As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS IDLE ON DECENT AND 10 PERCENT SPLIT-ENG N1. APPROACH: LEFT IDLE APPEARS HIGH. MATCHED WITH GEAR DOWN. MAINTENANCE REPORTS IAW TSM 73-00-00-810-872, REMOVED AND REPLACED FLSCU FIN# 7QJ, BITE TEST FAILED. OPERATIONAL CHECK OF IDLE AT GATE NOW GOOD IAW AMM 28-46-34-400.