Well, I did quote the "classic" manual, which I suspect might be relevant since the crashed bird was -500, but I can do it for NG too:
Originally Posted by Boeing
The speed trim system (STS) is a speed stability augmentation system designed to
improve flight characteristics during operations with a low gross weight, aft center
of gravity and high thrust when the autopilot is not engaged. The purpose of the
STS is to return the airplane to a trimmed speed by commanding the stabilizer in
a direction opposite the speed change. The STS monitors inputs of stabilizer
position, thrust lever position, airspeed and vertical speed and then trims the
stabilizer using the autopilot stabilizer trim. As the airplane speed increases or
decreases from the trimmed speed, the stabilizer is commanded in the direction to
return the airplane to the trimmed speed. This increases control column forces to
force the airplane to return to the trimmed speed. As the airplane returns to the
trimmed speed, the STS commanded stabilizer movement is removed.
STS operates most frequently during takeoffs, climb and go-arounds. Conditions
for speed trim operation are listed below:
• STS Mach gain is fully enabled
between 100 KIAS and Mach
0.60 with a fadeout to zero by
Mach 0.68
• 10 seconds after takeoff
• 5 seconds following release of
trim switches
• Autopilot not engaged
• Sensing of trim requirement
Anyway, while individual aircraft equipment might differ, MAK was pretty explicit that the STS did activate during go-around.
Edit:
Originally Posted by DOVES
Add to this:
shortly thereafter:
Stick Shaker activation and "STALL - STALL - STALL - ...
What occurrence are you referring to?