CP.X.B.K1
KnowledgeFundamental concepts of aircraft pressurization systems, including failure modes.
From the FAA library
- Chapter 7: Aircraft Systems › Pressurized Aircraft
addition, the pressurization system permits a reasonably fast exchange of air from the inside to the outside of the cabin. This is necessary to eliminate odors and to remove stale air. [Figure 7-41] Pressurization of the aircraft cabin ... necessary in order to protect occupants against hypoxia. Within a pressurized cabin, occupants can be transported comfortably and safely for long periods of time, particularly if the cabin altitude is maintained at 8,000 feet or below, where…
- Chapter 8: Flight Instruments › Impact Pressure Chamber and Lines
Impact Pressure Chamber and Lines The pitot tube is utilized to measure the total combined pressures that are present when an aircraft moves through the air. Static pressure, also known as ambient pressure, is always present whether an aircraft ... moving or at rest. It is simply the barometric pressure in the local area. Dynamic pressure is present only when an aircraft is in motion; therefore, it can be thought of as a pressure due to motion. Wind also generates…
- Chapter 8: Flight Instruments › Blocked Pitot System
change is not related to a change in airspeed but a change in static pressure. The total pressure in the pitot tube does not change due to the blockage; however, the static pressure will change. Because airspeed indications rely upon ... both static and dynamic pressure together, the blockage of either of these systems affects the ASI reading. Remember that the ASI has a diaphragm in which dynamic air pressure is entered. Behind this diaphragm is a reference pressure called static…
- Chapter 16: Cabin Environmental Control Systems › Control of Cabin Pressure › Pressurization Modes
mixed with the bleed air outflow from the turbine and is sent to the pressure vessel. Turboprop aircraft often use this device, known as a turbocompressor. [Figure 16-49] The most common method of pressurizing turbine-powered aircraft is with ... cycle air conditioning and pressurization system. Bleed air is used, and through an elaborate system including heat exchangers, a compressor, and an expansion turbine, cabin pressurization and the temperature of the pressurizing air are precisely controlled. This air cycle system…
- Chapter 16: Cabin Environmental Control Systems › Aircraft Pressurization Systems › Sources of Pressurized Air
Some early pressurized aircraft structures failed due to this and resulted in fatal accidents. The FAA’s aging aircraft program was instituted to increase inspection scrutiny of older airframes that may show signs of fatigue due to the pressurization cycle ... Aircraft of any size may be pressurized. Weight considerations when making the fuselage strong enough to endure pressurization usually limit pressurization to high performance light aircraft and larger aircraft. A few pressurized single-engine reciprocating aircraft exist, as well…