As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA CREW REPORTED A & B AUTO THROTTLE INOPERATIVE & SPEED TRIM LIGHT ILLUMINATED DURING FLIGHT. FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED FLIGHT CONTROL COMPUTER A. SYSTEM GROUND CHECKED NORMAL. OPERATION (CLOSED).