Depressurization

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Depressurization

A condition that occurs when the air pressure inside a structure is lower that the air pressure outdoors. Depressurization can occur when household appliances that consume or exhaust house air, such as fireplaces or furnaces, are not supplied with enough makeup air. Radon may be drawn into a house more rapidly under depressurized conditions. Backdrafting of furnaces and vented appliances can also occur with depressurization, introducing exhaust gases into the house.
References in periodicals archive ?
It was within this context that I conducted an Operational Check Flight for an aircraft that had a recent history of environmental control system and cabin pressurization failures along with pilot reported hypoxia events.
Pilots are supposed to check that the cabin pressurization is correctly set before takeoff, but there have been cases where they have forgotten to do that or the pressurization level has been improperly set, said Goglia, a former National Transportation Safety Board member.
Back in March 2012 Kenya Airways experienced another mishap with one of their flights when it took off from OR Tambo International Airport in Johannesburg but had to turn back 2 hours later following a cabin pressurization malfunction.
In one event, a loss of cabin pressurization accompanied the noise.
The cabin pressurization dump switch was in the dump position.
Structural Fatigue testing of aircraft is designed to simulate typical daily stresses such as take-offs and landings, turns and climbs, turbulence, cabin pressurization, and other common loads.
High-altitude flight is practical because of cabin pressurization systems introduced in such planes as the Boeing 307 Stratoliner and Lockheed 049 Constellation.
There was a decompression explosion, all cabin pressurization was lost and the refueling control stick went flying out the back.
Trace the steps that a passenger takes from the moment the airport is entered: the long walks to departure gates; the anxiety incurred in awaiting embarkation and in being confined to a waiting area always too small for the number of passengers; the lack of space afforded by seating, ideal only for a small woman weighing less than 100 pounds; and the sudden cabin pressurization equivalent to an altitude hundreds of times more than ground pressure.
conventional alloys, and allow increased cabin pressurization for enhanced passenger comfort, on par with all new aircraft structures in development today.
Because of time-to-climb limitations and cabin pressurization levels, most P210 pilots told us they prefer cruising below 20,000 feet--at 14,000 to 19,000 feet on average.
The cabin pressurization and control system is liable for regulating pressure in the aircraft cabin during flight.