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 ...

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 ...

Pratt & Whitney is under contract to deliver 141 F135 engines for the 18th lot of F-35s. (Rick Goodfriend/Air Force) The U.S. Navy on Friday awarded Pratt & Whitney a contract modification worth up to ...

FORT WORTH (Reuters) - U.S. Defence Secretary Robert Gates threw his support behind Lockheed Martin's F-35 on Monday amid mounting speculation the new fighter could face cuts as part of future ...