What was found
SLAT FAIL ON DEPARTURE. LEVELED OFF AT 13,000 FT AND PERFORMED QRH, MESSAGE DID NOT CLEAR. DECLARED EMERGENCY AND RETURNED TO FIELD. APPROACH AND LANDING ACCOMPLISHED WITH NO INCIDENT. MAINTENANCE INSPECTED SKEW SENSORS AND HARNESSES AND FOUND NO DEFECTS, UNABLE TO DUPLICATE. ON MAR 2, MAINTENANCE REMOVED AND REPLACED THE RT AND LT SLAT 3/4 HARNESSES.