Use of QAR data in maintenance
This question came to mind from the Lion air 737 MAX/MCAS sequence where a faulty AOA sensor caused problems on the penultimate flight but the AOA sensor was not considered since the problems were logged as air speed disagree and 'sts running backward' with no mention of the continuous stick shaker on takeoff.
The maintenance performed did not fix the root cause and the crew of fatal flight were not as lucky.
1: Would the raw AOA readings (one was high by 20 degrees) and/or stick shaker activation be in QAR data.
2: Is QAR data routinely used as an aid in diagnosis, are there tools to make this available for line maintenance?
As a HW/SW engineer I find having logs of raw data is invaluable compared to relying on user reports that often attempt to diagnose rather than report symptoms as clearly as possible.