As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, C HYD QTY DROPPED TO NEAR ZERO CAUSING A C HYD PRESS TO DROP TO ZERO. AIRCRAFT RETURNED TO RFD (ATB). FOUND LEAK AT INBD SPOILER ACTUATOR ASSY FILTER CAP SEAL. REPLACED ORING AT INBD SPOILER LEFT WING IAW AMM 27-61-02. OPS CHECK GOOD. NO LEAKS NOTED AT THIS TIME. AIRCRAFT RETURNED TO SERVICE.