What was found
DURING THE C-CHECK, IDENTIFIED CORROSION ON THE FWD FUSELAGE FLOOR STRUCTURE INBOARD SEAT TRACK FRAME13 TO 20. CORRODED SEAT TRACK AT FWD FUSELAGE RT INBD SIDE, FR 13 - 20, REMOVED AND REPLACED IAW SRM 51-41-01, 51-43-03, AND 51-43-04.