As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL AT 60 KNOTS RECEIVED ''HYD Y RSVR LO LVL'' MESSAGE. ABORTED TAKEOFF AND RETURNED TO THE GATE WITHOUT INCIDENT. MAINTENANCE SECURED LOOSE PARKING BRAKE PRESSURE RETURN LINE AT MANIFOLD WITH HP TRANSMITTER. LEAD CHECKED OK.