What was found
DURING UNSCHEDULED MAINTENANCE VISIT, A CORROSION BULGE AND CRACK OF THE EXTERNAL PLATING WAS FOUND AT FUSELAGE STATION 40, BETWEEN LONGERONS 34 AND 35 RIGHT. REPAIR WAS ACCOMPLISHED BY REMOVAL OF THE CORRODED PLATING, FABRICATION AND INSTALLATION OF FINGER DOUBLER, FILLER AND EXTERNAL DOUBLERS IN ACCORDANCE WITH FAA DER APPROVED DRAWING C31-R01, DOUGLAS SRM 51-1-21, 51-1-16, AND ENGINEERING ORDER 53-DC8-608.