What was found
AFTER TAKE OFF LANDING GEAR FAILED TO RETRACT, ECAM DIRECTED GEAR DOWN ALL GEAR DOWN LOCKED INDICATIONS NORMAL. R & R LANDING GEAR CONTROL SWITCH IAW MM 32-31-11-0401. GROUND CHECKED NORMAL. OK FOR SERVICE. PERFORMED OPS CHECK OF LANDING GEAR SELECTOR VALVE IAW MM 32-31-12-0601. GROUND CHECKED NORMAL. OK FOR SERVICE.