As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 370 ENG 2 SYSTEM B LOW PRESSURE LIGHT ILLUMINATED. HYD B SYSTEM SHOWED 40 PERCENT THEN DROPPED TO 1 PERCENT. ELEC B LIGHT ILLUMINATED ALONG WITH FEEL DIFFERENTIAL PRESSURE LOSS OF SYS B. REPLACED HYDRAULIC LINE AND HOSE. OP AND LEAK CHECK GOOD.