As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON A SIGHTSEEING FLIGHT, PILOT EXPERIENCED A MAIN GEARBOX CHIP LIGHT INDICATION. THE PILOT MADE A PRECAUTIONARY LANDING. UPON INSPECTION OF THE MAIN GEARBOX CHIP PLUGS BY MAINTENANCE PERSONNEL, NO METAL WAS FOUND. CLEANED MAGNETIC CHIP PLUGS AND CONNECTORS. OPERATIONAL CHECK AND LEAK CHECK FOUND TO BE SATISFACTORY.