Term
| What is the function of the Air Management System Controller, (the dualchannel, software based, electronic digital controller)? |
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Definition
It continuously monitors the performance of the pneumatic system components,
the WHSAIS as well as the airflow schedule of the ACS and maintains system
functionality through system logic. |
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Term
| What sub-systems are considered pneumatic? |
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Definition
| Air conditioning, cabin pressurization, wing and horizontal stab anti-ice system |
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Term
| How is the bleed system controlled? |
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Definition
| By two bleed Pressure Regulating Shutoff Valves (PRSOV) located in each pylon. |
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Term
| What are the functions of the two Pressure Regulating Shutoff Valves (PRSOVs)? |
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Definition
They regulate the hot bleed air released to the ECS and AIVs and provide a
firewall shutoff capability for the bleed air lines. |
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Term
| What would you expect regarding the AMS if the temperature were above 30c? |
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Definition
A white crew awareness CAS message stating that one or both bleed valves has
closed, which can be verified on the ECS schematic page. |
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Term
| Does a PRSOV automatically close in case of a single engine takeoff condition? |
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Definition
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Term
Can the remaining bleed air then supply all of the bleed air required by the
system? |
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Definition
| Yes, via the Cross Bleed Valve, (XBV). |
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Term
| How can the pilot override the RH PRSOV to the closed position? |
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Definition
| By placing the pneumatic Bleed 2 toggle switch to the OFF position. |
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Term
| What does turning the ECS knob to OFF VENT do? |
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Definition
Opens the Ram Air Valve (RAV) in the rear fuselage providing fresh air to both the
cabin and cockpit, closes both FCSOVs (ECSs), and closes both PRSOVs (bleeds). |
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Term
| What two modes control cockpit and cabin temperature? |
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Definition
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Term
| How does the crew transfer cabin temp control to the passengers? |
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Definition
| By dialing the Cabin Temp Knob full counter-clockwise into the detent. |
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Term
| How is temperature of the air to the cabin controlled? |
|
Definition
Temperature Modulating Valves (TMVs) mix cooled air from the heat exchangers
with hot bleed air based on temperature selection on the cockpit control panel |
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Term
| What is the function of the Vapor Cycle System, (VCS)? |
|
Definition
Provides cooling air for the cabin and cockpit and is operated automatically by the
ECS controller. (The VCS uses a refrigerant, evaporators, condenser and a fan to
produce the cold air). |
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Term
| When can the VCS be operated on the ground? |
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Definition
| With GPU power, or one engine operating. |
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Term
| What is used to cool the heat exchanger? |
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Definition
| Ground cooling fan on the ground or ram air in flight. |
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Term
For the pressurization system to operate automatically, what input is required
by the flight crew prior to departure? |
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Definition
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Term
| What is the purpose of the Dump Button? |
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Definition
Provides cabin depressurization by opening the outflow valve. If pressed a second
time, the system returns to normal. It also turns off the recirculation fans. |
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Term
| Where is the Outflow Valve located? |
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Definition
| It is mounted on the aft pressure bulkhead . |
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|
Term
| What is the purpose of the negative and positive relief valves? |
|
Definition
They are designed to prevent over or under pressurization of the fuselage; they are
not actuated during normal operation. |
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