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Ethiopian Airlines 302

Printed page 255. PDF page 255.

training, it would have significantly altered the outcome. 3.2Probable cause of the accident Repetitive and uncommanded airplane-nose-down inputs from the MCAS due to erroneous AOA input, and its unrecoverable activation system which made the airplane dive with the rate of
Open final report at PDF page 255Aircraft Accident Investigation Report B737 MAX 8, ET-AVJ

Ethiopian Airlines 302

Printed page 242. PDF page 242.

also the low speed Maximum limit of 2.5� of stabilizer movement and Boeing did not test repetitive erroneous MCAS activations in a flight simulation, but did consider the possibility of an erroneous AOA sensor potentially leading to repeated MCAS activations.
Open final report at PDF page 242Aircraft Accident Investigation Report B737 MAX 8, ET-AVJ

Ethiopian Airlines 302

Printed page 252. PDF page 252.

considered MCAS activation could occur as a result of erroneous AOA but did not test repetitive erroneous MCAS activations in a flight simulation; 69. When Uncommanded MCAS function was considered "Major," Boeing did not perform a specific fault tree analysis
Open final report at PDF page 252Aircraft Accident Investigation Report B737 MAX 8, ET-AVJ