As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STABILISER TRIM RUNAWAY DURING GO-AROUND. TRIM STUCK NOSE DOWN. QRH COMPLETED, LANDED FLAPS 20. (FLIGHT 4780 - FILED OPEN)TROUBLE SHOT HORIZONTAL STAB TRIM RUNAWAY IN REFERENCE TO CRJ550 FIM 27-40-00. FAULT COULD NOT BE DUPLICATED. NO FAULT CODE STORED IN MDC. REMOVED AND REPLACED BOTH LH AND RH HORIZONTAL STAB TRIM SWITCHES IN REFERENCE TO CRJ550 AMM 27-41-05. OPS CHECK GOOD.