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An explosive depressurisation is one which occurs in less than half a second.

A rapid Decompression - which occurs rapidly but at a rate which is less than the rate by which the lungs can decompress and, therefore, does not result in damage to the lungs.

A gradual (or subtle) depressurisation occurs over a long period time and, due to the gradual change in air pressure

Hypoxia is defined as a lack of oxygen in the body tissues.

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Consequence – последствие

Structural failure - потеря несущей устойчивости строительных конструкций; поломка

Explosive - взрывной

Rapid – стремительный, быстрый

Gradual - постепенный

Be buffeted – быть ударенным

Be dazed - быть ошеломленным

Debris - обломки

Being sucked out - быть высосанным из

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Aircraft Pressurization Explained! And what happens when we lose it?

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Answer the questions

What is a depressurization?

How can be “an accident” defined?

What types of depressurizations are included in classification? And which is the most serious one? What are the consequences?

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Blue Gradients Basic Simple Presentation (1)

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Real situation in which you may observe what is hapenning

Which aircraft had loss of cabin pressure?
Which altitude did the cabin crew ask for?

Did they need any assistance?

Did the aircraft declare an emergency?

How many passengers were on board?

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CABIN DEPRESSURIZATION | Delta B739 Emergency Landing at Vegas

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When can loss of cabin pressure occur?

What are the possible consequences of depressurization?

What actions must perform the cabin crew if they find out pressure failure:

in airport

during taxi

during take off

at the normal cruising altitude?

What is a hypoxia?

How is classifies loss of cabin pressure?

Which type of depressurization on your point of view is the most hazardous?

What are the most famous Accidents and Incidents Involving Loss of Pressurisation?

How can cabin crew detect loss of cabin pressure?

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Read an article to learn more about depressurization

What Is Cabin Depressurization

Depressurisation of the aircraft cabin as a result of structural failure, pressurisation system malfunction, an inadvertent crew action or a deliberate crew intervention. Loss of pressurisation is a potentially serious emergency in an aircraft flying at the normal cruising altitude for most jet passenger aircraft.  Loss of cabin pressure, or depressurisation, is normally classified as explosive, rapid, or gradual based on the time interval over which cabin pressure is lost.

The cabins of modern passenger aircraft are pressurised in order to create an environment which is physiologically suitable for humans (Aircraft Pressurisation Systems). Maintaining a pressure difference between the outside and the inside of the aircraft places stress on the structure of the aircraft. The higher the aircraft flies, the higher the pressure differential that needs to be maintained and the higher the stress on the aircraft structure.

A compromise between structural design and physiological need is achieved on most aircraft by maintaining a maximum cabin altitude of 8,000 ft. What is cabin depressurization.

What happens during cabin depressurization?

When a cabin depressurizes, the percentage of oxygen in the air stays about the same, but the molecules get further and further apart, Padfield explained. “Imagine a balloon at sea level, then take it up to 10,000 feet. The balloon gets bigger because there is less pressure pushing in against it,” he said.

Can you survive cabin depressurization?

Without cabin pressurization or supplemental oxygen to breathe at such altitudes, flight crews and passengers would quickly be overcome by hypoxia — oxygen starvation — followed rapidly by unconsciousness. Death would occur soon afterward.