As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, ON CLIMB OUT, TORQUE INDICATION DROPPED BELOW 1000 AIRCREW DECIDED TO RETURN TO BASE FOR MAINTENANCE. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A FAULTY TORQUE TRANSMITTER CONNECTOR TO BE THE REASON FOR AFFECTED INDICATION AFTER REPLACING INDICATOR , THE TRANSMITTER AND SIGNAL CONDITIONER. UPON PULLING BACK SHELL OFF OF THE CONNECTOR WAS FOUND CORRODED AT THE SOCKET CONNECTIONS.