As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT DIVERTD TO BSB DUE TO ENGINE OIL QUANITY, EMERGENCY DECLARED AND AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE FOUND OIL LEAK FROM SELF CLOSING DRAIN VALVE AND VFSG MAST DRAINHOLE. REPLACED SELF CLOSING DRAIN VALVE IAW AMM 70-51-00.