What was found
UNWANTED SLAT DEPLOYMENT OCCURRED DURING CLIMB AT APPROXIMATELY FL290 AND 265 KNOTS. PITCH FEEL ANNUNCIATOR LIGHT ILLUMINATED AND AUTO PILOT DISENGAGED. COMPLETED UNWANTED SLAT EXTENSION CHECKLIST, REDUCED AIRSPEED TO ABOUT 230 KNOTS AND COMPLETED CONTROL CHECK TO ENSURE FULL AUTHORITY OF FLIGHT CONTROLS. SLATS RETRACTED ON THEIR OWN W/I 30 SECONDS AND AFTER SPEED WAS REDUCED. "CORRECTIVE ACTION" REPLACED #2 ADC IAW AMM 34-14-01 OPERATIONAL AND LEAK CHECK IAW AMM 34-11-00 OPERATIONAL TEST SATISFACTORY.