As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE B-SYSTEM HYDRAULIC PUMP LIGHTS AND PRESSURE BEGAN TO FLUCTUATE WHILE LEVEL AT FL 310. LIGHT ILLUMINATED STEADILY WHEN B-SYSTEM HYDRAULIC QUANTITY REACHED 0. FOUND FITTING ON HYDRAULIC RETURN LINE ON NR 2 B-PUMP LEAKING. REPLACED RETURNED LINE, SERVICED HYDRAULIC SYSTEM AND THE LINE LEAK CHECKED GOOD.