As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF L HYDRAULIC SYSTEM FLUID AT FL 310 FOUND A LEAK ON UPPER HYDRAULIC LINE FOR THE TRUCK POSITION PICS REMOVED AND REPLACED HYDRAULIC LINE FOR TRUCK POSITION PRESSURE LEAK CHECK REQUIED ALSO SENSOR ABOVE THE RIGHT MAIN LANDING GEAR. PART NIS IN LAX. ABOVE RIGHT HAND GEAR REF IPC 32-32-51-16. REQUIRES OPS CHK PART# BACH8A04EE0557B OR 19-3232-3-0118. AND SERVICING OF HYDRAULIC FLUID SERVICED A SIDE HYDRAULIC, LEAK CHECK, CHECK OPS NORMAL. RE-SERVICED TO APPROPRIATE LEVELS RETURN TO SERVICE