What was found
DURING ROUTINE C CHECK, FOUND VERTICAL STABILIZER LEFT SIDE PANEL INTERNAL SKIN CORRODED BETWEEN STATION ZR253 AND STATION ZR299.125. REMOVED EXISTING STRUCTURE FROM DAMAGED PANEL. FABRICATED NEW SKIN PANEL AND STIFFENERS. LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, INSTALLED STRUCTURE, NEW STIFFENERS, AND FASTENERS WET WITH SEALANT. YAW COPES EGO. COO-8-55-382-04 DATED 10/12/2004.