4 ms·
Runaway stabilizer causes a more dramatic sudden movement than MCAS. MCAS's start, wait 5 seconds, re-start, motion is more gradual. For example you could look
by Someone1234 8y ago
Runaway stabilizer causes a more dramatic sudden movement than MCAS. MCAS's start, wait 5 seconds, re-start, motion is more gradual. For example you could look at the wheel and it has stopped, only to re-start after you look away (add noise cancelling Bose headphones and you may not hear it)
Pilots are trained well for runaway stabilizer, MCAS was essentially the same thing, but it didn't FEEL like the same thing, so a stressed pilot's mind may not immediately go to that solution/memory item.
- phire 8y agoBasically, the pilots would get more and more confused as their plane went more and more out of trim. Now things are starting to make sense. Boeing claimed (and F.A.A agreed) that pilots didn't need training because they already had training for a memory procedure which would have solved the issue. They both appear to have overlooked is the MCAS symptoms were sufficiently different to the runaway stabiliser scenarios pilots trained on, that pilots are having problems knowing which procedure to apply.
- _ph_ 8y agoThat might be the ultimate answer to why the accidents did happen. That while pilots should be well trained to deal with runaway stabilizers, they didn't recognize the situation in time (which probably was extremely short with the second crash). Which can only be explained that the way the events unfolded, distracted the pilots from dealing with a runaway stabilizer. The third man might just have not been "distracted" by piloting the airplane and thus could see it. Besides obviously making the sensors used by MCAS truely redundant and limiting its extreme behavior of moving the trim up to the stops, a large part of fixing the MAX might be just having a big warning light for MCAS operating.