As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG STAB TRIM DISPLAYED, & STAB TRIM LIGHT ILLUMINATED. STABILIZER TRIM OPERATES AT ONE-HALF SPEED. CREW COMMENTS: COMES ON INTERMITTENTLY WHEN TRIMMING WITH CONT WHEEL OR PEDESTAL. WITH STAB IN NEUTRAL, STAB L/E UP LIMIT SW WITH FLAPS RETRACTED AT M519 SHOWS OPEN, AT M520 AND M521 SHOWS CLOSED, MOVED STAB FULL NOSE DOWN (L/E UP) AND M520 AND M521 L/E UP LIMIT OPENED, REPLACED AND ADJ M519. OPERATIONAL TEST NORMAL.