Originally Posted by
Jo90
Having read (well skimmed) the interim report of the Lion accident particularly the part relating to the previous flight, it occurs to me that following a flight with major instrument discrepancies, continuous stick shaker and multiple uncommanded stab trim movements it might have been appropriate to add something to the tech log entries like "aircraft unfit for revenue flight pending maintenance action".
Would that have prevented the accident?
Maybe, maybe not. Remember, they did log uncommanded trim movements ("STS trimming wrong" - remember they had no knowledge of MCAS even existing) and maintenance action
was taken before the last flight - it just didn't find or fix the real problem.
Also, even if it had prevented
that accident, it wouldn't prevent one where the first crew that hits the problem cannot cope with it (and ET may well be that).
When trying to pin blame on crews, airlines, maintenance remember that the 737 MAX is a new variant of an existing type (lets restrict to the NG for comparison), same type certificate, same type rating, so similar that the only pilot training is apparently a powerpoint.
NG: ~7000 in service, 16 losses in >20 yrs
MAX: ~ 350 in service, 2 losses in <3 yrs
- same crews
- same training (modulo the powerpoint)
- same airlines
- same maintenance
- same procedures
MAX simply crashes more often, and there's a pattern (shortly after takeoff, flight control problems reported, uncontrolled dive). Even
without any knowledge of MCAS you would have to say that there is something wrong with this aircraft and that it's something in the changes from the NG.