Originally Posted by
The Mad Russian
Indeed this scenario described was observed whilst 'further exploring' UPRT 'stall/upset during go-around' training. The 'quirk' or 'effect' was quite a surprise to the 3x TREs present (at least one of which had flown most 737 Variants back to the -200) in the sim on this occasion, to the extent that the scenario was flown several times to ensure what we'd witness was indeed what we'd witnessed as an effect. Later on another FSTD (same FSTD manufacture).
Interesting all same... perhaps indeed a line of code from the 737s ancestry or perhaps indeed not valid data, albeit within the flight envelope (I.E. not the wrong side of the stickshaker or with excessive bank angles etc).
Interesting experiment would be run the scenario and see if AND does work, which my understanding is that it should not due to column cutout switches. If it does the SIM has this backwards somewhere. Also to notice is whether electrical trim re-appears all at once or begins to work slowly at some point.
The sim probably does include aeroloads on the trim system, the video of pilots unable to manually trim while 2.5 out of trim suggests that it does. Also appeared to have good modelling of the 'spring' in the long control cables.
How/if these loads affect the (simulated) trim motor is an open question although it certainly could and would not need to be part of a predefined error package/scenario.