What was found
DURING ROUTINE C-CHECK, FOUND RIGHT AFT SERVICE DOOR MID INTERCOSTAL CRACKED. REMOVED DAMAGED INTERCOSTAL. FABRICATED NEW INTERCOSTAL, LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, AND INSTALLED NEW INTERCOSTAL IAW DC8 SRM 51-1-20, 51-1-8, 51-1-21, AND DOUGLAS DRAWING 5772639.