X0101 EFFECT 33 LIVE 2011-08-17 15:00:00

S-4

0001260221 TransDigm Group INC 333-174781 0001077670 TRANSDIGM INC 333-174781-26 0001077673 MarathonNorco Aerospace, Inc. 333-174781-25 0001377127 Skurka Aerospace Inc. 333-174781-24 0001084402 ADAMS RITE AEROSPACE INC 333-174781-23 0001377125 Avionic Instruments LLC 333-174781-22 0001378716 CDA INTERCORP LLC 333-174781-21 0001403204 Aviation Technologies, Inc. 333-174781-20 0001403202 Transicoil LLC 333-174781-19 0001404922 AeroControlex Group, Inc. 333-174781-18 0000714124 AVTECH CORP 333-174781-17 0001403770 Malaysian Aerospace Services, Inc. 333-174781-16 0001486752 ACME Aerospace, Inc. 333-174781-15 0001486781 Dukes Aerospace, Inc. 333-174781-14 0001486784 Bruce Aerospace, Inc. 333-174781-13 0001486789 Aircraft Parts Corp 333-174781-12 0001486783 CEF Industries, LLC 333-174781-11 0001486857 Bruce Industries, Inc. 333-174781-10 0001518070 Texas Rotronics, Inc. 333-174781-09 0001518071 Western Sky Industries, LLC 333-174781-08 0001518069 Semco Instruments, Inc. 333-174781-07 0001518068 McKechnie Aerospace US LLC 333-174781-06 0001518067 McKechnie Aerospace Investments, Inc. 333-174781-05 0001518066 McKechnie Aerospace Holdings, Inc. 333-174781-04 0001518065 McKechnie Aerospace DE, Inc. 333-174781-03 0001142160 CHAMPION AEROSPACE LLC 333-174781-02 0001518064 Hartwell Corp 333-174781-01