As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-06 CHECK INTERGRANULAR CORROSION WAS FOUND ON R/H OUTBOARD SEAT TRACK BS 440. MAINTENANCE CUTOUT DAMAGED SECTION OF SEAT TRACK BS 440 TO BS 640. FABRICATED A NEW SECTION OF SEAT TRACK, AND INSTALLED REPAIR PART IAW B757-200 SRM 51-40-08, FIG. 5, PG. 13.