What was found
DURING HEAVY CHECK MAINTENANCE FOUND CORROSION FOUND ON FORWARD FUSELAGE FLOOR STRUCTURE, RH IB SEAT TRACK AT FR16. FWD FUSELAGE FLOOR STRUCTURE, RH IB SEAT TRACK BETWEEN FR12-FR20 REPLACED IAW SRM 51-41-01, SRM 51-43-03 AND SRM 51-43-04.