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Most commercial aircraft that operate at high flight altitudes are pressurized at a maximum cabin altitude of approximately 8,000 feet. On most pressurized aircraft, if cabin pressurization is lost when the aircraft is flying at an altitude above 4,267 m (14,000 feet), compartments containing the oxygen masks will open automatically, either above or in front of the passenger and crew seats ...
Commercial aircraft provide emergency oxygen to passengers to protect them in case of loss of cabin pressure. The cockpit crew are typically supplied from compressed oxygen cylinders. The oxidizer core is sodium chlorate (Na Cl O 3), which is mixed with less than 5 percent barium peroxide (Ba O 2) and less than 1 percent potassium perchlorate ...
"On 25 July 2008, a Boeing Company 747-438 aircraft carrying 369 passengers and crew rapidly depressurised following the forceful rupture of one of the aircraft's emergency oxygen cylinders in the forward cargo hold. The aircraft was cruising at 29,000 ft and was 55 minutes into a flight between Hong Kong and Melbourne."
ValuJet Airlines Flight 592 was a regularly scheduled flight from Miami to Atlanta in the United States. On May 11, 1996, the ValuJet Airlines McDonnell Douglas DC-9 operating the route crashed into the Florida Everglades about ten minutes after departing Miami as a result of a fire in the cargo compartment caused by mislabeled and improperly stored hazardous cargo (oxygen generators).
The oxygen systems have sufficient oxygen for all on board and give the pilots adequate time to descend to below 8,000 ft (2,438 m). Without emergency oxygen, hypoxia may lead to loss of consciousness and a subsequent loss of control of the aircraft. Modern airliners include a pressurized pure oxygen tank in the cockpit, giving the pilots more ...
Oxygen is contained in a pressurized bottle located in the dorsal fin of the aircraft. The use of oxygen is only required for emergency in case of depressurization of the cabin or contamination of the cabin air. Oxygen is always available for the crew and can be made available to the passengers manually or automatically.