As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CTR HYD QTY DROPPED TO .29 INFLIGHT. MX IN WORK, FOUND NR 4 SPOILER LEAKING LEFT WING. SERVICE HYD SYSTEM. REPLACED O-RING ON NR 4 SPOILER ACTUATOR. LEAK CHECKED OK. CHECKED DIFFERENTIAL FILTER INDICATING ON CENTER ACMPS BOTH CHECK OK. CYCLED SPOILERS CONTROL SURFACES, NO FURTHER LEAK NOTED.