As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN FLIGHT, NR 1 RUDDER ISOLATION VALVE AND NR 1 RUDDER HYD ILLUMINATED; NR 1 QTY WAS INDICATING 0.8 QTS, PRESSURE ON BOTH MAIN HYD 3000 PSI. INSPECTED AND CLEANED NR 1 GEARWELL, SERVICED NR 1 HYD SYS AND GROUND RAN ACFT. FOUND UPPER HYD LINE LEAKING ON NR 1 SPOILER UNLOADING VALVE. INSTALLED TEMP FLEX LINE. LEAK CHECK GOOD, C/L'S EXTINGUISHED. OK FOR SERVICE.