As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT INOP - WITH AUTOPILOT ENGAGE FOR TAKEOFF WHEN TOGA PUSHED RIGHT THROTTLE STARTED ADVANCING LEFT DID NOT AND AUTOPILOT DISENGAGED - SAME THING HAPPENED WHEN TRYING IT AGAIN AT ALTITUDE. GROUNDED - YES. PERFORMED AUTOTHROTTLE BITE REF FIM 22-31 TASK 801. UNDER INFLIGHT FAULTS ON LEG 16 FOUND MAINT. MESSAGE 22-31687 ASM 1 RATE MONITOR FAULT. REF FIM 22-32 TASK 819 PERFORMED INITIAL EVALUATION AUTOTHROTTLE SERVO MOTOR TEST. NO FAULTS FOUND. TEST PASS.