[ProtectOurFreedom]

When the AoA sensor fluctuates from 11 degrees to 75 degrees in less than 3/4 second, anybody up front should immediately KNOW that was a faulty sensor. You don't need a "Disagree Alert" alarm to tell you the left AoA sensor is faulty, probably from a bird strike.

[HiTech RedNeck]

Why AoA sensors at all... if they are vulnerable to collisions with objects. Why not a gyroscopic instrument.

[FtrPilot]

When the AoA sensor fluctuates from 11 degrees to 75 degrees in less than 3/4 second, anybody up front should immediately KNOW that was a faulty sensor.

Problem was there were no AOA gage display on the PFDs and no AOA Disagree alert. The only indication in the cockpit is the left stick shaker activation and the voice warning is yelling "Stall".

The proposed fix, in flight test, will fix the problem.

Here's what I don't understand...75° AoA is impossible to achieve in an airliner. At the speeds the aircraft was flying, 75° AoA would rip the wings off. Boeing could have easily included logic in the original MCAS software to disregard impossible AoA. Any AoA above 25° would be rejected and the other AoA sensor would be used.

Boeing made some stupid decisions in development and delivery of the MAX. I hope the guilty individuals are punished appropriately.

[Yo-Yo]

When the AoA sensor fluctuates from 11 degrees to 75 degrees in less than 3/4 second, anybody up front should immediately KNOW that was a faulty sensor. You don't need a "Disagree Alert" alarm to tell you the left AoA sensor is faulty, probably from a bird strike.

But if the airline didn't buy the AOA Indicator option, there IS NO DISPLAY OF ANGLE OF ATTACK ON THE FLIGHT DISPLAY.

How exactly is the pilot supposed to know that the AoA sensor fluctuated from 11 degrees to 75 degrees if there is no display of that information?

And for the record, the display of angle of attack is not required for safe operation of the aircraft. Many aircraft do not display that information, yet still have AoA sensors and use that information to warn of impending stall by operating a 'stick shaker.'