | Leach International Corp | | File Number: | 333-258676-69 | |
| CIK: | 0001404704 | | Company Name: | Leach Technology Group, Inc. | | File Number: | 333-258676-68 | |
| CIK: | 0001404705 | | Company Name: | Palomar Products, Inc. | | File Number: | 333-258676-67 | |
| CIK: | 0001404710 | | Company Name: | Armtec Countermeasures TNO Co. | | File Number: | 333-258676-66 | |
| CIK: | 0001404713 | | Company Name: | CMC Electronics Aurora LLC | | File Number: | 333-258676-65 | |
| CIK: | 0001404922 | | Company Name: | AeroControlex Group, Inc. | | File Number: | 333-258676-64 | |
| CIK: | 0001418099 | | Company Name: | AmSafe Global Holdings Inc | | File Number: | 333-258676-63 | |
| CIK: | 0001486752 | | Company Name: | ACME Aerospace, Inc. | | File Number: | 333-258676-62 | |
| CIK: | 0001486781 | | Company Name: | Dukes Aerospace, Inc. | | File Number: | 333-258676-61 | |
| CIK: | 0001486783 | | Company Name: | CEF Industries, LLC | | File Number: | 333-258676-60 | |
| CIK: | 0001486784 | | Company Name: | Bruce Aerospace, Inc. | | File Number: | 333-258676-59 | |
| CIK: | 0001495702 | | Company Name: | Extant Components Group Holdings, Inc. | | File Number: | 333-258676-58 | |
| CIK: | 0001503143 | | Company Name: | Esterline International Co | | File Number: | 333-258676-57 | |
| CIK: | 0001503144 | | Company Name: | NMC Group, Inc. | | File Number: | 333-258676-56 | |
| CIK: | 0001518064 | | Company Name: | Hartwell Corp | | File Number: | 333-258676-55 | |
| CIK: | 0001518065 | | Company Name: | McKechnie Aerospace DE, Inc. | | File Number: | 333-258676-54 | |
| CIK: | 0001518066 | | Company Name: | McKechnie Aerospace Holdings, Inc. | | File Number: | 333-258676-53 | |
| CIK: | 0001518068 | | Company Name: | McKechnie Aerospace US LLC | | File Number: | 333-258676-52 | |
| CIK: | 0001518069 | | Company Name: | Semco Instruments, Inc. | | File Number: | 333-258676-51 | |
| CIK: | 0001518070 | | Company Name: | Texas Rotronics, Inc. | | File Number: | 333-258676-50 | |
| CIK: | 0001518071 | | Company Name: | Electromech Technologies LLC | | File Number: | 333-258676-49 | |
| CIK: | 0001529278 | | Company Name: | Schneller LLC | | File Number: | 333-258676-48 | |
| CIK: | 0001567701 | | Company Name: | HarcoSemco LLC. | | File Number: | 333-258676-47 | |
| CIK: | 0001567706 | | Company Name: | Bridport Holdings, Inc. | | File Number: | 333-258676-46 | |
| CIK: | 0001567707 | | Company Name: | AmSafe, Inc. | | File Number: | 333-258676-45 | |
| CIK: | 0001567715 | | Company Name: | Shield Restraint Systems, Inc. | | File Number: | 333-258676-44 | |
| CIK: | 0001567717 | | Company Name: | Bridport Erie Aviation, Inc. | | File Number: | 333-258676-43 | |
| CIK: | 0001567722 | | Company Name: | Bridport-Air Carrier, Inc. | | File Number: | 333-258676-42 | |
| CIK: | 0001580072 | | Company Name: | Whippany Actuation Systems, LLC | | File Number: | 333-258676-41 | |
| CIK: | 0001614930 | | Company Name: | Aerosonic LLC | | File Number: | 333-258676-40 | |
| CIK: | 0001614963 | | Company Name: | Airborne Systems North America of CA Inc. | | File Number: | 333-258676-39 | |
| CIK: | 0001614964 | | Company Name: | Airborne Systems North America of NJ Inc. | | File Number: | 333-258676-38 | |
| CIK: | 0001614965 | | Company Name: | Airborne Acquisition, Inc. | | File Number: | 333-258676-37 | |
| CIK: | 0001614966 | | Company Name: | Airborne Global Inc. | | File Number: | 333-258676-36 | |
| CIK: | 0001614967 | | Company Name: | Airborne Systems NA Inc. | | File Number: | 333-258676-35 | |
