As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, RECEIVED AN ECAM BLUE HYD LOW PRESSURE WARNING. ACCOMPANIED BY AIR LIGHT AND LOW PRESSURE LIGHT ON OVERHEAD PANEL. ECAM SHOWED LOSS OF ALL HYDS ON BLUE HYD SYSTEM. FOUND BOTTOM OF BLUE SYS PRIORITY VALVE BLOWN APART. R & R BLUE HYD SYS PRIORITY VALVE AND PERFORMED. OPS AND LEAK CHECKED. BLUE HYD SYS GROUND CHECKED GOOD IAW AMM 29-12-12-04.