What was found
PERFORMED INCOMING INSPECTION OF AC FOR REPAIR OF CORROSION AT DOORWAY ENTRY. UPON INSPECTION, EXTENSIVE CORROSION WAS FOUND AT VARIOUS LOCATIONS WHERE INSULATION WAS FACTORY INSTALLED. THIS INSULATION WAS FOUND TO BE DAMP AND HAD EXPOSED EDGES. THIS RESULTED IN MAY STRINGERS BEING REPLACED ALONG THE SIDES OF THE FUSELAGE AS WELL AS FUSELAGE SKINS FOR AN AREA OF ABOUT 3 FT X 3 FT ON EACH SIDE OF THE AIRCRAFT. EXTENSIVE CORROSION WAS FOUND AT THE AFT WING SPAR CARRY-THROUGH STRUCTURE AND THE CO-PILOTS ENTRY DOOR FRAME.