As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE DIFFICULT TO START WHEN HOT. INSPECTED FOUND BAD IMPULSE COUPLING. MAINTENANCE COMPLETED. THIS MAG FAILURE OCCURS WELL DESCRIBED MAGNETO OVERHAUL/500 HOUR INSPECTION TIMES. THE LT IMPULSE MAGNETO IS EQUIPPED WITH AN IMPULSE COUPLING THAT IS USED FOR THE START OF THE ENGINE.