As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MAIN GEAR BOX BEVEL GEAR HAS A BROKEN TOOTH. BEVEL GEAR SENT TO ENGINEERING FIRM FOR ANALYSIS AS TO DETERMINE THE CAUSE OF FAILURE. FRACTURE OCCURRED AT HEEL OF THE TOOTH AND FAILURE OCCURRED AS A RESULT OF A FATIGUE MODE OF PROGRESSIVE FAILURE.