As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON POSTFLIGHT INSPECTION, FOUND OIL POOLING BELOW RT ENGINE DRAIN MAST. REMOVAL OF COWL REVEALED OIL ON THE ALTERNATOR QAD AND DRIPPING FROM SEAL CAVITY. FOUND THE LT ENGINE WITH OIL ALSO, BUT LESS OF IT. CARBON SEAL WAS CHANGED ON RT ENGINE, THEN THE LT ENGINE SHORTLY AFTER. SEALS SHOWED UNEVEN WEAR ON THE FACE.