Although operated by North American Aviation, the plant was built and owned by the United States government.
The plant's "high bay" expansion was completed for a 1942 North American contract (never implemented) to build 200 Boeing B-29 Superfortress bombers at Fairfax alongside B-25 Mitchell.
After several outbuildings were added to the modification center, in October 1944 it became an adjunct[clarification needed] to the final assembly line.
[9] General Motors produced 599 F-84Fs at the Fairfax plant; the aircraft and vehicle production lines running parallel simultaneously.
[11][12] In 1985 production started in the new General Motors Fairfax Assembly Plant built on runways of the closed municipal airport.