As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - RIGHT MAIN LANDING GEAR RED INTRANSIT LIGHT ILLUMINATED AND LANDING GEAR POSITION WARNING HORN ACTIVATED MOMENTARILY WITH LANDING GEAR IN DOWN POSITION ON FINAL APPROACH. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED LANDING GEAR ASSEMBLY AND LANDING GEAR POSITION INDICATION SYSTEM. NO DEFECTS NOTED. UNABLE TO DUPLICATE DISCREPANCY. AIRCRAFT RETURNED TO SERVICE. (W)