As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SYSTEM-A HYDRAULIC SHOWING 20 PERCENT - AFTER CLIMBING TO 24K FEET, GOT SYSTEM-A, ENGINE 1, LOW PRESSURE LIGHT ILLUMINATED WITH HYDRAULIC QUANTITY READING OF 20 PERCENT. FOUND HYDRO LINES FOUND LEAKING. REPLACED LEAKING LINES AND SERVICED HYDRO SYS "A".