pressurize the tube and you wouldn t be able to breathe at 35,000 feet without the use of pressurized supplemental oxygen. the back of the airplane is getting a considerable amount of stress, not only from the pressurization, but also from the tail and all the stresses of flight. that bulkhead is very, very robust. it is a serious piece of structure. at the moment of the decompression, all the pressurized air for the cabin needs somewhere to go. it blasts back the cracked bulkhead, and unbeknownst to the pilot, the tremendous force blows the vertical fin and other parts of the tail section right off the giant 747. critical hydraulic lines are severed in the process. the first officer makes several radio calls that says, we re in uncontrollable flight, we do not have control of the airplane. they re fighting literally for their lives.
747 structure has cracked and expanded to the breaking point that it snapped. it s the aft pressure bulkhead, an umbrella-shaped structure toward the back of the plane. it s the device that keeps the pressure in the back part of the airplane contained properly. without that pressure, you can t pressurize the two and you wouldn t be able to breathe at 35,000 feet without the use of pressurized supplemental oxygen. the back of the airplane is getting a considerable amount of stress, not only from the pressurization, but also from the tail and all the stresses of flight. that bulkhead is very, very robust. it is a serious piece of structure. at the moment of the decompression, all the pressurized air for the cabin needs somewhere to go. it blasts back the cracked bulkhead, and unbeknownst to the pilot, the tremendous force blows the vertical fin and other parts of the tail section right off the giant 747.