As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IN CRUISE, THE ENGINE EXHIBITED A 2% ROLL-BACK IN N1 SPEED WITH NO RESPONSE TO THROTTLE INPUT. FOLLOWING A DESCENT TO 10,000 FEET, THE ENGINE RECOVERED AND RESPONDED NORMALLY. THE MECHANICAL FUEL CONTROL UNIT WAS SUBSEQUENTLY REPLACED.