As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO THROTTLES DISENGAGED AND WILL NOT RE ENGAGE. ACFT GROUNDED. LAST FAULT LEG FAULTED ASM 1 SEVERAL TIMES. PERFORMED AUTOTHROTTLE SERVO TEST ASM 1 FAILS THROTTLE NR 1 DOES NOT MOVE. VERIFIED DISCREPANCY. REPLACED NR 1 ASM. OPS NORMAL. REF MM 22 31 91. SERVO MOTOR TEST GOOD REF MM 22 31 00.