As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SBA - AT 14,000 FT, LEFT ENGINE TORQUE DROPPED TO ZERO AND T6 DROPPED TO 200-300 DEGREES. CREW SHUT DOWN ENGINE AND RETURNED TO THE STATION WITHOUT INCIDENT. MAINTENANCE REPLACED LEFT ENGINE HMU. OPERATIONAL CHECK SATISFACTORY. AIRCRAFT RETURNED TO SERVICE. (M)