What was found
LANDING GEAR WOULD NOT RETRACT AFTER MULTIPLE ATTEMPTS. THE CREW ELECTED TO RETURN TO DEPARTURE, NO EMERGENCY WAS DECLARED. MAINTENANCE JACKED UP THE AIRCRAFT, FOUND CORROSION ON PINS AND SOCKETS OF CONNECTOR 5002VP. CLEANED PINS AND SOCKETS. ALL LANDING GEAR INDICATIONS OPERATED NORMALLY, PERFORMED NUMEROUS GEAR SWINGS WITH NO DISCREPANCIES. AIRCRAFT RETURNED TO SERVICE.