Pratt rules out worst-case cause for F-35 blade crack: sources

Pratt & Whitney, the major manufacturer of military aircraft, has recently ruled out the most feared cause of the F-35 fan problem. This 0.6 inch crack found on a turbine has caused the grounding of 51 F-35 fighter aircraft recently ordered by the Pentagon. Fortunately, Pratt is now sure this issue does not involve high-cycle fatigue.

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Pratt rules out worst-case cause for F-35 blade crack: sources

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