As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC SYSTEM A FAILURE ON TAXI OUT PRIOR TO TAKEOFF. *S/D* FOUND ''A'' SYSTEM AILERON FLIGHT CONTROL MODULE COMPENSATOR CARTRIDGE LEAKING. REPLACED COMPENSATOR PER MAINTENANCE MANUAL. SERVICED HYDRAULIC SYSTEM. PRESSURIZED ''A'' SYSTEM, NO LEAKS NOTED. OPS CHECK OK.