As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF DURING CLIMB OUT NOTED DECREASE IN TORQUE ON LEFT ENGINE. MOVED POWER LEVER FWD AND AFT WITH NO RESULTS. TORQUE DROPPED TO 200 AND FUEL FLOW SLIGHTLY BELOW 100. SECURED ENGINE AND RETURNED TO AIRPORT AND LANDED SAFELY. FUEL CONTROL AND FUEL PUMP WERE REPLACED. ENGINE WAS GROUND RUN AND TESTED OK. AIRCRAFT RETURNED TO SERVICE.