As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN THE FLIGHT CREW REDUCED POWER ON FINAL APPROACH, NR 1 ENGINE FAILED TO RESPOND TO POWER LEVEL INPUT, AND REMAINED AT 15 LBS TORQUE. THE TORQUE THEN SLOWLY DROPPED TO IDLE WITHOUT ANY POWER LEVER INPUT AND A LANDING WAS COMPLETED WITHOUTFURTHER INCIDENT. INVESTIGATION REVEALED THAT THE F.C.U. HAD FAILED INTERNALLY.