As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TRAINING THE RIGHT HAND ENGINE OIL PRESSURE BEGAN TO DROP. ENGINE WAS SHUTDOWN AND THE AIRCRAFT LANDED SAFELY. INSPECTION FOUND THE DRY AIR PUMP LOWER ATTACHING HARDWARE WAS NOT TIGHT, CAUSING A SUBSTANTIAL OIL LEAK. THE HARDWARE WAS SECURED AND THE AIRCRAFT RETURNED TO SERVICE.