What was found
DURING A MAINTENANCE VISIT, FOUND A CRACK TO THE SUB FLOOR SKIN AT STA 225 LT. Z AXIS O LBL 58, DAMAGE EXCEEDED LIMITATIONS IAW DC-8 SRM. REMOVED DAMAGE, TREATED AND PRIMED AREA IAW DC-8 SRM 51-1-8. FABRICATED NEW SUB FLOOR & DOUBLER FROM 7075-T6 AND INSTALLED IAW DC-8 SRM 51-1-21 AND 51-1-4.