As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3863 STRONG RANCID ODOR FROM PACKS DURING TAKEOFF AND LANDING. CORRECTIVE ACTION: DEGREES WITH NO ODORS NOTED. RAN PACKS TO 30 DEGREES WITH NO ODORS NOTED. FOUND LEFT HYDRALIC SYSTEM AT 106 AND RIGHT AT 93. DRAINED LEFT SIDE TO 93. NOW BOTH SIDES READ 93 . INSPECTED BOTH ENGINES FOR INGESTION. NONE FOUND (5518784).