Boeing did not adequately consider pilot reactions in 737 MAX: NTSB

WASHINGTON: Boeing Co failed to adequately consider how pilots respond to cockpit emergencies in its 737 MAX safety assessment and may need to make changes to flight deck alerts, pilot procedures and training, the National Transportation Safety Board said.

Boeing has said the feeding of erroneous Angle of Attack data to a system called MCAS that pushed the planes lower was a common link in two wider chains of events leading to the crashes. MCAS stands for Maneuvering Characteristics Augmentation System. US House of Representatives Transportation Committee chairman Peter DeFazio said on Thursday that the NTSB report suggests Boeing"may not have made realistic assumptions about how pilots respond to multiple simultaneous and potentially confusing warnings in emergency situations."

Boeing said in a statement it is"committed to working with the FAA in reviewing the NTSB recommendations."The NTSB said the FAA should address assumptions Boeing and other manufacturers make in designing software systems to react to emergencies, and whether the systems should be revised to account for varying pilot reactions to cockpit alarms and alerts.

FAA Deputy Administrator Dan Elwell said on Wednesday at a congressional hearing that if the AOA sensors differ by 5.5 degrees or more then MCAS cannot operate. If MCAS does operate it can only operate once unless the problem had been"completely resolved," he added.

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