As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2464, THE CREW REPORTED THAT AFTER TAKEOFF RECEIVED A HYD SYS 1 FAIL MESSAGE FOLLOWED BY ASSOCIATED AIL SYS INOP, EICAS MESSAGE. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND REPAIRED THE RIGHT AILERON SYSTEM PRESSURE LINE IN FRONT OF THE RIGHT O/B FLAP, OPERATIONALLY AND LEAK CHECKED WITH NO DEFECTS. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.