As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SHUTDOWN, PILOT DISCOVERED OIL DRIPPING FROM NACELLE AREA ON LT ENGINE. COWLING WAS REMOVED AND OIL WAS DISCOVERED COMING FROM THE UPPER OIL SCAVENGER TUBE ON LT LWR SIDE OF ENGINE AT THE AFT SIDE OF THE "C" FLANGE COUPLING (PN 3113090-01). TUBES WHERE DISASSEMBLED AND FOUND O-RING (PN AS3209-116) SPLIT ON TRANSFER TUBE (PN 3100481-01). CLEANED ALL SURFACES AND REPLACED ALL O-RINGS WITH NEW AND REASSEMBLED. TEST RAN AND LEAK CHECKED AND FOUND OK.