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Airworthiness directives on B-777 aircraft updated

FAA agency intervention after fan blade failure

New official airworthiness directives of B-777/200 and 777/300 aircraft will come into force in mid-April. The US Federal Aviation Administration (FAA) announced in these days to be finalizing three safety regulations for such aircraft model equipped with Pratt & Whitney 4000 engines.

This is a mandatory safety course that will allow this type of aircraft to return to ply the American skies, after an aircraft that had just taken off from Denver airport and its engine catch fire, raining debris on surrounding cities. No one was injured and the aircraft was able to return to its home airport. However, the aviation authority had to intervene. 

The new FAA guidelines were proposed in December 2021. They come after three reported in-flight failures of the engine turbine blades, which required extensive inspections and modifications (debris guards, moisture ingress, hydraulic pump) to allow B-777s powered by those Pratt & Whitney engines to resume flights after being grounded for more than a year. 

On the same subject see also the article published by AVIONEWS.

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AVIONEWS - World Aeronautical Press Agency