What was found
ON APPROACH INTO SKBO (BOG) AT APPROXIMATELY 10700 MSL, AFTER PUTTING THE LANDING GEAR DOWN, WE ONLY GOT GREEN NOSE GEAR AND A GREEN RIGHT MAIN GEAR LIGHTS. WE ACCOMPLISHED A GO AROUND AND BEGAN TO RUN THE QRH. AFTER RUNNING THE QRH, WE HAD THE SAME INDICATIONS. AFTER LANDING APROACHED TO THE AC ON THE RUNWAY IN ORDER TO INSPECT LANDING GEARS. NO EVIDENCE OF DAMAGE FOUND ON ANY OF THE MLG, PATICULARY ON THE LEFT MAIN LANDING GEAR. NO EVIDENCE OF HYDRAULIC LEAKS. DRAG BRACES FOUND WITH NO DAMAGE OR ADNORMAL POSITION NOR MISSING PARTS. ACTUATORS FOUND NORMAL AND NO EVIDENCE OF DAMAGE NEITHER. INSALLATION OF DOWNLOCKS SAFETY DEVICES WERE EASY WITH NO EXTRA FORCE REQUIRED. AC TOWED TO THE BLOCKS WITHOUT ANY DISCREPANCIES. DURING INSPECTION IN THE COCKPIT DISCOVERED THAT THE LEFT GREEN DOWN LIGHTS INDICATION WAS OFF. ACCOMPLISHED PILOTS' OVERRIDE SYSTEM, AUTOBRIGHT CONTROL, EFIS SYSTEM, AND LANDING GEAR ANNUNCIATORS - OPERATIONAL TEST IAW AMM 33-16-00-5-99. FOUND BOTH LIGHT BULBS INOP. REPLACED BULBS PER AMM 33-16-02-2 (SEE NEXT MDIS). TEST NORMAL. ACCOMPLISHED LANDING GEAR ALTERNATE EXTENSION CONDITION - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION) IAW AMM 05-51-33-2. EXAMINED NLG, LEFT AND RIGHT MLGS LOAD LIMITERS. NO DAMAGE OR EXCEDANCES NOTED. AC OK FOR SVC.