As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FL 1963 - SHORTLY AFTER TAKEOFF, CREW RECEIVED LEFT HYDRAULIC SYSTEM LOW QUANTITY LEVEL MESSAGE. CREW SHUT DOWN THE HYDRAULIC PUMP WHEN THE QTY REACHED 50 PERCENT. QTY CONTINUED TO DROP. FLIGHT RETURNED TO PHL AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND THE LINE TO THE LEFT MAIN GEAR OVERCENTER ACTUATOR LEAKING AND REPLACED IT. (M)