As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE SLAT TORQUE TUBE COUPLING SPLINES WORN AT NR 5 LEADING EDGE SLAT GEARBOX. INVESTIGATION ON REMOVAL FOUND THAT THE SPLINES (SPLINE FITTING P/N 256T2806-1 WERE COMPLETELY MISSING FROM THE TORQUE TUBE FITTING. THE TORQUE TUBE COUPLING P/N 256T2801-1 APPEARS IN SATISFACTORY CONDITION WITH ONLY A SMALL AMOUNT OF WEAR EVIDENT.