What was found
DURING FLAP/SLAT EXTENSION, SLATS STUCK BETWEEN 15 DEG AND 30 DEG WOULD NOT RETRACT. OPENED RT WING LOWER L/E PANELS TO INSPECT FOR FAULTS. FOUND RT WING NR 2 SLAT OTBD J/S, INBD SIDE TRANS SHAFT "U" JOINT SHEARED IN TWO. REMOVED JOINT FROM SHAFT AND PART ON MSN. NR 2 SLAT TO NR 1 SLAT CONNECTING WRAP AROUND SEAL IS TORN AND REMOVED NEEDS REPLACEMENT ON ORDER. DISCONNECTOR TRANS SHAFT AT 1ST STEADY BEARING OTBD OF NR 2 ENG PYLON. ROLLED RT WING NR 2 AND 3 SLAT UP TO 270 DEG BEFORE HITTING UP STOPS. ROLLED LT WING AND RT WING NR 1 SLAT UP TO 270 DEG BEFORE HITTING UP STOPS.