What was found
FOUND BULGES IN FUSELAGE SKIN AT AND BETWEEN RIVETS IN STR 51R AND 51L APPROX BODY STA 1940-1950. PERFORMED VISUAL INTERNAL INSPECTION, CORROSION APPEARS TO BE LOCALIZED TO AREA BETWEEN STRINGERS AND SKIN AT TWO LOCATIONS STR 51L&R STA 1945 LUMP APPEARANCE LATER FOUND TO HAVE EXTENSIVE CORROSION ON THOSE STRINGERS. CORROSION FOUND ON LWR SURFACE OF STR 51L & 51R. MATERIAL LOSS BEYOND LIMITS AFTER CLEAN UP. CUT OUT DAMAGED SECTIONS OF BOTH STRINGERS. ACPD EXTRUDED STRINGER REPAIRS AT BOTH STRINGERS BY INSTALLING 094372U-CHANNEL AND REINFORCING SIDE ANGLES. CUT OUT DAMAGED SECTION OF SKIN, INSTALLED REINFORCING EXTERNAL DOUBLER & TRIPLER.