As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TORQUE ON LEFT ENGINE FLUCTUATED AND THEN DROPPED OFF TO 26 PERCENT TORQUE ACCOMPANIED BY FUEL FLOW FLUCTUATION. PERFORMED PRECAUTIONARY ENGINE SHUTDOWN. RETURNED TO SLC. REMOVED AND REPLACED LEFT ENGINE HMU IAW RII 73-301 AND MM 73-21-00. OPS CHECKS GOOD.