Originally Posted by
Maninthebar
The KNKT report states that Boeing did test MCAS misfire in the sim, but without any associated cause and therefore without the warnings and other symptoms associated with whatever triggered MCAS in any real world case. It is not clear from the report whether those operating (flying) the sim were aware of MCAS in advance. On the basis of their testing Boeing assessed the risk of unintended MCAS operation to be controlled.
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.