What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETUNED TO JFK DUE TO THE FLIGHT CREW REPORTING THAT ON TAKEOFF, AFTER FLAP RETRACTION, THEY RECEIVED THE FOLLOWING ECAM MESSAGES: F/CTL L AIL FAULT, AND F/CTL AIL SERVO FAULT.ON SD PAGE, LEFT AILERON APPEARS INOPERATIVE, RIGHT AILERON WITH ONLY GREEN HYDRAULICS, AND FOR A SIGNIFICANT TIME RIGHT SPOILERS INDICATED RAISED/EXTENDED. THE AIRCRAFT LANDED SAFELY AT JFK WITHOUT FURTHER INCIDENT. MAINTENANCE LEFT WING AILERON SERVO CONTROL VALVE 33CEB AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 27-14-51.