What is normal cabin altitude?

On commercial aircraft, the cabin altitude must be maintained at 8,000 feet (2,400 m) or less. Without pressurization, sufficient oxygen can be delivered up to an altitude of about 40,000 feet (12,000 m).

What is mean cabin altitude?

Definition. The cabin pressure expressed as an equivalent altitude above sea level.

What is maximum cabin altitude?

The regulations2,3 stipulate that the maximum cabin altitude should not exceed 8000 feet during normal operations, and, in fact, at usual cruising altitude the cabin altitude rarely exceeds 6000 or 7000 feet in a modern jet airliner.

How do you stop cabin altitude warning?

The cabin altitude warning horn will sound when the cabin altitude exceeds 10,000ft. It is an intermittent horn which sounds like the take-off config warning horn. It can be inhibited by pressing the ALT HORN CUTOUT button.

What does altitude do you need pressurization in cabin?

A cabin pressurization system typically maintains a cabin pressure altitude of approximately 8,000′ at the maximum designed cruising altitude of an aircraft [ Figure 1: ] This prevents rapid changes of cabin altitude that may be uncomfortable or cause injury to passengers and crew

What is the cabin altitude of commercial flights?

Cabin pressure varies with cruising altitude and type of aircraft. During a flight, the inside of a large commercial passenger air flights may range between 5000 to 9000 feet (~1525-2743 meters), occasionally higher or lower.

What altitude is an airplane cabin pressurized to?

Cabin air pressure. At typical cruising altitudes in the range 11 000–12 200 m (36 000–40 000 feet), air pressure in the cabin is equivalent to the outside air pressure at 1800–2400 m (6000–8000 feet) above sea level. As a consequence, less oxygen is taken up by the blood (hypoxia) and gases within the body expand.

Why are airplane cabins pressurized?

Airplanes cabin pressurization is the active pumping of air into an aircraft cabin to increase the air pressure within the cabin. Planes are pressurized as cruising altitudes are freezing and lack sufficient oxygen to breathe inside.