What was found
UPON TAKEOFF FROM MSP, THE CREW RETRACTED THE LANDING GEAR AND HAD 3 GREEN AND THE GEAR INTRANSIT LIGHT ILLUMINATED. THE CAPTAIN STATED THAT THERE WAS NOTHING IN THE QRH FOR THIS PROBLEM. THE CREW EXTENDED THE LANDING GEAR AND THE AIRCRAFT RETURNED TO MSP. FOUND LANDING GEAR CONTROL UNIT LAMPS TEST BUTTON STICKY. REPLACED LANDING GEAR CONTROL UNIT P/N D494-10-001, S/N OFF 204/07-87, S/N ON 095/07-85 IAW AMM 21-31-05-02 AND COMPLETED GEAR SWINGS IAW AMM 32-30-00. ALL CHECKS GOOD.