As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, LT WING F6 TORQUE TUBE HAS PITTING ON SPLINES AT MALE END. MX REMOVED F6 TORQUE TUBE REPLACED SPLINE END IAW SRM 51-40-02. RE-INSTALLED F6 TORQUE TUBE IAW AMM 27-51-03 SEE CONTINUATION CARD FOR WORK ACCOMPLISHED. PN 5913246 UNIVERSAL JOINT. AIRCRAFT REMAINS AT CMH UNTIL HEAVY CHECK IS COMPLETED.