As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLE FAILED AND WILL NOT STAY ON. ACFT GROUNDED. PERFORMED FIM 22-31 TASK 801. CURRENT STATUS TEST PASSES. NO FAULTS. INFLIGHT FAULTS SHOWS FAULTS ON FLT LEG 9 FOR ASM 1 MESSAGE 22-31687. PERFORMED FIM 22-32 TASK 819. AUTOTHROTTLE SERVO TESTS PASSED MULTIPLE TIMES. RAN ALL INTERACTIVE TESTS PER FIM. NO FAULTS.