As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK - ON INITIAL CLIMBOUT LOSS OF ALL OF A SYSTEM HYD FLUID FIRST INDICATION WAS THE STBY RUDDER LIGHT FOLLOWED BY THE A SYSTEM ENGINE PUMP LOW PRESS LIGHT AND THE A SYSTEM ELEC PUMP LOW PRESS LIGHT. NORMAL LANDING NORMAL BRAKING. LANDING WT 113,500. REMOVED AND REPLACED MODULAR HYD SHUTOFF VALVE PER MM.