Boeing recommends suspending flying with PW4000-engined B777s

After the engine failure on 20 February of United Airlines' N772UA, the FAA has issued an emergency directive that requires airlines that operate B777s with the Pratt & Whitney PW4000-engine to immediately or step-up inspections of the engines. As a result of the FAA-directive, Boeing has recommended airlines to suspend operations until the inspections have been done and the aircraft has been cleared fit for duty.

There are 69 B777s with these engines in service, while there are 59 of them in storage. The breakdown is currently looking like this:

• AAR Corporation: 1 stored
• AerCapa: 2 stored
• All Nippon Airways: 11 flying, 11 stored
• Asiana Airlines: 7 flying, 2 stored
• Boeing Capital Corporation: 1 stored
• Egyptair: 4 stored
• Japan Airlines: 9 flying, 4 stored
• Jet Midwest: 2 stored
• Jin Air: 4 flying
• Korean Air: 7 flying, 9 stored
• Ukraine International Airlines: 1 stored
• United Airlines: 24 flying, 28 stored

The PW4000-engine has been availble for the initial B777-200, the -200ER and the -300. The incident looks very similar to an incident in 2018 when another United Airlines B777-200 had an uncontained engine failure on approach to Honolulu (HI).