As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LANDING GEAR WOULD NOT EXTEND WITH NORMAL EXTENSION. ABNORMAL GEAR EXTENSION PROCEDURES USED. AIRCRAFT FERRIED TO FAT. MAINTENANCE REMOVED AND REPLACED LANDING GEAR RELAY BOX. SYSTEM OPERATIONAL CHECK NORMAL DURING GEAR RETRACTION CHECK. AIRCRAFT RELEASED FOR SERVICE. (M)