but, it didn't seem to be noticed by the Turkish crew, or indeed the Thomson crew in BOH
I thought that we shouldn't make any comparison with these incidents/accidents
The Turkish auto-throttle induced accident resulted in the following Boeing guidelines for non-normal situations:
NON-NORMAL RECOGNITION:
o The crewmember recognizing the malfunction calls it out clearly and
precisely.
• MAINTAIN AIRPLANE CONTROL:
o It is mandatory that the Pilot Flying (PF) fly the airplane.
• ANALYZE THE SITUATION:
o Any further action should only be initiated after the malfunctioning
system has been positively identified.
Link:
Flight Crew Monitoring During Automatic Flight
It also says:
Early intervention prevents unsatisfactory airplane performance or a degraded flight path.When the automatic systems as described above do not perform as expected, the PF should reduce the level of automation to ensure proper control of the airplane is maintained.
The application of these recommendations also prevents trim induced issues. AT and AP are quite interdependent systems and the second one will definitely be affected by issues related to the first one.
Keeping one system without the other can be tricky.