As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AILERON TRIM STUCK LEFT WING DOWN. TRIM WILL NOT MOVE, KEPT GETTING AP TRIM IS LWD CAUTION MSG. / REMOVED AND REPLACED AILERON/RUDDER TRIM CONTROL PANEL AND PERFORMED SATISFACTORY OPS TEST OF AILERON TRIM AND RUDDER TRIM IAW CRJ700 AMM 27-12-10-000/400-801-PSA, AMM 27-11-00-710-802, AMM 27-22-00-710-801. NO DEFECTS NOTED.