As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE VISIT, CORROSION WAS FOUND ON THE LEFT SIDE CABIN SEAT TRACK, BS 1030 TO 1130. CORROSION WAS WITHIN LIMITS BETWEEN BS 1070 TO 1130. REMOVED, FABRICATED AND INSTALLED A NEW SECTION FROM BS 1010 TO 1070 IN ACCORDANCE WITH B727 SRM 53-10-5.