Autopilot or Flight Instrument Failure
Perhaps someone smarter than I (and there must be literally scores of you out there) explain how the DFDR and CVR interpreters might have lamped upon it being an auto-pilot failure to engage rather than an across-the-board CRT failure or a singular ADI failure.
What would or could have been the confirmatory clue (or did they not consider a flawed attitude instrument as a possibility?). If the autopilot didn't engage, is a classic 737 going to go clack-clack?
In any configuration (in a non-upgraded classic 737) is the autopilot's vertical gyro going to be the same source of attitude info as used by one of the pilot's ADI's?
Don't know, just asking.