As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT CREW REPORTED ENGINE SPEED GOING TO -3 PERCENT WITH AN ASSOCIATED AIRCRAFT YAW. THE TORQUE BRIDGES WERE SWAPPED AND UNDERSPEED FUEL CONTROL ADJUSTED. A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED AND AIRCRAFT WAS RETURNED TO SERVICE.