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 IN THE E AND E COMPARTMENT RT STA 380 RBL 48 ON LOWER SURFACE OF SEAT TRACK. REMOVED CORROSION IAW B727 511006. FABRICATED 1 SEAT TRACK PER SAMPLE FORM BAC 153201827178. TREATED AND PRIMED IAW B727 SRM 511002 AND MM 512002. INSTALLED IAW B727 SRM 513002.