As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA- FLT 4856 - CREW REPORTED A DUAL PITCH TRIM FAIL ON DESCENT. AUTOPILOT WAS ON AND DID NOT TOUCH ANYTHING. RECEIVED FAILURE OF MAIN AND BACK UP PITCH TRIM AND 16000 FT. AFTER LANDING CYCLED C/B AND FAILURE WENT AWAY. MAINTENANCE REMOVED AND REPLACED THE HORIZONTAL STABILIZER CONTROL UNIT IAW EMB MM. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)