Slated to run until 2022, the bilateral deal will see the delivery of spares, design services, reliability, and maintenance enhancements for the RAF’s eight C-17A aircraft.
The scope of the FMS agreement will also ensure access to technical resources in addition to training programmes conducted for RAF aircrew and maintenance crew.
UK Defence Minister Guto Bebb said: “Our C-17 giants take everything from heavy equipment to vital troops to where they’re needed right across the globe.
“This deal keeps them in the air into the next decade and affirms our leadership, alongside our American allies, in providing global security and humanitarian aid as we stand together in defence of our shared values.”
The current agreement will help retain more than 50 job opportunities in the country through the support of a Boeing team at RAF Brize Norton.
Additional work on the project will be conducted at the company facilities in San Antonio, Texas, US.
The heavy-lift transport aircraft can be deployed by the airforce to transport large equipment, supplies, and troops in challenging terrain anywhere across the world.
Developed by Boeing, C-17 is a high-wing, four-engine, T-tailed military transport aircraft that is capable of carrying 77t of cargo and has a maximum airspeed of approximately 510 miles every hour.