The U.S. Dept. of Defense made a $2.88-billion award to Pratt & Whitney in a modification to a prior contract for manufacturing 141 more F135 engines. Those engines are the power source for the F-35 ...

PARIS—A key milestone for the Pentagon’s program to upgrade the F-35 engine has been pushed back a year, raising questions about the overall timeline of the effort. The engine upgrade will reach ...

Add Yahoo as a preferred source to see more of our stories on Google. The F-35 program is delaying some of its planned Block 4 upgrades as it focuses on delivering capabilities as early as 2031. (A1C ...

The $2.8B contract funds 141 F135 engines for U.S. services and allies, securing production, spares, and upgrades through February 2028. Pratt & Whitney has been awarded a major contract, valued at ...

The F-35 Lightning II fighter jet is the most expensive fighter procurement program in modern history. Pratt & Whitney, the engine manufacturer for the F-35 Lightning II stealth fighter jet, recently ...

The F-35 Joint Strike Fighter program is scaling back its ambitions for a slate of upgrades called Block 4, the Government Accountability Office said Wednesday, as the aircraft struggles with ...