Originally Posted by
meleagertoo
and didn't realise what they had done.
and didn't realise what
they MCAS had done.
Originally Posted by
meleagertoo
Neither of these accidents would be credible if postulated before the event, you'd be laughed out of town for suggesring such a thing might happen - so I'm rather sympathetic towards Boeing's stance on the trim matter. Some aspects of MCAS are another thing altogether of course, but again how could Boeing have anticipated anyone would fail to carry out necessary drills, fail to reduce power after levelling out, and fail to trim the aircraft sufficiently? They aren't psychic, no one could possibly have inagined this situation in advance so blaming them so harshly as some are doing seems to me a somewhat OTT application of 20/20 hindsight.
Agreed, before Lion Air suggesting that a new undocumented feature relying on a single sensor would have a death wish would have indeed been laughable.
Truly tragic is the CYA manner the AD was written, rather than simple and forcefull checklist for MCAS misbehave.
Would be interesting to hear why mention of the 'yo yo' technique was removed along the way.
Additional point:
A true trim runaway (stuck relay/whatever) at high speed could get into this state before the pilots recognized and cut out the trim motors, so hard to see how this is unimaginable. About 5 seconds or so appears to do the trick.