As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - CREW FAILED TO RECEIVE NOSE GEAR 'GREEN' DOWN AND LOCKED INDICATIONS ON EITHER 'A' OR 'B' SYSTEM DURING INITIAL GEAR EXTENSION. GEAR POSITION INDICATION NORMAL AFTER CREW CYCLED LANDING GEAR. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED LANDING POSITION INDICATION SYSTEM. NO DEFECTS NOTED. PERFORMED GEAR SWING. UNABLE TO DUPLICATE DISCREPANCY. AIRCRAFT RETURNED TO SERVICE. (M)