As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, THE PLANETARY CHIP LIGHT ON THE CAUTION PANEL ILLUMINATED. AC LANDED AND SHUTDOWN WITHOUT INCIDENT. MECHANIC WAS DISPATCHED TO THE HOSPITAL. ON INSPECTION, A SMALL SILVER OF METAL WAS FOUND ON THE PLUG WITH NO OTHER METAL NOTED. PLUG WAS CLEANED AND AIRCRAFT WAS RETURNED TO SERVICE. ON ARRIVAL BACK AT BASE THE TRANSMISSION OIL WAS CHANGED AND THE OIL FILTERS INSPECTED AND CLEANED. (K)