As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INFLIGHT SLOW LEAK OF L SYSTEM HYDRAULIC ISSUES. SYSTEM TURNED OFF IN FLIGHT AND TURNED BACK ON BEFORE LANDING. FLIGHT LANDED SAFELY AND TAXIED TO GATE UNDER OWN POWER. RESOLUTION LH OUTBOARD SPOILER ACTUATOR FILTER COVER REMOVED IAW AMM 27-61-02-024-001. LH OUTBOARD SPOILER ACTUATOR FILTER O-RING REPLACED IAW AMM 27-61-02-424-023. (TC# 20190729008)