737 MAX / NTSB

[discntnt_irny_srcsm]

https://www.businessinsider.com/737-max-ntsb-pilots-report-behavior-faa-2019-9
In a report issuing seven new safety recommendations to the FAA, the NTSB noted that a major contributor to the crashes was that pilots reacted differently to multiple alarms and alert indications than Boeing and the FAA assumed they would.

"We saw in these two accidents that the crews did not react in the ways Boeing and the FAA assumed they would," NTSB Chairman Robert Sumwalt said. "Those assumptions were used in the design of the airplane and we have found a gap between the assumptions used to certify the Max and the real-world experiences of these crews, where pilots were faced with multiple alarms and alerts at the same time."

...

Although Boeing proved to the FAA during certification test flights that MCAS could be disabled safely should it unintentionally activate, the NTSB report says that the test scenarios — which met FAA requirements — did not reflect the real-world scenario of multiple conflicting and confusing alarms, and did not account for the fact that that scenario could lead to pilots responding and behaving differently.

...

The report also suggests that the underlying assumptions by the FAA and Boeing didn't consider the effects of multiple compounding alarms, which the pilots experienced due to the faulty sensor.

[Sherman A1]

1. The MCAS would be unnecessary

if the damn design were more stable. This is fundamentally an engineering and design issue that changed the Center of Gravity with the new more efficient engines being installed to compete with Airbus with a 737 design stretched beyond what it is capable of doing. The MCAS and the rest of the corner cutting patches is a bandaid and apparently not a very effective one.

These aircraft should be scrapped.

[cpamomfromtexas]

2. The FAA let Boeing take out info on MCAS out of manual