What was found
FLT 725 - MMY-TOL - ON LANDING, EXTENDED THE LANDING GEAR. THE RED TAIL SKID LIGHT, THREE GREEN GEAR LIGHTS, THREE RED GEAR LIGHTS ALL ILLUMINATED. ALSO, THE GPWS WARNING TO LOWER GEAR SOUNDED AS WELL. THE CREW PERFORMED A GO AROUND, RECYCLED THE GEAR, AND ALL LIGHTS WORKED PROPERLY. THE AIRCRAFT LANDED WITHOUT FURTHER DIFFICULTIES. REMOVED AND REPLACED THE LANDING GEAR ACCESSORY UNIT. OPERATIONALLY CHECKS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)