What was found
DURING A MAINTENANCE VISIT, FOUND FRAME CHANNEL, WITH CORROSION DAMAGE BEYOND LIMITS IAW DC-8 SRM, AT STA 520 AND LONGERON 36. REMOVED DAMAGED SECTION, TREATED AREA IAW DC-8 SRM. FABRICATED AND INSTALLED REPAIR IAW FAA APPROVED TIMCO DER ENGINEERING SKETCH REO-05142.