As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NR1 ENGINE RUNNING ROUGH IN CRUISE. PRECAUTIONARY SHUTDOWN CARRIED OUT. POST FLIGHT INSPECTION FOUND THE POINTS BURNT AND NOT OPENING. THE MAGNETO WAS REPLACED. DISASSEMBLY OF THE MAGNETO FOUND BOTH BEARINGS WORN, WORN BEARINGS OVERHEATED CAUSING POINT RUB REDUCING GAP.