As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TPA - FLT 632 - AUTO PILOT IS VERY SLOW TO TRIM DURING LEVEL OFFS AND WITH SPEED CHANGE. AUTO PILOT TRIM COMPARATOR LIGHT ILLUMINATES AND A/P WON'T ALWAYS CAPTURE ALTITUDE. BOTH DFGS 1 AND 2 DO THE SAME. REMOVED AND REPLACED DUPLEX ELEVATOR SERVO DRIVE WITH SERVICEABLE UNIT. RAN RIGHTS CHECK ON NR 1 AND NR 2 SYSTEMS, BOTH SIDES GO. (M)