As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE A SYSTEM GREEN LIGHT ON FOR RIGHT MAIN GEAR AFTER LOWERING GEAR HANDLE. ALL SIX DISAGREEMENT LIGHTS ON AND NO ADDITIONAL GREEN LIGHTS. AFTER APPROXIMATELY A 1 MINUTE DELAY, ALL SIX GREEN INDICATIONS. INSPECTED LANDING GEAR FOR DEFECTS FOUND RIGHT INBOARD GEAR DOOR SEQUENCE VALVE TO BE DEFECTIVE. REPLACED RIGHT INBOARD GEAR DOOR SEQUENCE VALVE WITH SERVICEABLE UNIT. S/N OFF 506, S/N ON 1905. PERFORMED EXTENSIVE FUNCTIONAL CHECK OF LANDING GEAR SYSTEM. ALL FOUND GOOD.