As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE INSPECTION CORROSION WAS FOUND OUT OF LIMITS ON FLOOR SEAT TRACK OUTBOARD SIDE RBL 42. REMOVED CORROSION IAW B727 SRM 511006. FABRICATED NEW SEAT TRACK PER SAMPLE FROM BAC 15207887188. TREATED AND PRIMED IAW B727 SRM 511002 AND MM 512002. INSTALLED IAW B727 SRM 513002, 531005.