As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LANDING GEAR FAILED TO RETRACT AFTER DEPARTURE. CREW USED OVER-RIDE SYSTEM TO COMPLETE GEAR RETRACTION. AIRCRAFT FERRIED TO FAT FOR REPAIRS. FAT MAINTENANCE REMOVED AND REPLACED NOSE GEAR WEIGHT ON WHEELS PROXIMITY SENSOR. LANDING GEAR RETRACTION CHECK NORMAL DURING GEAR SWING. AIRCRAFT RETURNED TO SERVICE. (X)