As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM MDT, THE CREW EXPERIENCED A NR 2 ENGINE TORQUE FLUCTUATION ASSOCIATED WITH A PROPELLER RPM FLUCTUATION, OIL PRESSURE REMAINED NORMAL. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE NR 2 PROP CONTROL UNIT AT FAULT. REMOVED AND REPLACED THE NR 2 PCU, TEST FLEW AIRCRAFT SATISFACTORILY.