As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LEFT MLG 'A' AND 'B' SYSTEM INTRANSIT LIGHTS ILLUMINATED DURING TAKEOFF ROLL. TAKEOFF ABORTED WITHOUT INCIDENT. MAINTENANCE ADJUSTED LEFT MLG 'A' AND 'B' SYSTEM DOWNLOCK PROXIMITY SENSORS. LANDING GEAR POSITION INDICATIONS NORMAL DURING GEAR SWING. AIRCRAFT RETURNED TO SERVICE. (X)