As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HAD A CHIP LIGHT NR 3 ILLUMINATE THREE TIMES IN 10 HOURS OF FLYING. IT WAS RECOMMENDED THAT BECAUSE THE CHIP DETECTOR IS AN INDICATION OF METAL WEAR THE ENGINE BE REMOVED. ON INSPECTION, A POLISHING STONE WAS FOUND IN THE GEARBOX THAT APPEARED TO BE CAUSING THE PROBLEM.