What was found
PHL - FLT 867 - AFTER TAKEOFF, CREW COULD NTO RETRACT THE LANDING GEAR. FLIGHT RETURNED TO FIELD AT PHL AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND A WIRE PULLED LOOSE FROM THE AIR/GROUND SENSING SYSTEM ELECTRICAL CONNECTOR. REMOVED AND REPLACED ELECTRICAL CONNECTOR D4574P AND S105 AIR/GROUND SENSING PROXIMITY SENSOR AT THE GROUND SPOILER BYPASS VALVE IN THE RIGHT MAIN LANDING GEAR WHEELWELL PER MM 32-09-01. OPERATIONAL CHECK GOOD. (M)