As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT, NO THROTTLE RESPONSE WITH AUTO THROTTLES ON. AUTO THROTTLE SWITCHED OFF, NO THROTTLE RESPONSE IN MANUAL, FLX OR CLIMB. APPLIED T/O G/A POWER AND GOT THROTTLE RESPONSE- BOTH ENGINES. *S/D* ENGINES TESTED AT HI-PWR. AFS AND LAND TEST PER MM 22-97-00 ACCOMPLISHED WITH NO FAULTS DETECTED. AIRCRAFT RETURNED TO SERVICE. TO DATE (9/25/98) NO MORE AUTO THROTTLE PROBLEMS HAVE HAPPEDNED.