What was found
RIGHT WING NUMBER 4 SLAT LEADING EDGE SKIN AT ACTUATOR CUTOUT APPEARS TO BE CRACKED. REMOVED ACTUATOR DOOR SEAL ASSEMBLY IAW B737 SRM 57-41-01, STOP DRILLED CRACK IAW B737 SRM 57-41-01. MATERIAL ID 301 1/2 HARD, .040", IC 0649022 IAW B737 SRM 57-41-01, FABRICATED REPAIR DOUBLER IAW B737 SRM 57-41-01. PRIMED REPAIR DOUBLER IAW B737 SRM 51-20-01, INSTALLED REPAIR DOUBLER IAW B737 SRM 52-41-01. REINSTALL ACTUATOR DOOR SEAL.