As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING HEAVY MAINTENANCE INSPECTION, MAINTENANCE DISCOVERED DAMAGE TO THE RT NR 1 PRIMARY FLAP DRIVE TORQUE TUBE. THE ELASTOMERIC TORSION COUPLING AT 1 END OF THE SHAFT WAS DETERIORATED REQUIRING REPLACEMENT OF THE TORQUE TUBE, PN 734380B, SN 0273.