What was found
FLT 758 - DURING CLIMB-OUT, LOST PRESSURIZATION, AFTER DUMPING FUEL RETURNED TO KMIA, LANDED WITHOUT INCIDENT. AIRCRAFT WAS INSPECTED FOR OPEN DOORS AND COMPARTMENTS, NONE FOUND, DOOR SEAL INSPECTED FOUND NORMAL. ACCOMPLISHED GROUND PRESSURIZATION CHECK, NORMAL, NO LEAKS FOUND. AIRCRAFT RETURNED TO SERVICE. (M)