Re Boeing Comment, Flight Global, #1753
A somewhat disingenuous response from Boeing, typical of an attempt to downplay the validity of a formal report and offload responsibility to operators and crew (cf 737 AMS report Annex B).
The comments about AoA vanes are irrelevant, because even with the changed part the problem remained. Are there differences between new and refurbished parts? Does the Max use a different version? Do operators know?
Boeing introduces MCAS into the situation as though it were a known feature. Then refers to the runaway trim drill as though this advice should have been ‘deduced’ as relating to MCAS, but that information was only published after the accident.
Pilots did not know about MCAS; did the engineers, is there any specific trouble shooting guide for multiple disagree messages and trim problems, and relating this to MCAS?
There is no reference to a tech fault log for ‘MCAS FAULT’ as there are for Speed Trim, or Mach Trim; does such a parameter exist?