As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A TOUR FLIGHT, THE PILOT GOT A ENGINE CHIP LIGHT INDICATION. THE PILOT PERFORMED AN UNEVENTFUL UNSCHEDULED LANDING. THE MX DEPARTMENT WAS DISPATCHED AND FOUND A METAL SLIVER ON THE UPPER ENGINE CHIP PLUG THAT WAS CAUSING THE LIGHT. BOTH UPPER AND LOWER PLUGS WERE INSPECTED AND CLEANED. A GROUND RUN WAS PERFORMED WITH NO CHIP LIGHT. THE PLUGS WERE INSPECTED AGAIN AND FOUND CLEAN. THE ACFT WAS RETURNED TO SERVICE.