
Pentagon chief arms buyer Frank Kendall told reporters that the US military was close to determining the root cause of a major engine failure in June, and test fixtures were being set up to ensure that Pratt's proposed corrective actions were acceptable and adequate.
The failure of Pratt & Whitney's F135 engine grounded the entire F-35 fleet for several weeks this summer and prevented the newest and most advanced US warplane from making its international debut at two UK air shows. Flights have resumed but with certain restrictions on speed and other manoeuvres.
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