<Page> <Table> SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 26, 2002 TransDigm Inc. TransDigm Holding Company - ----------------------------------------------------------- ------------------------------------------------------ (Exact name of registrant as specified in its charter) (Exact name of registrant as specified in its charter) Delaware Delaware - ----------------------------------------------------------- ------------------------------------------------------ (State or other Jurisdiction of (State or other Jurisdiction of incorporation or organization) incorporation or organization) 34-1750032 13-3733378 - ----------------------------------------------------------- ------------------------------------------------------ (I.R.S. Employer Identification No.) (I.R.S. Employer Identification No.) 26380 CURTISS WRIGHT PARKWAY, RICHMOND HEIGHTS, OHIO 44143 - -------------------------------------------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) (216) 289-4939 - -------------------------------------------------------------------------------------------------------------------- (Registrants' telephone number, including area code) </Table> (Former name, former address and former fiscal year, if changed since last report.) <Page> ITEM 5. OTHER EVENTS On July 26, 2002, TransDigm Inc. (the "Company") announced an offer to exchange up to $75 million in aggregate principal amount of its registered Series B 10 3/8% Senior Subordinated Notes due 2008 for its outstanding unregistered Series A 10 3/8% Senior Subordinated Notes due 2008. The exchange offer will expire at 5:00 p.m. New York City time on Friday, September 6, 2002, unless TransDigm, in its sole discretion, decides to extend the exchange offer. A copy of the press release is attached hereto as Exhibit 99 and is incorporated in its entirety herein by reference. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits The following exhibit is filed herewith 99.1 Press Release of TransDigm Inc., dated as of July 26, 2002 <Page> SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Co-Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. TRANSDIGM HOLDING COMPANY By: /s/ Gregory Rufus ----------------------------------------- Gregory Rufus Chief Financial Officer Date: July 26, 2002 Pursuant to the requirements of the Securities Exchange Act of 1934, the Co-Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. TRANSDIGM INC. By: /s/ Gregory Rufus ----------------------------------------- Gregory Rufus Chief Financial Officer Date: July 26, 2002 <Page> Index of Exhibits Exhibit No. Description - ----------- ----------- 99 Press Release of TransDigm Inc., dated as of July 26, 2002.