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With pressurization. once we realize we can t do it and it appears that be the case we would begin an emergency descent after we deploy the oxygen masks, which may have already been deployed through the automatic system anyhow. most systems are set up to deploy when the cabin altitude as opposed the altitude reaches 10,000 feet. so we d apply speed brakes, any other known means within our procedure for that are particular aircraft to get it safely to a breathable altitude. and that would be the roller coaster feeling mary schiavo was just dressing. that feeling in the pit of your stomach for those three minutes for all those passengers on that plane. david, let me go back to you. i m hearing corroborated among all of you that it seems highly unlikely it could be a door. back to one of your other possibilities, saying it could have been the safety valve. can you explain that for me? well the safety valve or the outflow valve there s two different valves. the outflow valve regulate ....
Should issue an emergency air waves directive and these planes should be grounded until those doors, doors can be inspected. that s a very, very rare and very dangerous event and would indicate something seriously wrong with the plane. if it s a lack of pressurization in flight again, we all harken back to the event. it would be an outflow valve. it could be a number of things that lead to that. that would, of course cause the planes to be inspected too. if it s a door failure, hugely dangerous, hugely important. okay. and mary, when you hear that it was at 38,000 feet drops all the way down to 10,000 in three minutes i m just thinking about the 75 people on board and wondering, what would that feel like? it would feel like a roller coaster. when you re coming over the top and going down that is far greater than the rate of descent for this plane. obviously the plane could withstand it. it s beyond the envelope of what ....
Pressure inside the aircraft. you have a constant flow of pressurization coming from the engines into cabin on this aircraft. it s just regulated as far as what altitude. now, remember altitude and pressure are what maintain the breathability of the air. so this outflow valve then controls how much pressure is inside the cabin. you re maintaining that cabin pressure at a normal 8,000 feet or 10,000 feet at the most. so that would make it regular air. now, when this outflow valve fails, let s say it gets plugged up it can overpressurize the cabin, so there s another valve called the safety valve. although it s normally closed in this situation where the joet flow valve fails, the safety valve would open and release that excess pressure. what s happened in the stewart situation, when of course everyone was incapacitated, is the safety valve failed. when the outflow valve fail and the safety valve didn t do its ....
First of all, to get to it from the cabin area. you d have to take them they re in the back of aircraft. they d have to be taken out, brought forward. the best way take it out of the aircraft would to take it to the equipment bay and drop it overboard through the outflow valve, which is in the bottom of the bay. that would be about the only way you could do it. again, it would be extremely difficult if not impossible to get it from the tail of the aircraft into the interior of the aircraft. professor stupples, i wonder about your level of optimism. we were hearing a lot of it from air chief marshall houston, also from the prime minister tony abbott. the p3 orion has been modified to pick up these sounds, and the signals they re picking up are not at 37.5 kilohertz, which is the frequency at which the pinger locator emits the pinger. ....
Occur from time to time. generally they don t create any kind of situation that would be alarming. however, this one was unique. i want to stress the fact that it was unique, very, very rare situation. maintenance normally catches these when they re terribly small and not any event. remember randi, there s at least one hole in the airplane all the time. that s the hole that we hose the outflow valve. that valve oscillates back and forth and controls from the cockpit to provide for apprecia pressurization in the airplane. the higher you get, the more it closes. there are other little holes that are already programmed in there. so having a hole in the airplane isn t the whole issue. having a leak or crack. you won t see that on the panel in the cockpit. it is only when it begins to be much more significant. what s happened in the past and historically maintenance has been able to catch these long ....