<Page> 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): May 23, 2002 <Table> 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) - -------------------------------------------------------------------------------------------------------------------- (Former name, former address and former fiscal year, if changed since last report.) </Table> <Page> ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits The following exhibit is filed herewith 99.1 Press Release ITEM 9. REGULATION FD DISCLOSURE On May 23, 2002, TransDigm Inc. issued a press release announcing that it was contemplating a $75 million senior subordinated note offering. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. <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: May 23, 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: May 23, 2002 <Page> EXHIBIT INDEX Exhibit No. Description - ----------- ----------- 99.1 Press Release.