What was found
FLT NR 24 - MCO-MDW - DIVETED TO ATL AFTER 'A' SYSTEM HYDRAULIC QUANTITY AND PRESSURE WENT TO ZERO IN FLIGHT. FOUND HYDRAULIC MOTOR SHAFT SEAL BLOWN ON RIGHT OUTBOARD FLAP POWER UNIT. REMOVED AND REPLACED RIGHT FLAP POWER UNIT HYDRAULIC MOTOR AND OPS CHECK OK, NO LEAK AS PER MM 27-51-62. REMOVED AND REPLACED NR 1 ENGINE 'A' SYSTEM HYDRAULIC PUMP AND CASE DRAIN FILTER PRECAUTIONARY AS PER MM 29-11-33 AND 29-11-41 AND REMOVED AND REPLACED NR 2 ENGINE HYD PUMP AND CASE DRAIN FILTER PRECAUTIONARY PER ABOVE MM REF. (M)