As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LEFT MAIN LANDING GAER FAILED TO RETRACT AFTER TAKEOFF. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. AIRCRAFT FERRIED TO FAT FOR REPAIRS. MAINTENANCE ADJUSTED LEFT MAIN LANDING GEAR UPLOCK PROXIMITY SENSOR. LANDING GEAR EXTENSION AND RETRACTION NORMAL DURING GEAR SWING. AIRCRAFT RETURNED TO SERVICE. (M)