In this file photo the Boeing regional headquarters is seen amid the coronavirus pandemic on April 29, 2020, in Arlington, Virginia. /AFP

CHICAGO, Feb. 21 (Xinhua) -- U.S. aircraft manufacturer Boeing said in a statement on Sunday that it recommended suspending operations of its 777 airplanes equipped with Pratt & Whitney 4000-112 engines until the Federal Aviation Administration identifies the appropriate inspection protocol.

A Boeing 777-200 flight from the United Airlines made an emergency landing at Denver International Airport on Saturday after the right engine suffered a failure and exploded mid-flight.