What was found
CREW REPORTED AFTER TAKEOFF LG WOW SYS FAIL MESSAGE AND LANDING GEAR RETRACT LEVER WOULD NOT MOVE. GEAR STAYED DOWN AND GREEN. CREW DECLARED EMERGENCY AND RETURNED TO FIELD, LANDED WITHOUT INCIDENT. MAINTENANCE SERVICED THE NOSE LANDING GEAR, JACKED A/C AND PERFORMED GEAR SWINGS IAW EMB 170 MM 32-33-00.