jm + 737max   2

Flawed analysis, failed oversight: How Boeing, FAA certified the suspect 737 MAX flight control system
omg this article is absolutely horrific. Boeing are in deep shit if this is borne out.
Like all 737s, the MAX actually has two of the sensors, one on each side of the fuselage near the cockpit. But the MCAS was designed to take a reading from only one of them.

Lemme said Boeing could have designed the system to compare the readings from the two vanes, which would have indicated if one of them was way off. Alternatively, the system could have been designed to check that the angle-of-attack reading was accurate while the plane was taxiing on the ground before takeoff, when the angle of attack should read zero.

“They could have designed a two-channel system. Or they could have tested the value of angle of attack on the ground,” said Lemme. “I don’t know why they didn’t.”

The black box data provided in the preliminary investigation report shows that readings from the two sensors differed by some 20 degrees not only throughout the flight but also while the airplane taxied on the ground before takeoff.
faa  aviation  boeing  737max  safety  fail  sensors  flight  crashes  mcas 
3 days ago by jm
Several Boeing 737 Max 8 pilots in U.S. complained about suspected safety flaw | Airlines | Dallas News
'one captain calling the flight manual "inadequate and almost criminally insufficient"'

'The disclosures found by The News reference problems during Boeing 737 Max 8 flights with an autopilot system, and they were all during takeoff and nose-down situations while trying to gain altitude.'
boeing  planes  safety  autopilots  737max 
8 days ago by jm

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