As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO THROTTLE WILL NOT ENGAGE. PERFORMED AUTO THROTTLE INTERACTIVE TEST INTERACTIVE TEST SHOWS ASM NR 2 FAULT 10 DEG RATE MESSAGE 22 31795 THE TORQUE TEST THE NR 1 THROTTLE WOULD MOVE FORWARD AND AFT THE NR 2 THROTTLE STAYED IN THE IDLE POSITION SUSPECT BAD NR 2 ASM. REPLACED NR 2 AUTO THROTTLE SERVO MOTOR. OPS CHECK GOOD. REF M/M 22 31 91 020 801 AND 22 31 91 400 801.