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For questions related to Boeing's Maneuvering Characteristics Augmentation System (MCAS).
31 questions
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What was the main pilot action assumption from Boeing regarding uncommanded MCAS on 737 MAX 8?
Something bothers me regarding MCAS issue on 737 MAX 8 after reading the final report.
Based on the answer on this question, this, the MCAS can be overridden using the manual electric trim. However, ...
7
votes
2
answers
890
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Do pilots still not need additional simulator training to fly the 737 MAX?
Boeing added the MCAS system to the 737 MAX so pilots didn't have to go through expensive simulator training to get used to the changed flight profile caused by the engine redesign. Do pilots still ...
0
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2
answers
2k
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Could the pilots really not trim manually to overcome MCAS, as shown in the Netflix Downfall documentary?
In the recent Netflix documentary, a claim is made that once MCAS activated, after several activations, the pilots physically could not trim the aircraft due to the speed and pitch.
Is this true? I ...
0
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2
answers
1k
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Would fitting a T-tail on the 737 Max make MCAS unnecessary?
This is pretty far out, so I just pose it as a question for notion or ideas, rather than conclusive answers.
Considering the differences in flight characteristics between the Boeing 737 Max-8 and ...
1
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2
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253
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What is MCAS' purpose? [duplicate]
In a recent question, one of the answers states:
MCAS has nothing whatsoever to do with stall recovery or stall behaviour.
It was implemented strictly to make the MAX's pitch stick force response in ...
2
votes
1
answer
198
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I have an idea about how to resolve a conflict between the pilots and an automated flight control system. Does it make sense? [closed]
I am thinking about the 737-MAX crashes. There is a similar question at Is it common for automated control systems to use non-redundant sensors? There was an article in yesterday's Seattle Times In ...
-3
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1
answer
4k
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What programming language(s) is Boeing's MCAS written in?
What language is Boeing's MCAS written in?
Thanks
2
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1
answer
415
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On the 737 MAX, can the pilots switch to the backup MCAS, or switch active MCAS input to another AoA probe during flight?
According to this article, my assumptions about the Boeing 737 MAX flight control system are (please correct me if I am wrong):
The aircraft has two flight control computers (FCC)
The aircraft has two ...
5
votes
2
answers
3k
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Why does the KC-46 use two sensors for MCAS when the 737 Max doesn’t?
this article states
The KC-46 has a two-sensor MCAS system, which “compares the two readings,” the Air Force said.
I’m aware that the 737 uses two sensors and always has, but the computer reads ...
1
vote
1
answer
236
views
How does MCAS communicate with other systems to know if the flaps are retracted or not?
How exactly does MCAS communicate with the flaps setting to know if the flaps have been retracted?
I just noticed on the preliminary report for ET302, the flaps were set at 5 degrees. It doesn’t say ...
7
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3
answers
1k
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Did Boeing need MCAS because the 737 MAX didn’t meet FAA longitudinal stability requirements, or was it to make the MAX feel like the NG?
I’m confused on this. I’ve read in multiple different places that
MCAS was required due to the easier stick forces at a high angle of attack and a high G force, and because of this, the Max didn’t ...
4
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3
answers
1k
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Will the 737 Max 10 have MCAS?
With the fuselage plugs forward of the wing, would this mean the engines are closer to CG, therefore no need for MCAS?
1
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0
answers
975
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Why does the KC-46 use an MCAS?
The KC-46 tanker aircraft (the U.S. military's designation for the 767s it uses as tankers, and which every other country calls the KC-767) uses an early version of an MCAS.1 This was ostensibly ...
8
votes
1
answer
1k
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Why does the MCAS use the horizontal stabiliser rather than the elevators?
The Maneuvering Characteristics Augmentation System (MCAS), found, in two slightly-different variants, on the 737 MAX and KC-46, provides nose-down pitch inputs in certain very-high-angle-of-attack ...
3
votes
1
answer
645
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Why couldn’t Boeing just use the stab trim system to do MCAS job?
If I’m incorrect in the question, please correct me. From what I’ve read and gathered the stab trim system essentially did the same before hand? It relies on AoA? And if so, did the computer for that ...