As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: OIL QTY #2 WENT FROM 20QTS TO 3QTS IN 2.5 HRS. AIRCRAFT RETRUND TO HND AND AN AMERGENCY WAS DECLARED LANDED WITH BOTH ENGINES AND WITHOUT INCIDENT. MAINTENANCE FOUND OILD DRIP AT R ENG DRAIN MAST MFP TBV PORT. REPLACED AGB MFP SEAL IAW AMM72-64-01. PERFORMED TEST #4 PART POWER LEAK TEST. THEN NO LEAK PER AMM 71-00-00