As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHIP LIGHT WAS DETECTED ON AIRCRAFT. CHIP DETECTORS WERE PULLED AND INSPECTED. LARGE PIECE OF GEAR TOOTH WAS FOUND ON PLUG. LARGE PIECE OF GEAR TOOTH BROKE OFF DURING FLIGHT. CAUSE FOR BROKEN GEAR TOOTH WAS DUE TO EXCESSIVE GALLING EXTENDING UP TO FORWARD END OF SMALL GEAR TEETH. (X)