Originally Posted by
Fly Aiprt
Don't have the reports at hand right now, but I seem to remember they replaced the MCAS 'misfire' with just running the trim at the rate the MCAS was supposed to.
Hence hardly an actual 'misfire' test, rather just a plain runaway trim event.
But I may be wrong.
My reading of it is that Boeing carried out the tests, first on the low speed (high mach) version, found these to be manageable and then reassessed for the high speed (low mach) version. In each case this was done without any associated failures so, yes, it would resemble runaway trim.
KNKT analysis points out that no simulation was carried out as to the outcome on crew effectiveness if MCAS was once allowed to run to its maximum 2.5 deg maximum