What was found
AFTER TAKEOFF LANDING GEAR WOULD NOT RETRACT, AMBER GEAR DOWN INDICATIONS, ALL 3, FOLLOWED AOM VOL 1 PROCEDURE, CYCLE LEVER, WITH NO CHANGE. ALL GEAR PIN IN COCKPIT. NO EMERGENCY DECLARED NORMAL DEPLANING. COMPLIED WITH FAULT ISOLATION MANUAL, IAW 32-32-00-810-803-A. NO DEFECT NOTED. INSPECTED MLG PROXIMITY SWITCH. COMPLIED WITH TROUBLESHOOTING OF ENTIRE AIR/GROUND PROXIMITY SYSTEM WHICH CHECKED GOOD. GEAR SWINGS WERE GOOD, IAW EMB 140, AMM 32-30-00-700-801A. ENTIRE SYSTEM CHECKED GOOD. RETURNED AIRCRAFT TO SERVICE. (M)