As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL APPROACH THE PILOT MADE AN ADJUSTMENT TO THE POWER LEVER WITH NO ENGINE RESPONSE. USED THE EMERGENCY POWER LEVER TO CONTROL ENGINE POWER AND LANDED. AFTER LANDING PILOT COULD NOT DUPLICATE DISCREPANCY AT RAMP BEFORE SHUTDOWN. REPLACING FUEL CONTROL UNIT FOR SUSPECTED DIAPHRAGM STICKING. TASK IN PROGRESS. FURTHER CHECKS AND TEST FLIGHT PENDING.