What was found
CREW REPORTED WHEN LANDING GEAR WAS SELECTED UP, RECEIVED A GEAR DISAGREE, PROX SYS FAULT 1. AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND ADJUSTED THE PROX 3 AND PX37 SENSORS, AND REMOVED AND REPLACED PSEU PER MAINTENANCE MANUAL UNDER DIRECTION OF THE MANUFACTURER. ALL OTHER PROX SENSORS WERE CHECKED FOR ADJUSTMENT. OPERATIONAL CHECKS WERE ACCOMPLISHED PER THE MAINTENANCE MANUAL WITH NO OTHER DEFECTS NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.