As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB OUT THE MAIN GEARBOX CHIP LIGHT ILLUMINATED. AIRCRAFT RETURNED TO SEVICE LANDING.ON INSPECTION, METAL PARTICLES WERE DISCOVERED ON THE CHIP PLUG AND IN THE COARSE SCREEN. THE MGB WAS REMOVED FROM SERVICE. AT DISASSEMBLY ONE TOOTH WAS FOUND MISSING FROM MAIN BEVEL GEAR. OIL/WATER CONTAMINATION WAS ALSO PRESENT.