What was found
DURING COMPLIANCE OF FCD 1-5710-F0308148, FOUND SKIN CRACKED NEAR ZONE 519, LT WING INBD OF NR 1 ENGINE, JUST AFT OF INBD SLATS. PERFORMED HFEC OF THE SUSPECTED CRACK IN THE LT WING. CRACK APPROXIMATELY INCHES INCHES. INSTALLED FILLER AND DOUBLER IAW EA 1-5710-T0308293 P1.