As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACCESSORY DRIVE SHAFT ON THE EXTERNAL SCAVANGE PUMP SHEARED, RESULTING IN A LOSS OF OIL PRESSURE. PILOT DIVERTED THE FLIGHT. AIRCRAFT COMPONENTS OR SYSTEMS THAT RESULT IN TAKING EMERGENCY ACTIONS DURING FLIGHT (EXCEPT ACTION TO SHUTDOWN AN ENGINE).