As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT EXPERIENCED LOSS OF ENGINE POWER IN FLIGHT. EMERGENCY NO POWER LA NDING CARRRIED OUT IN FIELD. AIRCRAFT REMOVED FROM FIELD AND DISASSEMBLY OF ENGINE REVEALED THE LEFT HAND MAGNETO IMPULSE COUPLING LOCKED-UP, STRIPPING THE GEARS IN THE ACCESSORY CASE, CAUSING COMPLETE ENGINE FAILURE.