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 TAKEOFF. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. AIRCRAFT FERRIED TO FAT FOR REPAIRS. MAINTENANCE REPLACED LEFT MAIN LANDING GEAR SHOCK ABSORBER PROXIMITY SENSOR. GEAR RETRACTON SYSTEM OPERATIONAL CHECK NORMAL DURING GROUND RETRACTION CHECK. AIRCRAFT RETURNED TO SERVICE. (M)