From Seattle Times story today on United's big aircraft order:
"Separately, [United Chief Commercial Officer] Nocella gave an update about the airline’s two dozen older 777-200s that have been grounded since February after a Pratt & Whitney engine on one blew up shortly after take-off from Denver.That incident, the third instance of a hollow metal fan blade breaking off and destroying the engine, grounded all of those 777 models with the same engine worldwide.
With international passenger travel at very low levels, United hasn’t needed those planes, but hopes they will be ready for the expected upturn.
'We’re working with the FAA, Boeing and the Pratt & Whitney company to return those aircraft to service late this summer or early fall,' Nocella said. 'We think that timing lines up with the international rebound we expect later this year or next year.'”