As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT THE PILOT REPORTED LOSS OF ENGINE POWER. POST FLIGHT INVESTIGATION FOUND THE #3 CYLINDER EXHAUST VALVE HAD COMPLETELY DISINTEGRATED. AFTER REPLACING THE #3 CYLINDER A RUN-UP WAS CARRIED OUT. EXCESSIVE ENGINE VIBRATION WAS EVIDENT. FURTHER INVESTIGATION REVEALED THAT METAL PARTICLES FROM THE DISINTEGRATED #3 CYLINDER EXHAUST VALVE HAD CAUSED METAL CONTAMINATION OF THE ENGINE.