What was found
ON FINAL APPROACH, CREW ONLY RECEIVED 2 GREEN L/G DOWN AND LOCKED LIGHTS WHEN GEAR WAS EXTENDED. IND FOR N/G WAS NOT RECEIVED. GEAR PIN WAS CHECKED AND IND N/G DOWN. A TEST OF N/G IND BULB WAS GOOD. WHEN FLAPS EXTENDED TO 25 DEGREES GEAR HORN SOUNDED, WHEN A/C WAS SLOWED TO LESS THAN 150 KTS GEAR HORN SOUNDED. CREW ATTEMPTED TO MANUALLY EXTEND GEAR BUT PRESS REQUIRED FOR PUMPING INDICATED L/G WERE EXTENDED. CREW WAS INFORMED GEAR APPEARED TO BE DOWN AFTER MAKING 2 FLY-BYS PAST TOWER. FIRE RESCUE RESPONSE WAS GIVEN FOLLOWING AN UNEVENTFUL LANDING. MX REPAIRED A CHAFED WIRE FOR NLG IND SYS AND ADJUSTED MICRO-SWITCHES. L/G CYCLED SEVERAL TIMES, ALL L/G IND`S WERE OPERATING. A/C WAS RETURNED TO SERVICE.