TransDigm Group has agreed to purchase Jet Parts Engineering and Victor Sierra Aviation Holdings, portfolio companies of Vance Street Capital, for approximately $2.2 billion in cash.

The deal expands TransDigm (NYSE: TDG)’s footprint in proprietary aerospace aftermarket parts, with both businesses generating nearly all of their revenue from commercial aftermarket sales. The acquisition is expected to support TransDigm’s long‑term, private‑equity‑like return objectives and allows the companies to operate independently within TransDigm’s platform.

Jet Parts Engineering, based in Seattle, Wash., is a designer and manufacturer of proprietary OEM‑alternative parts and repair solutions serving commercial, regional, and cargo airlines as well as MRO providers. Victor Sierra Aviation Holdings is a designer, manufacturer and distributor of PMA and aftermarket parts for the general and business aviation markets.