What was found
FLT GT065 - ATB - APPROX 3.5 HOURS INTO THE FLIGHT, AND ADDITIONAL CARGO CHECK WAS MADE AN A HOLE APPROXIMATELY 1 FT SQUARE WAS DISCOVERED AT THE BOTTOM LEFT CORNER OF R4 MED. AIRCRAFT WAS AT FL 33, PRESSURIZATION WAS NORMAL (8.3). AFTER AIRCRAFT RETURNED TO MIA, INSPECTED FUSELAGE AND TAIL SECTION FOR FOD DAMAGE AND NONE FOUND. REPLACED R4 MED DOOR IAW MM 52-11-01. OPS CHECK AND LEAK CHECK NORMAL. (M)