As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1) WHEN LANDING GEAR WAS SELECTED DOWN, LEFT MAIN GREEN LIGHT FAILED TO ILLUMINATE. SECONDARY MAIN GREEN LIGHTS WERE ILLUMINATED. CYCLING LIGHTS DIMMER SWITCH GOT ALL GEAR LIGHTS WORKING. 2) REMOVED AND REPLACED KORRY LIGHT ASSEMBLY IAW B727 M/M 33-10-51 (LT GEAR). SYSTEM OPS CHECKED GOOD ON DUMMY RETRACTION IAW B727 M/M 32-30-00.