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 ON THE ISLAND OF HAWAII, THE PILOT EXPERIENCED A MAIN ROTOR GEARBOX CHIP INDICATION. A PRECAUTIONARY LANDING WAS MADE AT THE WAIMEA KOHALA AIRPORT AT APPROX 11:30 AM. INVESTIGATION BY THE MECHANIC FOUND SMALL SLIVERS OF METAL. THE METAL WAS REMOVED. THE AC WAS GROUND RUN WITHOUT FURTHER OCCURRENCE. THE AIRCRAFT WAS THEN RETURNED TO BASE. (K)