What was found
BDL - FLT 8026 - SHORTLY AFTER TAKEOFF, CREW WAS UNABLE TO RETRACT THE LANDING GEAR AND THE GEAR HORN WOULD NOT STOP SOUNDING. CREW ACCOMPLISHED QUICK REFERENCE HANDBOOK PROCEDURES AND RETURNED TO FIELD AT BDL. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE T/S SYSTEM PER MM 32-09-10. REMOVED AND REPLACED S106 AIR/GROUND PROXIMITY SENSOR PER MM 32-09-01. OPERATIONAL CHECK NORMAL. (M)