As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PDC WALK, FOUND OIL LEAKING FROM THE NR 2 ENGINE. ACFT GROUNDED. FOUND OIL SEEPING FROM THE NR 2 ENGINE GEARBOX HAND CRANKING PAD COVER. REMOVED AND REPLACED THE O-RINGS FOR CRANKING COVER. LEAK CHECKED IAW AMM 71-00-00-800-811-F00, TEST 3A, AND AMM 72-63-01.