As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3752 - ATB/HYD - DUE TO LOSS OF 'A' SYSTEM HYDRAULIC PRESSURE. CORRECTIVE ACTION: FOUND LEAK AT #1 ENGINE EDP. REPLACED SAME. FLUSHED EDP TO PYLON SUPPLY AND RETURN LINES. INSPECTED CASED DRAIN FILTER AND LINES. FOUND CONTAMINATION. REPLACED LINE AND FILTER. REPLACED CASE DRAIN LINE CHECK VALVE. OPS CHECKS GOOD.