What was found
CLT - FLT 1448 - LANDING GEAR WOULD NOT COME UP AFTER TAKEOFF FROM CLT. CREW PULLED AIR GROUND RELAY LIGHTS CIRCUIT BREAKER PER QUICK REFERENCE HANDBOOK PROCEDURES AND RETURNED TO FIELD AT CLT. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE S106 AIR GROUND SENSE PROXIMITY SENSOR PER MM 32-09-01. OPERATIONAL CHECK NORMAL PER MM. (M)