As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLE WOULD NOT ENGAGE. ACFT GROUNDED. LOGGED FAULT 22-31688 ASM-2 FAILURE. AUTOTHROTTLE OPS TESTED GOOD IAW FIM 22-32 TASK 819. UNABLE TO DUPLICATE DISCREPANCY. NO FAULTS LOGGED IN HGS OR DFCS FAULT HISTORY. RAN SERVO MOTOR TEST AND TORQUE TEST SEVERAL TIMES WITH NO DISCREPANCIES NOTED. REPLACED ASM-2. GROUND VERIFICATION GOOD IAW AMM 22-31-91.