As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER SHUTDOWN SMOKE WAS NOTICED COMING FROM THE INTAKE AND THE EXHAUST. TROUBLESHOOTING REVEALED A FAULTY CHECK VALVE BETWEEN THE FUEL BOOSTER PUMP AND THE ECOLOGY PUMP LETTING FUEL INTO THE BURNER CAN. THE CHECK VALVE WAS REPLACED, THE ENGINE INSPECTED AND GROUND RUN SERVICEABLE.