Boeing Proposes Phase-In Of 777 Nacelle Modifications

United Airlines flight 328 engine failure
Credit: NTSB
Boeing is developing a series of nacelle improvements for grounded Pratt & Whitney PW4000-powered 777s and wants FAA’s blessing to phase them in as they are finalized, instead of delivering a complete, compliant nacelle structure as required by the agency’s certification rules. In a petition to the...

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