What was found
DURING A MAINTENANCE VISIT FOUND CRACK, RT WING L/E LWR SKIN, INTERNAL DOUBLER AT STA XFS 572.5, CRACKED AT THE DRAIN HOLE. DAMAGE EXCEEDED LIMITS IAW DC-8 SRM. REMOVED DAMAGED, TREATED AREA IAW DC-8 SRM 51-1-8. FABRICATED AND INSTALLED DOUBLER IAW MFG DWG NR 676900 AND DC8 SRM 51-1-20 AND SRM 51-1-21D.