11.4 Flashcards
Air Con
what is an air con pressure regulator known as
bleed valve
what regulates pressure in cabin
outflow valve
what supply sources are used
apu , engines , ground power air supply
role of pneumatic controller
monitor pressure and temp
register leaks to monitor operation of pneumatic components
how does vapour cycle machine cool pneumatic flow
special cooling fluid is compressed and expanded in a closed unit
what does recirculation system do
recirculates cabin air to reduce the pack airflow
best condition for aircraft in regards to pressurisation
no pressurisation in flight
why does outflow valve have 2 ac motors and 1 dc motor
each pressure controller can control its own AC motor , if AC not available DC can control the valve
what conditions cause equipment cooling system to override operation to happen
component failure or smoke detected
what happens if cabin altitude is over 15000 ft
outflow valve automatically closes
How is cabin pressure regulated
Outflow valves
When do outflow valves close
Automatically at 15000ft
What is the main air supply for aircon
Pneumatic
What is the air cycle machine driven by
Turbine
What’s the function of the pack valve
Control airflow into the cabin
