As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXPERIENCED LOW BLUE HYDRAULIC SYSTEM PRESSURE DURING INITIAL TAKEOFF ROLL. THE TAKEOFF WAS ABORTED AT 70 KNOTS AND THE AIRCRAFT RETURNED TO THE GATE. LOCAL MAINTENANCE CONTRACTOR ACCOMPLISHED TSM 29-12-00-810-805-A AND DISCOVERED A FAILED BLUE HYDRAULIC SYSTEM ACCUMULATOR. THE ACCUMULATOR WAS REPLACED IAW AMM 29-12-42-PB 401 AND THE AIRCRAFT WAS RETURNED TO SERVICE. NO FURTHER ISSUES NOTED ON SUBSEQUENT FLIGHTS.