What was found
(CAN) DURING TROUBLESHOOTING TO DETERMINE CAUSE OF ROUGH RUNNING ENGINE OIL FILTER WAS REMOVED AND FERROUS METAL PARTICLES WERE FOUND. ENGINE WAS DISMANTLED AND #1 AND #3 CYLINDER EXHAUST VALVES WERE FOUND SEVERELY WORN.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) DURING TROUBLESHOOTING TO DETERMINE CAUSE OF ROUGH RUNNING ENGINE OIL FILTER WAS REMOVED AND FERROUS METAL PARTICLES WERE FOUND. ENGINE WAS DISMANTLED AND #1 AND #3 CYLINDER EXHAUST VALVES WERE FOUND SEVERELY WORN.