What was found
DECLARED EMERGENCY, AIR TURNBACK, DURING CLIMB, LOST A HYD SYSTEM, ACCOMPLISHED APPROPIATE CK LIST AND RETURNED TO MSY. REMOVED AND REPLACED NR 6 SPOILER ACTUATOR PLUG PER MM. INSPECTION REMOVED AND REPLACED EDP CASE DRAIN FILTER AND MODULAR PACKAGE FILTER'S ALSO REMOVED AND REPLACED 'A' SYSTEM RETURN FILTER PER MM.