As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER 35 HOURS TIME IN SERVICE NR 1 ENG STARTED LEAKING (BEYOND LIMIT). FOUND BOTH FORWARD AND AFT SEALS HAD MISSING INTERSAL CIRCULAR SPRINGS. THIS GEARBOX WAS JUST OVERHAULED, W/O NR LW422398. ALSO FOUND 2ND GEARBOX IN INVENTORY SN: CAG37879, IN SAME CONDITION.