As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE CHECK, CORROSION WAS FOUND OUT OF LIMITS ON FLOOR STRUCTURE SEAT TRACK FORWARD OF FLOORBEAM AT RT STA 380 RBL 48. REMOVED CORROSION IAW B727 SRM 511006. REMOVED DAMAGED SEAT TRACK IAW B727 SRM 513002. FABRICATED NEW SEAT TRACK PER SAMPLE FROM BAC 15207927178. TREATED AND PRIMED IAW B727 SRM 511002 AND MM 512002. INSTALLED IAW B727 SRM 513002.