Exhibit 99.1

TransDigm Group Incorporated Announces Successful Completion of

Additional Notes Offering

Cleveland, OH, December 22, 2010 — TransDigm Group Incorporated (“TransDigm Group”) (NYSE: TDG), announced today that its wholly-owned subsidiary, TransDigm Inc. (the “Company”), has successfully completed its previously announced offering of an additional $50 million of 7.75% Senior Subordinated Notes due 2018 (the “Notes”).

The Notes and related guarantees were offered only to qualified institutional buyers in reliance on the exemption from registration set forth in Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and outside the United States to non-U.S. persons in reliance on the exemption from registration set forth in Regulation S under the Securities Act. The Notes and the related guarantees have not been registered under the Securities Act, or the securities laws of any state or other jurisdiction, and may not be offered or sold in the United States without registration or an applicable exemption from the Securities Act, applicable state securities or blue sky laws and foreign securities laws.

This press release shall not constitute an offer to sell, or the solicitation of an offer to buy, any securities, nor shall there be any sales of securities mentioned in this press release in any state or foreign jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or foreign jurisdiction.

About TransDigm Group

TransDigm Group, through its wholly-owned subsidiaries, including TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. Major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, aircraft audio systems, specialized cockpit displays, engineered latching and locking devices, specialized lavatory components, engineered connectors and elastomers, rods and locking devices, NiCad batteries/chargers, and lighting and control technology. More information can be found at www.transdigm.com.

Safe Harbor Statement

This press release contains “forward-looking statements” within the meaning of federal securities law. You should exercise caution in interpreting and relying on forward-looking statements because they involve known and unknown risks, uncertainties and other factors which are, in some cases, beyond the Company’s control. Such risks and uncertainties include, but are not limited to, the effect of general economic conditions and other factors listed in the Company’s filings with the Securities and Exchange Commission.