Update From WSJ this morning:
Ethiopian Airlines’ chief executive said a stall-prevention system on Boeing’s 737 MAX appears to have been activated on a jet that crashed earlier this month—the first time an aviation official familiar with the flight has specifically said that the system could have been switched on during the accident.
Mr. Gebremariam didn’t detail how he had made his determination about MCAS. He doesn’t have access to the precise detail from the data and voice recording devices, but he has listened to recorded radio communications between the cockpit of the flight and the tower at Addis Ababa airport, from which the flight departed on March 10.
“To the best of our knowledge,” MCAS was activated on the flight, Mr. Gebremariam said in the interview, adding though that he wanted to wait for the investigation for conclusive evidence.