As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT LOST A-HYDRAULIC SYSTEM WHILE EN ROUTE. THE AIRCRAFT WAS DIVERTED TO BUF WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LEFT WING AFT SPAR PRESSURE HYDRAULIC LINE LEAKING. A FLEX LINE WAS INSTALLED AND A DIP WAS ISSUED TO REPLACE THE LINE WITHIN 500 FLIGHTS OR 1200 HOURS, WHICHEVER COMES FIRST. LEAK CHECKS WERE GOOD.