What was found
ON POST FLIGHT WALK AROUND FOUND CRACK LT WING SLAT TRACK CUT OUT OTBD OF REFUELING PANEL. COMPLIED WITH HFEC INSPECTION & VERIFIED CRACK TO BE 1.1" IN LENGTH. REMOVED PANEL 579DB FOM & PLACED IN CREW AREA. IAW SRM MD10 57-10-00 MATERIAL ID 6AL4V .063 TITANIUM EXTERNAL DOUBLER MP 64228 & FILLER 7075 T6 .090 MP 1681501. REMOVED FASTENERS IAW SRM MD10 51-31-01 VOL 2 & REMOVED DAMAGE IAW SRM MD10 57-10-00 REQUIRES HFEC INSPECTION. VERIFIED DAMAGE, REMOVED BY HFEC INSPECTION. NO OTHER ANOMALIES NOTED IAW NTM 20-30-00 PT6. FABRICATED REPAIR DOUBLER, TREATED & PRIMED MATING SURFACES IAW SRM57-10-00. OK TO INSTALL, INSTALLED REPAIR DOUBLER IAW SRM.