What was found
ON FINAL APPROACH, 3 GREEN LANDNG GEAR, THEN AT 500 FEET RT MLG FLICKERED RED, THEN WENT STEADY RED ACCOMPANED BY LANDING GEAR WARNING HORN. FOLLOWED QRH PULLED THEN STOWED EMERGENCY LANDING GEAR HANDLE AFTER GETTING 3 GREEN LIGHT, LANDING UNEVENTFUL. LUBED OVER CENTER LINKS AND REMOVED AND REPLACED MLG BUNGEE CYLINDER, OPS AND LEAK CHECK GOOD ON GEAR SWING. (M)