Internal messages between two Boeing pilots appear to show the company knew about problems with an automated system in the 737 Max aircraft in 2016, two years before two separate crashes involving the Max killed 346 people.
In a document obtained by ABC News, Boeing's chief technical pilot, Mark Forkner, told a colleague that the plane's MCAS system was"running rampant in the sim on me." Forkner said in the messages that in the simulation the MCAS was"trimming itself craxy," likely meaning"crazy," and that it was"egregious." News of the internal messages was reported earlier by The New York Times.
The maneuvering characteristics augmentation system, or MCAS, is an automated flight control system designed to change the angle of an airplane to prevent a stall. Faulty MCAS systems are believed to have caused the Lion Air crash in Indonesia, which killed 189 last October, and the Ethiopian Air disaster in March that killed 157.
The FAA obtained the messages last night in a document from Boeing, and FAA Administrator Steve Dickson sent a letter to Boeing CEO Dennis Muilenburg requesting an immediate explanation. Dickson also requested an explanation about the delay in disclosing the document to the FAA because it was his understanding that"Boeing discovered the document in its files months ago.
Peter DeFazio, D-Ore., chair of the House Transportation committee, said in a statement that the conversation between Boeing employees is"shocking, but disturbingly consistent with what we've seen so far in our ongoing investigation of the 737 Max, especially with regard to production pressures and a lack of candor with regulators and customers.
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