As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO EXTEND AFTER SEVERAL ATTEMPTS WITH LANDING GEAR CONTROL LEVER. HYDRAULIC PRESSURE NORMAL. USED ELECTRIC OVERRIDE TO EXTEND GEAR. RETURNED TO LAX. REPLACED RIGHT GEAR PROXIMITY SENSOR HARNESS AND CYCLED GEAR SEVERAL TIMES, OPS CHECKS GOOD.