As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - CREW REPORTED HYDRAULIC SYSTEM A LOST FLUID AND LEFT ENGINE DRIVEN PUMP LOW PRESS LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT LANDED SFO LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT ENGINE DRIVEN HYDRAULIC PUMP. SYSTEM GROUND CHECK NORMAL OPERATION.