What was found
FLIGHT 4114 - AIRCRAFT RETURNED TO GATE AFTER FLIGHT CREW WAS UNABLE TO RETRACT LANDING GEAR. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. DAY/MX INSPECTED AIRCRAFT AND DISCOVERED MAIN LANDING GEAR EMERGENCY EXTENSION BYPASS PIN TRIPPED, RESET PIN IAW MM 32-00-00. CONDUCTED A LANDING GEAR RETRACT TEST, OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.