What was found
FLAPS JAMMED AT 18 DEGREES AT 400 AGL AFTER TAKEOFF. FLAP HANDLE PLACED TO 20 & FLAPS & KRUEGERS RETURNED. FLAPS 0 SELECTED & FLAP RETRACTED TO 0. SLATS 0 SELECTED & SLATS JAMMED AT APPROX 2-3 DEGREES. FLAP HANDLE MOVED TO VARIOUS POSITIONS, SLATS REMAINED JAMMED. PRIOR TO DESCENT, SLAT BYPASS SELECTED & FLAPS 20 SELECTED. FLAPS REACHED 20. SLATS UP SELECTED, FLAPS REACHED 0. SLAT BYPASS DESELECTED. SLATS FULLY RETRACTED, ALL ICAS MESSAGES CLEARED. BOTH FSECU FLAP & SLAT MOTOR LIGHTS ILLUMINATED ON GROUND PRIOR TO ELEC SHUTDOWN. R & R FSECU IAW MM 27-51-05. R & R LT SLAT TORQUE LIMITER BRAKE UNIT IAW MM 27-80-05. OPS CHECKED NORM IAW MM 27-80-00.