As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2363 THE CREW REPORTED THAT THE NUMBER ONE HYDRAULIC SYSTEM FAILED ON TAXI. THE AIRCRAFT WAS SHUTDOWN AND TOWED TO THE GATE WHERE MAINTENANCE REMOVED AND REPLACED THE NUMBER ONE ENGINE DRIVEN HYDRAULIC PUMP, SERVICED HYDRAULICS, OPERATIONALLY / LEAK TESTED WITH NO DEFECTS AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.