As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDED SFO UNDER AMBER ALERT DUE TO LOSS OF LEFT HYDRAULIC SYSTEM. *S/D* FOUND PRESSURE LINE UNION FITTING ON NR 1 EDP PRESSURE AND CASE DRAIN FILTER ASSY BROKEN. REPLACED UNION AND FILTERS, CHECKED ACMP AND EDPM FILTER FOR CONTAMINATION AND NONE WAS FOUND. ALSO, SYS CASE DRAIN FILTER CHECKED AND NO CONTAMINATION FOUND.