As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, LOST ALL HYD SYS 2 PRESSURE AND QTY WENT DOWN TO 5 PERCENT. DIVERTED, AFTER RUNNING QRH. EMERGENCY DECLARED. FOUND O-RING LEAKING FROM NR 2 HYD RESERVOIR. R & R NR 2 HYD RESERVOIR O-RING IAW AMM 29-11-30. R & R EDP IAW AMM 29-11-01. OPS AND LEAK CHECKED GOOD AND R & R NR 2 HYD MANIFOLD FILTERS IAW AMM 29-11-01. BLED SYSTEMS.