What was found
KDAL TRIP ID NR 813053, CREW REPORTED THAT THEY RECEIVED A UNSAFE GEAR INDICATION FOR THE RIGHT MAIN GEAR WITH NO GREEN LIGHT ILLUMINATING. THE GEAR HANDLE LIGHT WAS EXTINGUISHED. GEAR WAS CYCLED ONCE WITH NO CHANGE IN GEAR DOWN INDICATION. AN ALTERNATE GEAR EXTENSION, AND AIRCRAFT MANEUVERS WERE PERFORMED WITH NO IMMEDIATE CHANGE IN INDICATION. THE GEAR INDICATION ILLUMINATED ON THE 2 MILE FINAL APPROACH AND AN UNEVENTFUL LANDING WAS MADE. MAINTENANCE REPLACED THE RIGHT MAIN GEAR DOWN LOCK SWITCH. AIRCRAFT WAS RETURNED TO SERVICE.