AD-2021-00830-E Pratt & Whitney Division PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan engines; 1st-stage low-pressure compressor (LPC) blades
🏛 Federal Aviation Administration (FAA)FAA-2021-0959
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