737, Sorry, but I am not in agreement here. I understand you are a pilot, and so are many of us. The parameters and the if/then scenario have never been properly detailed. We would not have 3 incidents and 2 crashes if it had been.
While MCAS is part of the Speed Trim System (STS), the parameters appear completely different.
I know the Boeing ac, but are not current like I am on Airbus ac..
From what I have seen on the STS system, STS Mach gain is fully enabled between 100 KIAS and Mach 0.60 with a fadeout to zero by Mach 0.68. 10 seconds after takeoff, 5 seconds following release of trim switches, and Autopilot not engaged.
IF STS utilizes AoA , then why was MCAS required?
What are the parameters that engage MCAS?
I really do not agree with 2 AoA sensors, and the pilot is not the 3rd sensor, especially if there is only one left for whatever reason (as in the Ethiopian crash). As I have stated before, the AoA's are always in disagreement in many conditions, such as climbout and short final ,and while you claim the pilot has a decision, well, where or what is that decision based?
Lose 1 out of 2 sensors, and what is your decision based on?
Those AoA vanes always have issues and you know it.
Last edited by Smythe; 11th May 2019 at 01:44.