As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT NR1 ENGINE OIL QUANTITY DECREASED FROM 2.0 GALLONS TO 1.0 GALLONS IN 30 MINUTES. FLIGHT WAS DIVERTED. POST FLIGHT INSPECTION FOUND OIL LEAKING FROM THE MAIN OIL FILTER HOUSING. FILTER AND NEW SEALS ADDED, SYSTEM CHECKED SERVICEABLE.