UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

NOTICE OF EFFECTIVENESS

Effective Date: May 24, 2017
Form: S-4
CIK: 0001260221
Company Name: TransDigm Group INC
File Number: 333-217850
CIK: 0001518068
Company Name: McKechnie Aerospace US LLC
File Number: 333-217850-59
CIK: 0001518065
Company Name: McKechnie Aerospace DE, Inc.
File Number: 333-217850-58
CIK: 0001518067
Company Name: McKechnie Aerospace Investments, Inc.
File Number: 333-217850-57
CIK: 0001518070
Company Name: Texas Rotronics, Inc.
File Number: 333-217850-56
CIK: 0001518071
Company Name: Electromech Technologies LLC
File Number: 333-217850-55
CIK: 0001614964
Company Name: Airborne Systems North America of NJ Inc.
File Number: 333-217850-54
CIK: 0001529278
Company Name: Schneller LLC
File Number: 333-217850-53
CIK: 0001567701
Company Name: HARCO LLC
File Number: 333-217850-52
CIK: 0001486752
Company Name: ACME Aerospace, Inc.
File Number: 333-217850-51
CIK: 0001567706
Company Name: Bridport Holdings, Inc.
File Number: 333-217850-50
CIK: 0001567717
Company Name: Bridport Erie Aviation, Inc.
File Number: 333-217850-49
CIK: 0001567707
Company Name: AmSafe, Inc.
File Number: 333-217850-48
CIK: 0001567722
Company Name: Bridport-Air Carrier, Inc.
File Number: 333-217850-47
CIK: 0000007340
Company Name: ARKWIN INDUSTRIES INC
File Number: 333-217850-46
CIK: 0001614930
Company Name: Aerosonic LLC
File Number: 333-217850-45
CIK: 0001614966
Company Name: Airborne Global Inc.
File Number: 333-217850-44
CIK: 0001580072
Company Name: Whippany Actuation Systems, LLC
File Number: 333-217850-43
CIK: 0001614965
Company Name: Airborne Acquisition, Inc.
File Number: 333-217850-42
CIK: 0001614968
Company Name: Airborne Systems North America Inc.
File Number: 333-217850-41
CIK: 0001615730
Company Name: Airborne Holdings, Inc.
File Number: 333-217850-40
CIK: 0001614967
Company Name: Airborne Systems NA Inc.
File Number: 333-217850-39
CIK: 0001614963
Company Name: Airborne Systems North America of CA Inc.
File Number: 333-217850-38
CIK: 0001638075
Company Name: Telair US LLC
File Number: 333-217850-37
CIK: 0001657901
Company Name: Pexco Aerospace, Inc.
File Number: 333-217850-36
CIK: 0001657904
Company Name: PneuDraulics, Inc.
File Number: 333-217850-35
CIK: 0001639209
Company Name: Telair International LLC
File Number: 333-217850-34
CIK: 0001077670
Company Name: TRANSDIGM INC
File Number: 333-217850-33
CIK: 0001077673
Company Name: MarathonNorco Aerospace, Inc.
File Number: 333-217850-32
CIK: 0001706089
Company Name: North Hills Signal Processing Corp.
File Number: 333-217850-31
CIK: 0001706090
Company Name: North Hills Signal Processing Overseas Corp.
File Number: 333-217850-30
CIK: 0001704630
Company Name: Interiors in Flight LLC
File Number: 333-217850-29
CIK: 0001704586
Company Name: SCHROTH Safety Products LLC
File Number: 333-217850-28
CIK: 0001689276
Company Name: Data Device Corp
File Number: 333-217850-27
CIK: 0000099359
Company Name: BREEZE-EASTERN LLC
File Number: 333-217850-26
CIK: 0001689284
Company Name: Beta Transformer Technology Corp
File Number: 333-217850-25
CIK: 0001689285
Company Name: Beta Transformer Technology LLC
File Number: 333-217850-24
CIK: 0001689430
Company Name: Johnson Liverpool LLC
File Number: 333-217850-23
CIK: 0001567715
Company Name: Shield Restraint Systems, Inc.
File Number: 333-217850-22
CIK: 0001142160
Company Name: CHAMPION AEROSPACE LLC
File Number: 333-217850-21
CIK: 0001486781
Company Name: Dukes Aerospace, Inc.
File Number: 333-217850-20
CIK: 0001486784
Company Name: Bruce Aerospace, Inc.
File Number: 333-217850-19
CIK: 0001486783
Company Name: CEF Industries, LLC
File Number: 333-217850-18
CIK: 0001518069
Company Name: Semco Instruments, Inc.
File Number: 333-217850-17
CIK: 0001518064
Company Name: Hartwell Corp
File Number: 333-217850-16
CIK: 0001518066
Company Name: McKechnie Aerospace Holdings, Inc.
File Number: 333-217850-15
CIK: 0001377127
Company Name: Skurka Aerospace Inc.
File Number: 333-217850-14
CIK: 0001084402
Company Name: ADAMS RITE AEROSPACE INC
File Number: 333-217850-13
CIK: 0001377125
Company Name: Avionic Instruments LLC
File Number: 333-217850-12
CIK: 0001378716
Company Name: CDA INTERCORP LLC
File Number: 333-217850-11
CIK: 0001403204
Company Name: Aviation Technologies, Inc.
File Number: 333-217850-10
CIK: 0001403202
Company Name: Transicoil LLC
File Number: 333-217850-09
CIK: 0001404922
Company Name: AeroControlex Group, Inc.
File Number: 333-217850-08
CIK: 0000714124
Company Name: AvtechTyee, Inc.
File Number: 333-217850-07
CIK: 0001614971
Company Name: Avionics Specialties, Inc.
File Number: 333-217850-06
CIK: 0001689271
Company Name: ILC Industries, LLC
File Number: 333-217850-05
CIK: 0001689277
Company Name: Tactair Fluid Controls, Inc.
File Number: 333-217850-04
CIK: 0001689275
Company Name: Young & Franklin Inc.
File Number: 333-217850-03
CIK: 0001689429
Company Name: ILC Holdings, Inc.
File Number: 333-217850-02
CIK: 0001418099
Company Name: AmSafe Global Holdings Inc
File Number: 333-217850-01
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