21-30-00 PRESSURIZATION CONTROL Back
A. System Function
The pressurization control system (the system) controls the air pressure in the flight compartment and passenger cabin (the cabin pressure).
B. System Components
The primary components of the system are the:
The system controls the flow of air from the aircraft, to keep the difference between the cabin pressure and the external pressure (differential pressure), at 5.615 psi to 5.785 psi. This controls the altitude in the aircraft (the cabin altitude) in relation to the altitude of the aircraft above the ground (the aircraft altitude). This gives a maximum cabin altitude of between 7800 ft and 8200 ft at an aircraft altitude of 26,000 ft.
The pressurization control system (the system) controls the air pressure in the flight compartment and passenger cabin (the cabin pressure).
B. System Components
The primary components of the system are the:
- Cabin pressure controller (the controller)
- Electro-Pneumatic Outflow Valve (EPOV)
- Pneumatic Outflow Valve (POV)
- Cabin air filter
- Air jet pump
- Cabin-altitude rate-of-change indicator
- Cabin-altitude and differential-pressure gage
- Altitude low-pressure switch
The system controls the flow of air from the aircraft, to keep the difference between the cabin pressure and the external pressure (differential pressure), at 5.615 psi to 5.785 psi. This controls the altitude in the aircraft (the cabin altitude) in relation to the altitude of the aircraft above the ground (the aircraft altitude). This gives a maximum cabin altitude of between 7800 ft and 8200 ft at an aircraft altitude of 26,000 ft.
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