As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT LOST B SYS HYD, QTY TO ZERO DURING CRUISE FLIGHT. AN EMER WAS DECLARED & THE FLIGHT DIVERTED WITHOUT FURTHER INCIDENT. R & R EMDP IAW AMM 29-11-21. SERVICED B SYS RESERVOIR IAW AMM 12-12-00. OPERATIONALLY CHECKED NORMAL, NO LEAKS NOTED. THE ACFT WAS GNDED.