As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT A HOVER READY FOR TAKEOFF, AFTER INITIAL RUN UP AND PREPARING FOR TAKEOFF MAIN GEAR BOX LIGHT CAME ON. MAINTENANCE DISCOVERED METAL CHIP CONTAMINATION ON LEFT AND RIGHT MAIN GEAR BOX CHIP DETECTORS. TRANSMISSION REMOVED FROM SERVICE. (M)