As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN GEAR WAS EXTENDED FOR LANDING, THERE WERE NO GREEN LIGHTS INDICATED ON FORWARD PANEL OR SECOND OFFICER'S PANEL. THE GEAR WAS CYCLED AND INDICATIONS WERE NORMAL. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE PROXIMITY CONTROL SWITCH UNIT AND OPERATIONAL CHECKS WERE NORMAL.