As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT RETURNED TO BASE DUE TO FLUCTUATING OIL PRESSURE. MAINTENANCE OBSERVED OIL LEAK AND DETERMINED IT WAS COMING FROM THE END OF THE OIL FILTER HOUSING.UPON FURTHER EXAMINATION A CRACK WAS FOUND IN THE CHAMFERED END OF THE HOUSING. (TC# 20141015002)