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Depressurization

October 20, 2014 English for Pilots, Listening, Reading No Comments

[audio:https://aviationenglishblog.com/wp-content/uploads/2010/08/16depressurization.mp3|titles=Depressurization]Depressurization – The Need, Types and Management

 

Depressurization is the reduction of air pressure in the cabin of an aircraft. Sudden depressurization can result from a failure in the pressurization system, a structural failure or can be initiated deliberately by a crew member of the aircraft.

Failure of the pressurization system is the most common cause of sudden depressurization. Malfunction of the engine or compressor, structural failures like incomplete or faulty sealing of doors, windows or cabin wall follow.

It is necessary to know why the cabin is pressurized in the first place to appreciate the importance of the task. Aircrafts fly at high altitude to avoid bad weather and turbulence. The air pressure at such high altitudes is extremely low and can make the human body uncomfortable. As the air pressure reduces, the pressure of the blood in the veins tends to rise and cause headaches, ear aches and other issues. It is essential to control the air pressure at such high altitudes to ensure that the human body stays comfortable. During landing the pressure is gradually lowered to match the air pressure outside.

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