Pneumatics, Aircon & Pressurisation Flashcards
How is the pneumatic nacelle shutoff opened?
De-energised open
How is the pneumatic HP shutoff opened?
Energised open
What does a bleed hot caution mean?
The HP and Nacelle shutoff valves close however De-ice air is still available
The trim valves are operated by the?
Cockpit temperature controller
Where does the radar get cooling air from?
Re-directed air from the ceiling and floor ducts
Selection of upper duct on the F/A panel distributes air to?
upper duct
Selection of lower duct on the F/A panel distributes air to?
Both upper duct and lower ducts
How do you know the avionics cooling fan has failed?
Orange light on the forward flight attendant panel
What happens if the cabin/FC duct hot caution light comes on?
A full cold signal will be sent to the temperature control valves.
Air con pack hot caution light has what effect?
The nacelle shutoff will close
How is the rear outflow valve opened?
De-ice pressure via motive flow suction
How is the forward outflow valve opened?
slipstream suction
What diff should you see at 5,000ft?
2.5 PSI
What diff should you see at 10,000ft?
4 PSI
