What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTIONS A CRACK WAS NOTED ON THE LEFT WING NR 2 SLAT LEADING EDGE OTBD HOOK SEAL CAVITY. CUT OUT EXISTING FILLER STRIP DIM 7.25 INCH BY 1 5/8 INCH. PERFORMED HFEC NO CRACKS NOTED. FABRICATED DOUBLER FROM AISI 301 .020 INCH 1/2 H DIM 7 3/8 INCH BY 5 5/8 INCH, REPAIR FILLER .032 INCH 3011/2 H DIM 7.5 INCH BY 1.75 INCH AND STRAP FROM .063 INCH 2024 T3 DIM 3 INCH BY 1 INCH (2EA). NO OTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.