What was found
DURING CRUISE, LANDING GEAR WOULD NOT RETRACT, ACFT RETURNED TO DEPARTURE. REPLACED RT LANDING GEAR FWD WOW PROXIMITY SWITCH AND BOTH DOWNLOCK PROXIMITY SWITCHES, REPLACED NOSE DOWNLOCK SWITCH, LT LANDING GEAR FORWARD WOW SWITCH AND FWD DOWNLOCK SWITCH, OPS CHECK RETRACT SYS, OPS CHECKED GOOD, ACFT RETURNED TO SERVICE.