As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH LANDING GEAR WAS SELECTED TO THE DOWN POSITION BUT ONLY 2 GREEN LIGHTS ILLUMINATED. PILOT DETERMINED BULBS FOR ONE GEAR INDICATOR WERE INOP BUT WAS UNABLE TO SWAP. MAINTENANCE REPLACED BULBS AND OPS CHECK GOOD. NO FURTHER REPEATS.