What was found
GRI - AFTER TAKEOFF, THE CREW ELECTED AN AIR TURN BACK. PILOT REPORTED THAT WITH GEAR RETRACTED, THE GEAR HANDLE LIGHT STAYED ON AND THE WARNING HORN WILL NOT SILENCE. MAINTENANCE REPLACED THE RT MLG SQUAT SWITCH. THE GEAR WARNING SYSTEMS WORKED SATISFACTORILY DURING SEVERAL GEAR SWINGS. (Z)