What was found
DURING A MAINTENANCE VISIT FOUND CRACKS, SKIN, LEFT WING O/B LEADING EDGE I/B SECTIONS LOWER SURFACE AT STA XFS 591.250, 1 TO 4 FWD OF FRONT SPAR. DAMAGE EXCEEDED LIMITS IAW DC-8 SRM. REMOVED DAMAGED, TREATED AREA IAW DC-8 SRM 51-1-8. FABRICATED AND INSTALLED DOUBLER IAW FAA APPROVED TENNESSEE TECHNICAL SERVICES DER ENGINEERING SKETCH #EO-99-109 WITH APPROVED 8110-3 DATED 08-05-99.