When a Boeing 777’s engine cover broke apart and rained parts on a Denver suburb on Feb. 20, the news rang familiar to Christopher Behnam. In February 2018, the 777 he was piloting as captain suffered a similar emergency with the same engine type.
His plane, United Airlines Flight 1175 to Honolulu, was over the ocean 120 miles from the runway carrying more than 370 passengers and crew when a violent blast rocked it.
The jet shook uncontrollably, rolled sharply, and the noise was deafening, said Capt. Behnam. An engine had suffered severe damage. Years of training kicked in, the pilots regained control and shut the engine down. Even so, the plane was hard to handle. A third pilot went into the cabin and looked out the window: The engine hadn’t just failed; its cover had ripped away.
“After the explosion, it felt like she was going to fall apart,” Capt. Behnam said. “I knew I could fly the airplane. The issue was, can I fly it long enough to land it?” The pilots brought the plane to a safe landing in Hawaii.
The National Transportation Safety Board, which investigates U.S. aviation failures, concluded that a roughly 35-pound fan blade broke in the plane’s Pratt & Whitney PW4000 engine due to fatigue, spiraling forward and causing parts of the engine cover to drop into the sea.