The U.S. Air Force has awarded Raytheon Technologies [RTX] a more than $5.5 billion contract for F117 engine sustainment.

“The modification brings the total cumulative face value of the contract to $8,241,064,215 from $2,740,747,815,” the Air Force said in a contract announcement. “Work will be performed in San Francisco, California; Columbus, Georgia; and Tinker Air Force Base, Oklahoma, and is expected to be completed by Sept. 30, 2027. This contract involves Foreign Military Sales to the United Kingdom, Canada, Australia, United Arab Emirates, Qatar, India, and Kuwait.”

The F117, the military version of Pratt & Whitney’s PW2000 commercial engine, powers the Boeing [BA] C-17 transport.

The C-17 has four F117s, each certified at 40,400 pounds of thrust, and “can carry a payload of 160,600 pounds, take off from a 7,600-foot airfield, and fly 2,400 nautical miles unrefueled,” according to Pratt & Whitney. “The C-17 aircraft has in-flight refueling capability, and can also land on small austere airfields of 3,000 feet or less.” The U.S. military used the C-17 heavily in the withdrawal from Afghanistan in 2021 and in humanitarian relief missions.