As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3237, DURING INITIAL CLIMBOUT OF ATY, AFTER REDUCING CTST AND SELECTING CTOT SW OFF LT ENGINE TORQUE INCREASED RAPIDLY TO APPROXIMATELY 120 PERCENT TORQUE AND ITT INCREASED TO 903 C. AFTER REDUCING POWER LEVER POSITION BELOW 64 DEGREES SWITCH ENGINE REDUCED TO 40 PERCENT WHILE TROUBLE SHOOTING PROBLEM. AIR RETURN TO ATY. MAINTENANCE REPLACED LT PROP.