What was found
DURING APPROACH FROM KFXE TO KHOU AT APPROXIMATELY 1930 HRS LOCAL, FLIGHT CREW OBSERVED NO LANDING GEAR DOWN AND LOCKED INDICATION. CREW ELECTED TO ABORT LANDING AND CONTINUE FLIGHT TO COMPLETE ABNORMAL CHECKLIST, AND COMMUNICATED THIS TO KHOU TOWER. CREW COMPLETED ABNORMAL CHECKLIST, AND UTILIZED SECONDARY GEAR INDICATORS TO VERIFY GEAR WAS INDEED DOWN AND LOCKED. AIRCRAFT LANDING WAS UNEVENTFUL. GROUND MAINTENANCE CREW OBSERVED FAULT. UPON CYCLING CIRCUIT BREAKER TO WARNING LIGHT SYSTEM, MAINTENANCE CREW REPORTED LIGHTS FUNCTIONING NORMAL. NO FURTHER FAULTS HAVE APPEARED IN SUBSEQUENT FLIGHTS.