| Form: | S-4 |
| CIK: | 0001260221 | | Company Name: | TransDigm Group INC | | File Number: | 333-174781 |
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| CIK: | 0001077670 | | Company Name: | TRANSDIGM INC | | File Number: | 333-174781-26 |
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| CIK: | 0001077673 | | Company Name: | MarathonNorco Aerospace, Inc. | | File Number: | 333-174781-25 |
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| CIK: | 0001377127 | | Company Name: | Skurka Aerospace Inc. | | File Number: | 333-174781-24 |
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| CIK: | 0001084402 | | Company Name: | ADAMS RITE AEROSPACE INC | | File Number: | 333-174781-23 |
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| CIK: | 0001377125 | | Company Name: | Avionic Instruments LLC | | File Number: | 333-174781-22 |
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| CIK: | 0001378716 | | Company Name: | CDA INTERCORP LLC | | File Number: | 333-174781-21 |
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| CIK: | 0001403204 | | Company Name: | Aviation Technologies, Inc. | | File Number: | 333-174781-20 |
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| CIK: | 0001403202 | | Company Name: | Transicoil LLC | | File Number: | 333-174781-19 |
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| CIK: | 0001404922 | | Company Name: | AeroControlex Group, Inc. | | File Number: | 333-174781-18 |
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| CIK: | 0001403770 | | Company Name: | Malaysian Aerospace Services, Inc. | | File Number: | 333-174781-16 |
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| CIK: | 0001486752 | | Company Name: | ACME Aerospace, Inc. | | File Number: | 333-174781-15 |
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| CIK: | 0001486781 | | Company Name: | Dukes Aerospace, Inc. | | File Number: | 333-174781-14 |
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| CIK: | 0001486784 | | Company Name: | Bruce Aerospace, Inc. | | File Number: | 333-174781-13 |
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| CIK: | 0001486789 | | Company Name: | Aircraft Parts Corp | | File Number: | 333-174781-12 |
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| CIK: | 0001486783 | | Company Name: | CEF Industries, LLC | | File Number: | 333-174781-11 |
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| CIK: | 0001486857 | | Company Name: | Bruce Industries, Inc. | | File Number: | 333-174781-10 |
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| CIK: | 0001518070 | | Company Name: | Texas Rotronics, Inc. | | File Number: | 333-174781-09 |
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| CIK: | 0001518071 | | Company Name: | Western Sky Industries, LLC | | File Number: | 333-174781-08 |
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| CIK: | 0001518069 | | Company Name: | Semco Instruments, Inc. | | File Number: | 333-174781-07 |
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| CIK: | 0001518068 | | Company Name: | McKechnie Aerospace US LLC | | File Number: | 333-174781-06 |
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| CIK: | 0001518067 | | Company Name: | McKechnie Aerospace Investments, Inc. | | File Number: | 333-174781-05 |
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| CIK: | 0001518066 | | Company Name: | McKechnie Aerospace Holdings, Inc. | | File Number: | 333-174781-04 |
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| CIK: | 0001518065 | | Company Name: | McKechnie Aerospace DE, Inc. | | File Number: | 333-174781-03 |
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| CIK: | 0001142160 | | Company Name: | CHAMPION AEROSPACE LLC | | File Number: | 333-174781-02 |
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| CIK: | 0001518064 | | Company Name: | Hartwell Corp | | File Number: | 333-174781-01 |
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