What was found
DURING A MAINTENANCE VISIT FOUND CORROSION, FUSELAGE, LT UPPER CUSP AT STA 380 FROM FRAME ATTACH ANGLE SHIM, LONGERON 21 LEFT. DAMAGE EXCEEDED LIMITS IAW DC-8 SRM. REMOVED DAMAGED, TREATED AREA IAW DC-8 SRM 51-1-8. FABRICATED AND INSTALLED SHIM IAW DC8 SRM 51-1-4 AND 51-3-0. (CORROSION DAMAGE RECORDED IN EWA CORROSION PROGRAM).