As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE INSPECTION SEAT TRACK AT BS 344 TO 380 RBL 54 WAS FOUND CORRODED OUT OF LIMITS. REMOVED CORROSION IAW B727 SRM 511006. REMOVED SEAT TRACK IAW B727 SRM 513002. FABRICATED NEW SEAT TRACK PER SAMPLE FROM BAC 1520792. TREATED AND PRIMED IAW B727 SRM 511002 & MM 512002. INSTALLED IAW B727 SRM 513002.