As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURRING OUR DECENT WE NOTICED N1 WILL NOT REDUCE BELOW 67% ON LH ENGINE. THROTTLE LEVER DID MOVE TO FLIGHT IDLE POSITION. NO CHANGE IN N1. WAS ABLE TO INCREASE N1 WHEN COMMANDED. ********AIRCRAFT REMOVED FROM SERVICE******** R&R LH FUEL CONTROL IAW AMM 73-21-01 OPS CHECK GOOD, LEAK CHECK GOOD. GOOD TO CONTINUE SERVICE