As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT DURING CURISE THE RT ENGINE WAS SURGING. A 10 PERCENT TORQUE SURGE, CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. FOUND LOOSE PIN ON RED WIRE ON TEMP SENSOR AIR BLEED. REPINED IAW SWM 20-43-13. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.