| CIK: | 0001614968 | | Company Name: | Airborne Systems North America Inc. | | File Number: | 333-258676-34 | |
| CIK: | 0001614971 | | Company Name: | Avionics Specialties, Inc. | | File Number: | 333-258676-33 | |
| CIK: | 0001615730 | | Company Name: | Airborne Holdings, Inc. | | File Number: | 333-258676-32 | |
| CIK: | 0001638075 | | Company Name: | Telair US LLC | | File Number: | 333-258676-31 | |
| CIK: | 0001657901 | | Company Name: | Pexco Aerospace, Inc. | | File Number: | 333-258676-30 | |
| CIK: | 0001657904 | | Company Name: | PneuDraulics, Inc. | | File Number: | 333-258676-29 | |
| CIK: | 0001689275 | | Company Name: | Young & Franklin Inc. | | File Number: | 333-258676-28 | |
| CIK: | 0001689276 | | Company Name: | Data Device Corp | | File Number: | 333-258676-27 | |
| CIK: | 0001689277 | | Company Name: | Tactair Fluid Controls, Inc. | | File Number: | 333-258676-26 | |
| CIK: | 0001689284 | | Company Name: | Beta Transformer Technology Corp | | File Number: | 333-258676-25 | |
| CIK: | 0001689285 | | Company Name: | Beta Transformer Technology LLC | | File Number: | 333-258676-24 | |
| CIK: | 0001689429 | | Company Name: | ILC Holdings, Inc. | | File Number: | 333-258676-23 | |
| CIK: | 0001689430 | | Company Name: | Johnson Liverpool LLC | | File Number: | 333-258676-22 | |
| CIK: | 0001706089 | | Company Name: | North Hills Signal Processing Corp. | | File Number: | 333-258676-21 | |
| CIK: | 0001706090 | | Company Name: | North Hills Signal Processing Overseas Corp. | | File Number: | 333-258676-20 | |
| CIK: | 0001758410 | | Company Name: | TransDigm UK Holdings plc | | File Number: | 333-258676-19 | |
| CIK: | 0001758412 | | Company Name: | Extant Components Group Intermediate, Inc. | | File Number: | 333-258676-18 | |
| CIK: | 0001758436 | | Company Name: | Symetrics Industries, LLC | | File Number: | 333-258676-17 | |
| CIK: | 0001758441 | | Company Name: | Kirkhill Inc. | | File Number: | 333-258676-16 | |
| CIK: | 0001758445 | | Company Name: | Skandia, Inc. | | File Number: | 333-258676-15 | |
| CIK: | 0001758503 | | Company Name: | Symetrics Technology Group, LLC | | File Number: | 333-258676-14 | |
| CIK: | 0001758515 | | Company Name: | TEAC Aerospace Holdings, Inc. | | File Number: | 333-258676-13 | |
| CIK: | 0001758516 | | Company Name: | TEAC Aerospace Technologies, Inc. | | File Number: | 333-258676-12 | |
| CIK: | 0001771839 | | Company Name: | Esterline Europe Co LLC | | File Number: | 333-258676-11 | |
| CIK: | 0001771841 | | Company Name: | 17111 Waterview Pkwy LLC | | File Number: | 333-258676-10 | |
| CIK: | 0001771896 | | Company Name: | Esterline Technologies SGIP LLC | | File Number: | 333-258676-09 | |
| CIK: | 0001771913 | | Company Name: | TA Aerospace Co. | | File Number: | 333-258676-08 | |
| CIK: | 0001811408 | | Company Name: | TDG ESL Holdings Inc. | | File Number: | 333-258676-07 | |
| CIK: | 0001868407 | | Company Name: | Chelton Avionics, Inc. | | File Number: | 333-258676-06 | |
| CIK: | 0001868414 | | Company Name: | Chelton Avionics Holdings, Inc. | | File Number: | 333-258676-05 | |
| CIK: | 0001868319 | | Company Name: | Cobham Defense Products, Inc. | | File Number: | 333-258676-04 | |
| CIK: | 0001868286 | | Company Name: | Leach Mexico Holding LLC | | File Number: | 333-258676-03 | |
| CIK: | 0001867988 | | Company Name: | NAT Seattle Inc. | | File Number: | 333-258676-02 | |
| CIK: | 0001639209 | | Company Name: | Nordisk Aviation Products LLC | | File Number: | 333-258676-01 | |
