As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PRIOR TO TAKEOFF FOR FIRST FLIGHT OF THE DAY, THE MAIN GEAR BOX CHIP LIGHT ILLUMINATED. HELICOPTER WAS SHUTDOWN AND METAL WAS FOUND IN THE OIL STRAINER "COARSE SCREEN". TRANSMISSION WILL BE SENT TO O/H SHOP FOR FURTHER INVESTIGATION.