As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE CHIP LIGHT ILLUMINATED WHEN ENGINE WAS BROUGHT TO FLIGHT IDLE AFTER ENGINE START UP. MAINTENANCE FOUND 2 FLAKES WITHIN LIMITS ON THE UPPER CHIP PLUG.A 30 MINUTE GROUND RUN WAS PERFORMED, THE PLUGS WERE INSPECTED AGAIN AND FOUND CLEAN. AIRCRAFT RETURNED TO SERVICE.