Fire damage to the inboard side of the right engine, a PW4077, from the Feb. 20, 2021, United Airlines flight 328 engine failure event.
Credit: NTSB
Pratt & Whitney’s changes to its 112-in. engines to address fan blade failure risks revealed in three in-service incidents will not require a key certification test to demonstrate compliance with an FAA rule, but the manufacturer must show the new design meets the rule’s requirements, the agency...
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