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Asked whether the Air Force would be willing to try again on pursuing an adaptive engine if Congress provided more funding, service Secretary Frank Kendall said, "No, we've made our decision."
Deliveries of the jet were halted after the crash of an F-35B in December. Even as a root cause has yet to be identified, the F-35 Joint Program Office said acceptances resumed after implementing mitigation efforts for one identified engine issue.
The U.S. Air Force isn't building a new F-35 engine after all.
The US Air Force (USAF) has elected to end participation in the Adaptive Engine Transition Program (AETP), intended to result in an advanced engine for Block 4 of the Lockheed Martin F-35. The service will instead advance the Pratt & Whitney...
Air Force Secretary Frank Kendall said that if the development cost was lower, the Air Force may have found the space in its budget to fund the engine for its jets alone, “but at the level of several billion dollars to do that [engineering and manufacturing development], we couldn't get there.”