What was found
GOT A SLATS DISAGREE WHEN SLAT HANDLE WAS IN THE RETRACT POSITION. RETURNED FLAP HANDLE TO THE 0 DEGREES/EXTEND POSITION AND SLATS INDICATED EXTENDED. FOUND SLAT CONTROL POWER A C1 RESET C/B AND ATTEMPTED TO RETRACT SLATS. GOT THE SAME SLATS DISAGREE ALERT BUT THE CB REMAINED RESET. AIRCRAFT PITCH ALTITUDE AND SLIGHT VIBRATION WITH WDM 27-85-02, FOUND S1-9242 AND S1-9241 FAILED IN THE EXTEND POSITION. REMOVED AND REPLACED FLAP/SLAT CONTROL MODULE PER M/M 27-51-01 AFTER REPLACING S1-9242 AND S1-9241. ALSO REPLACED S1-9239 AND S1-9240 AS PRECAUTIONARY, AS PER THE ABOVE M/M REF PERFORMED.