As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CHIP LIGHT CAME ON AT START UP. ENGINE CHIP PLUGS WERE CLEANED ONLY TO COME ON AGAIN ON THE NEXT START UP. THE ENGINE WAS IMMEDIATELY PULLED AND SENT TO AN OVERHAUL SHOP. THEY DISCOVERED THAT THE PROBLEM WAS THE NR 2 BEARING RACE WAS BEING WARN AWAY.