As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND TE FLAP PDU GEARBOX FLUID LEVEL EMPTY OR NEAR EMPTY. WHILE REFILLING GEARBOX FLUID FOUND LEAKING OUT WEEP HOLE AT HYD DRIVE MOTOR INPUT SHAFT. GEARBOX WILL NOT RETAIN FLUID. STARTED REMOVAL OF TE FLAP PDU GEARBOX. REMOVED ELECTRIC FLAP MOTOR ON GEARBOX PER AMM. INSTALLED TORQUE CLAPS IN LEFT AND RIGHT WHEEL WELL. DISCONNECTED TORQUE TUBES AT LEFT AND RIGHT SIDE OF GEARBOX. INSTALLED TORQUE TUBES.