As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT OF FLIGHT 2907, RT ENGINE SURGED DURING CLIMB. TORQUE WENT TO 120 PERCENT FOR 10 SECONDS, TEMP WENT TO 968 DEGREES FOR 10 SECONDS. PROP RPM REMAINED STABLE. CTOT WAS OFF, AUTO COARSEN OFF, AUTO PILOT ON. PILOT WENT TO TORQUE MOTOR LOCK OUT PER QR HAND ENGINE PARAMETERS STABILIZED. AIR RETURN TO DTW. MAINTENANCE REPLACED RT PROP ASSEMBLY. REPLACED DEC IAW GE-MM 72-00-00. ALL CHECKS GOOD.