What was found
DURING C-CHECK, FOUND MAIN CABIN CORROSION ON SEAT TRACK FLANGE LBL 21 FS 344-360. REMOVED SEAT TRACK SECTION FS 344-360 LBL 21. FABRICATED, DRILLED, DEBURRED, ALODINED, AND PRIMED SEW SEAT SECTION. INSTALLED NEW SEAT TRACK SECTION FS 344-360 IAW 737 SRM 53-10-5. (M)