C‑17 Globemaster III First Flight Details

On September 15 , 1991, the C‑17 Globemaster III departed Long Beach, California, for its inaugural flight. It touched down at Edwards AFB after a 2‑hour 24‑minute mission. (Primary source)

During its first week of testing, the aircraft performed three missions to evaluate flight handling at different altitudes, verify emergency backup systems, and demonstrate the performance of flaps, slats and landing gear. (Primary source)

The initial C‑17 squadron entered operational service with the U.S. Air Force in January 1995, and the aircraft was awarded the Collier Trophy in May 1995 for its aeronautical achievements. (Primary source)