Praetor Air Management Flashcards
List the items that use bleed air
Environmental Control System (ECS),
Engine Start,
Engine Wing and Horizontal Stabilizers Anti-icing system,
Cargo heating system (optional),
Main Cabin Door Pressurization Seal
When is the cabin temperature control transferred to the VIP seat panel?
Whe the detent C is selected to the PAX CABIN TEMPERATURE CONTROL KNOB
In the event of a bleed leak detection, what light will illuminate in addition to an associated CAS message?
The PACK, BLEED 1, BLEED 2, or APU BLEED amber light
When is the Outflow Valve (OFV) indication on the Environmental Control System (ECS) synoptic page displayed?
It is only available on the ground
What are the potential sources of bleed air that the Pneumatic System Controller (PSC) can automatically select from?
Engines, the APU and external connections
Is it possible to have bleed from the APU and the engines simultaneously?
No
During normal operation on the ground and for taxiing, what is the primary source of bleed air?
The APU
What is the primary source of bleed air in flight?
The engines
When will the bleed air source be automatically transitioned to the engines?
When the airplane starts running for takeoff (engine’s TLS’s higher than 50 degrees)
The XBSOV (cross bleed shut off valve) is automatically commanded to close for what conditions?
Bleed leakage, over pressure, engine fire or if a failure condition is identified
Can an external ground connection be used to supply pressurized air for an engine start?
Yes
If an external pneumatic power source is being used and is not adjustable, what range should the pressure supply be in?
Between 32 psi and 60 psi
When is fast cooling enabled on hot days?
When the difference between the cockpit/cabin temperature set point and the cabin/cockpit zone temperature is equal to or higher than 6 degrees Celsius
When is fast warming enabled on cold days?
When the difference between the cockpit/cabin temperature set point and the cabin/cockpit zone temperature is equal to or higher than 6 degrees Celsius.
What happens to the recirculation fan during fast cooling and fast warming operations?
It automatically sets a higher speed to optimize system performance
If the air-conditioning pack fails what does the PSC automatically do?
It engages the pack backup operational mode and controls cabin and cockpit temperature
What is ram air ventilation used for?
Non-pressurized flight or for smoke evacuation
When will the PSC command the emergency RAM air door to open?
In case of loss of the air condition PACK and the PACK backup systems.
How can the emergency RAM air door be manually commanded to open?
Through the DUMP button on the PRESSURIZATION control panel
How is the Cargo Heating System operated?
Automatically by the PSC
When is the main cabin door pressurized seal inflated?
After takeoff
How can the outflow valve be modulated?
Either automatically or manually
What position are the Negative and Positive Pressure Relief Valves (NPRV and PRV) normally in?
Closed
What does pushing in the MODE selector button on the PRESSURIZATION panel allow for?
Manual control of the pressurization system through the CABIN ALT knob
What is the cabin altitude rate of change when moving the CABIN ALT knob UP or DN
50 FPM steps
What happens when the DUMP button is pressed in the automatic mode of operation?
The cabin is depressurized at a constant rate of change of 2,000ft/min up to 12,000ft and the emergency RAM air door is opened
What happens when the DUMP button is pressed in the manual mode of operation?
The cabin rate of change will increase with the duration of the dump command; until either the command is removed or the altitude limit function disables it when the cabin altitude reaches 14,800ft +/- 200 ft. The emergency RAM air door is also opened
What is the maximum differential pressure for a 6,000 ft cabin altitude? For a 5,800 ft cabin altitude?
9.64psid; 9.73 psid
What is the maximum differential overpressure?
10.4psid
What is the maximum differential negative pressure
-0.5psid
What is the maximum differential pressure for takeoff and landing?
0.02psid
