What was found
WHILE PERFORMING PRE-FLIGHT INSP, MECH NOTICED PAINT CRACKED AND CHIPPED ON L/E OF WING ABOUT SS 236.9. UPON FURTHER INSP FOUND A CRACK, ABOUT 8.5 INCHES, THROUGH FIRST STIFFENER AND 4.0 INCHES AND 5.0 INCHES THROUGH SECOND STIFFENER ON BOTTOM OF L/E UNDER DE-ICE BOOT OTBD TO ABOUT WS 264. THIS AREA CLOSED OUT BY RIBS ONE EACH SIDE OF SLAT TRACKS. CRACK AREA COULD NOT BE FELT THROUGH DE-ICE BOOT. AFTER REMOVING CRACKED PORTION OF L/E FROM WING, FOUND 4 EACH STIFFENERS AND RIB CRACKED BEYOND REPAIR. ALSO, FOUND SLAT ATTACH FITTING IN NR 2 SLAT, P/N FITTING 246-17050-5, LOOSE IN SLAT. A CRACK ALSO RADIATED OUT FROM ATTACH BOLT HOLE THROUGH ATTACH RIB.