As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED IN CRUISE FLIGHT, ACFT TRANSMISSION CHIP ILLUMINATED TWICE. CAUTION LIGHT WENT OUT OF IT'S OWN BOTH TIMES. DURATION WAS 5-7 SECONDS EACH TIME. CHIP CAUTION WAS NOT ILLUMINATED, BUT DIVERTED TO AIRPORT. ACFT SHUTDOWN . AFTER INSPECTION OF CHIP DETECTOR, MAIN GEAR BOX IS MAKING METAL. SUSPECT RT INPUT PINION AND BEVEL GEAR. REFER TO ASB EC135-63A-012, REV 5. ACFT IS OUT OF SERVICE.