What was found
FLIGHT NR 5148, ENROUTE, THE PILOTS REPORTED THAT UPON APPROACH TO LANDING, THEY LOWERED THE GEAR AND INITIALLY HAD 6 GREEN LIGHTS, BUT THEN HAD (3) (ALL "A" LIGHTS) GREEN. PILOTS INITIATED GO-AROUND AND GEAR WOULD NOT COME UP. PUT HANDLE DOWN AND LANDED WITH (3) GREEN "A" LIGHTS. MAINT REMOVED AND REPLACED THE LANDING GEAR CONTROL MODULE IAW MM 32-10. OPERATIONAL CHECK WAS GOOD. P/N OFF 120-38594-001 S/N OFF 120290.