The head of the Federal Aviation Administration said on Sunday that he was requiring “immediate or stepped-up inspections” of all Boeing 777 planes equipped with a particular Pratt Whitney engine model one day after the jet suffered a dramatic engine failure over Colorado.
Also on Sunday, United Airlines, the only American carrier affected by the F.A.A. order, said it was temporarily grounding the 24 Boeing 777 planes currently in use in its fleet with the Pratt Whitney engines.
The F.A.A. announcement came shortly after its counterpart in Japan ordered airlines there to stop flying the plane, affecting 32 jets operated by All Nippon Airways and Japan Airways. Both the Japanese and American orders apply only to Boeing 777s equipped with Pratt Whitney PW4000 engines.
“We reviewed all available safety data following yesterday’s incident,” the F.A.A. administrator, Steve Dickson, said in a statement. “Based on the initial information, we concluded that the inspection interval should be stepped up for the hollow fan blades that are unique to this model of engine, used solely on Boeing 777 airplanes.”