HILL: Boeing now acknowledging to the "Washington Post" that regulators have ordered the fix of a second flaw in the flight control system of its 737 MAX planes. The planes have been grounded after two fatal crashes less than five months apart. Boeing's CEO has made a statement that is actually raising more than a few eyebrows. CNN's Drew Griffin has more.</s>DREW GRIFFIN, CNN INVESTIGATIVE CORRESPONDENT (voice-over): The CEO of Boeing making a rare admission, accepting blame for two of its airliners that crashed.</s>DENNIS MUILENBURG, CEO, BOEING: It's apparent that in both flights, the Maneuvering Characteristics Augmentation System, known as MCAS, activated in response to erroneous angle-of-attack information. It's our responsibility to eliminate this risk. We own it. And we know how to do it.</s>GRIFFIN: The video message from Boeing comes after a devastating preliminary report laying out that a software issue apparently caused the crash of an Ethiopian Airlines flight last month. The report also suggesting the same issue may have caused a Lion Air flight to go down last year. The preliminary report finds the pilots did everything required to try to bring the plane back safely, but ultimately couldn't control it. Former Boeing operations analyst, Rick Ludtke, says during development of the 737 MAX, Boeing had a mandate, make sure any changes to the plane would not require additional pilot training in a simulator.
Boeing Makes Admission after 2 Deadly Plane Crashes.