Pneumatic, Air Conditioning, & Pressurization Flashcards
With the destination altitude below 7850’ when does the CABIN ALTITUDE CAS illuminate?
- Caution at 8500’
- Warning at 9400’
Flying into Telluride (KTEX) the CABIN ALTITUDE WARNING HIGH (A) CAS illuminates. How does this affect the CABIN ALTITUDE (C) and (W)?
- Increases Caution to Field Elevation +650’
- Increases Warning to Field Elevation +1550’
What is the IASC and how many are there?
Integrated Air System Controller
- Controls all pneumatics (Environmental and Anti-Ice) and leak monitoring
- 2 controllers, each with 2 channels
How many Outflow Valves are there?
1
Where is the Outflow Valve located?
Below the right wing leading edge, behind right landing light
How is the Outflow Valve opened and closed?
Electrically by servo motors
How many (pressurization) safety valves are installed and where are they located?
Two on the aft pressure bulkhead
What is the function of the (pressurization) safety valves?
To provide overpressure and negative pressure relief
Do the (pressurization) safety valves require electrical power to operate?
No, they are pneumatically operated and spring loaded closed
Does the environmental system use IP air or HP air?
IP (intermediate pressure) - regulated to 50 PSI
Most valves in the bleed and air conditioning system are controlled and actuated by?
Electrically controlled and Pneumatically actuated
What two valves are electrically actuated?
Outflow valve and avionics cooling valve
What does the Ozone Converter do?
Converts the Ozone from the IP bleed air into O2 to combat fatigue and dehydration
When the START switch is selected, what happens to the Flow Control Valves?
They automatically close to shut down the air conditioning system, allocating all bleed air to the Starter (ATS)
When does the ditching switch become active?
Below 15000’ the outflow valve opens on a depressurizing schedule. When pressurization delta P is zero, then the outflow valve closes to prevent water from entering.
