As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HOLDING SHORT OF RUNWAY AUTOTHROTTLE INOP. WOULD NOT ENGAGE PRIOR TO TAKEOFF. ACCOMP A/T SERVO MOTOR TEST FAULTED NR 2 ASM MSG 22 31781. REPLACED NR 2 AUTOTHROTTLE SERVO MOTOR WITH SERVICABLE ONE. ACCOMP A/T SERVO MOTOR INST TEST. TEST PASS REF M/M 22 31 91 400 801.