Transdigm 10-Q 2004 Q2 Quarterly report

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of TransDigm Holding Company (the “Company”) for the thirteen and twenty-six week periods ended March 27, 2004 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gregory Rufus, Vice President, Chief Financial Officer and Assistant Secretary (Principal Financial and Accounting Officer) certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

2. The information contained in the Report fairly presents in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

Date: May 5, 2004

/s/    Gregory Rufus        

Name: Gregory Rufus

Title: Vice President, Chief Financial
          Officer and Assistant Secretary
          (Principal Financial and Accounting Officer)