What was found
IAH - FLIGHT 2278, THE CREW REPORTED A COMPLETE LOSS OF HYDRAULIC FLUID FROM THE NUMBER ONE SYSTEM. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE O-RINGS ON THE RIGHT HAND SPOILER HYDRAULIC CONNECTIONS, SERVICED THE AIRCRAFT WITH HYD FLUID, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.