As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CUSTOMER REPORTED THAT ON DESCENT BOTH ENGINES TORQUE FLUCTUATING BETWEEN 20 PERCENT -7 PERCENT WHILE OTHER ENGINE PARAMETERS WERE SAID TO BE STABLE. EVENT LASTED APPROXIMATELY 3 MINUTES AND THE ACFT WAS REPORTED TO BE, FISH TAILING, DURING THAT EVENT. THE ACFT LANDED SAFELY. FIELD SERVICE REP. IS TROUBLESHOOTING WITH THE CUSTOMER.