As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL PUMP DRIVE GEAR FOUND CRACKED AT RADIUS BETWEEN GEAR FACE AND SHAFT. CRACK LENGTH IS APPROXIMATELY 1/3 THE CIRCUMFERENCE OF SHAFT. NO PREVIOUS HISTORY OF PROP-STRIKE. SUSPECTED OVER-TORQUE OF THE OIL PUMP DRIVE GEAR NUT OF 23.3-25.0 FT LBS.