As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN GEAR SELECTOR SELECTED DOWN, THREE RED GEAR LIGHTS ILLUMINATED WITH NO GEAR EXTENSION. CYCLED TWICE MORE WITH SOME RESULT. PERFORMED GEAR ELECTRICAL OVERRIDE PROCEDURE IN QUICK REFERENCE HANDBOOK AND GEAR EXTENDED. REPLACED LEFT MAIN GEAR WEIGHT ON WHEELS PROXIMITY SWITCH. OPS CHECKS GOOD.