WASHINGTON, Sept 8 (Reuters) - The National Transportation Safety Board said Friday the February 2021 engine failure on a United Airlines Boeing 777 in Colorado was due to a crack in a fan blade and cited inadequate inspections as a contributing cause.
In February 2021, the Federal Aviation Administration ordered immediate inspections of 777 aircraft with Pratt & Whitney 4000 engines before further flights following the incident, which led to the planes' grounding for more than a year.
The NTSB cited "the inadequate inspection of the blades, which failed to identify low-level indications of cracking, and the insufficient frequency of the manufacturer’s inspection intervals." Pratt & Whitney is a unit of RTX. (Reporting by David Shepardson; editing by Jonathan Oatis)
