What was found
(AIRCRAFT NOT GROUNDED) (DEFECT DISCOVERED DURING AC HEAVY MX VISIT) NOSE FWD FUSELAGE CABIN FLOOR STRUCTURE, SEAT TRACK FOUND CORRODED AT Y1292 FR16 AREA / NOSE FWD FUSELAGE CABIN FLOOR STRUCTURE, SEAT TRACK AT Y1292 FR16 AREA WAS REPLACED AS PER SRM 51-72-11-911-001, REV 158.