As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 6 HRS INTO FLIGHT, CREW REPORTED "HYD 1 LO QTY" MESSAGE POSTED TO EICAS. DECISION WAS ADE TO DIVERT TO PREVENT FURTHER DAMAGE DUE TO PUMP CAVITATIONS SHULD QTY GO TO ZERO. UPON INSP THE RT OTBD MULTI FUNCTIONAL SPOILER ACTUATOR WAS FOUND TO HAVE FAILED. THE ACFT WAS REPAIRED AND RETURNED TO SERVICE. (K)