Air Management Flashcards
List the items that use bleed air.
Environmental control system (ECS), engine start, engine wing and horizontal stabilizer anti-icing system, cargo heating system (optional) and main cabin door pressurization seal. AOM 9-02-40
When is the cabin temperature control transferred to the VIP seat panel?
When the detent C is selected to the PAX CABIN TEMPERATURE CONTROL KNOB. AOM 9-02-30
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 the amber light. AOM 9-02-30
When is the Outflow Valve (OFV) indication on the Environmental Control System (ECS) synoptic page displayed?
It is only available on the ground. AOM 9-02-30
What are the potential sources of bleed air that the Pneumatic System Controller (PSC) can automatically
select from?
Engines, the APU and external connections. AOM 9-20-40
Is it possible to have bleed from the APU and the engines simultaneously?
No. AOM 9-02-40
During normal operation on the ground and for taxiing, what is the primary source of bleed air?
The APU. AOM 9-02-40
What is the primary source of bleed air in flight?
The engines. AOM 9-02-40
When will the bleed air source be automatically transitioned to the engines?
When the airplane starts running for takeoff (engine TLA’s higher than 50 degrees) AOM 9-02-40
The XBSOV (cross bleed shut off valve) is automatically commanded to close for what conditions?
In case of bleed leakage, over pressure, engine fire or if a failure condition is identified. AOM 9-02-40
Can an external ground connection be used to supply pressurized air for an engine start?
Yes. AOM 9-02-40
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. AOM 3-01-35
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° C. AOM 9-02-50
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° C. AOM 9-02-50
What happens to the recirculation fan during fast cooling and fast warming operations?
It automatically sets a higher speed to optimize system performance. AOM 9-02-50
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. AOM 9-02-50
What is ram air ventilation used for?
Non-pressurized flight or for smoke evacuation. AOM 9-02-50
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. AOM 9-02-50
How can the emergency RAM air door be manually commanded to open?
Through the DUMP button on the PRESSURIZATION control panel. AOM 9-02-50
How is the Cargo Heating System operated?
Automatically by the PSC. AOM 9-02-55
When is the main cabin door pressurized seal inflated?
After takeoff. AOM 9-02-60
How can the outflow valve be modulated?
Either automatically or manually. AOM 9-02-70
What position are the Negative and Positive Pressure Relief Valves (NPRV and PRV) normally in?
Closed. AOM 9-02-70
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. AOM 9-02-30
What is the cabin altitude rate of change when moving the CABIN ALT knob UP or DN?
50 FPM steps. AOM 9-02-30
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 2,000 ft/min up to 12,000 ft and the emergency RAM air door is opened. AOM 9-02-70
What happens when the DUMP button is pressed in the manual mode of operation?
The outflow valve will be commanded to full open until either the command is removed or the altitude limit function disables it when the cabin altitude reaches 14,800 ft +/- 200 ft. The emergency RAM air door is also opened. AOM 9-02-70
What is the maximum differential pressure for a 6,000 ft cabin altitude? For a 5,800 ft cabin altitude?
9.64 psid; 9.73 psid AOM 2-48
What is the maximum differential overpressure?
10.4 psid. AOM 2-48
What is the maximum differential negative pressure?
0.5 psid. AOM 2-48
What is the maximum differential pressure for takeoff and landing?
0.2 psid. AOM 2-48
