As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BROUGHT THROTTLES UP TO .5 EPR AFTER BEING CLEARED FOR TAKEOPF AND RECEIVED ECAM MESSAGE OF HYDRAULIC SYSTEM RESERVOIR OVERHEAT. WHEN THROTTLES BROUGHT BACK ECAM WENT AWAY. REJECTED TAKEOFF - YELLOW HYDRAULIC RESERVOIR OVERHEAT MESSAGE ON ECAM. MAINTENANCE REPLACED CHECK VALVE PER TSM 29-13-00. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK. AIRCRAFT WAS GROUNDED.