Air Conditioning and Presurization Flashcards
Memory Items:
- Oxygen mask - Use
- BLEED switch - Check/Correct
If possible: - TRQ - Reduce
>Fly the airplane<
- BLEED switch - OFF/RST
- BLEED switch - AUTO
Memory Items:
- Oxygen masks . . . . Use
Memory items:
Emergency Descent Mode CAS message:
1. Item
- Oxygen masks . . . . Use
ECS—Environmental Control System, the 3 sub-system are:
- EBAS—Engine Bleed Air System
- CPCS—Cabin Pressurization Control System
- TCS—Temperature Control System
The purpose of the EBAS—Engine Bleed Air System: is to:
(Three items)
- Regulate the bleed air from the engine.
- Ensure a controlled airflow in the cabin.
- Adjust the bleed air temperature for cabin heating.
The 2 Bleed Status messages that can be displayed on the Single Engine Indicator (SEI):
- P2.5 HI (P2.5 port exceeds 7 pounds per minute).
- P3 (P3 port is open).
The Cabin Air Controller—CPCS, controls the modulation of…
…the OutFlow Valve (OFV)—to reach the computed cabin altitude.
For proper operation of the Cabin Pressurisation Control System, the bleed switch must be in which position…
…must be in AUTO position.
Cabin Air Controller will manage the cabin altitude to reach the:
LFE—Landing Field Elevation, by 1,500 ft AGL to landing.
The 2 independent air circuits for the Temperature Control System (TCS) are…
Cabin Heating System—CHS
Vapour Cycle System—VCS
Automatic load shedding feature when MAIN GEN is ON:
- Turns off the Ground Fan.
- Turns off the Condenser Fan.
- Opens the compressor clutch.
Automatic load shedding feature during engine start:
Turns off the Vapor Cycle System.
Maximum Altitude
31,000 ft (9,449 m)
Maximum Differential Pressure
6.2 psi
Maximum Cabin Altitude
9,350 feet
What does the NORM/DUMP switch do?
- NORM, the cabin is automatically depressurized as soon as the airplane is on ground through landing gear switch.
- DUMP, the “DUMP” switch allows the pilot to open the Out-FlowValve in order to de-pressurize the cabin.
The OFV is fitted with a cabin altitude limitation device which…
Overrides the “DUMP” function and forces the closure of the OFV if the cabin altitude reaches 14,500 ft.
Indicates that the cabin altitude is over 10,000 ft.
Indicates that the cabin differential pressure is over 6.4 psi ± 0.2 psi.
Indicates that, due to an electrical failure or a loss of communication with the avionics, the Cabin Air Controller is unable to compute optimal cabin altitude. In this condition, the CPCS will control the cabin altitude to a default value of 9,800 ft.
Indicates that the cabin pressurization is degraded without total loss of cabin pressurization, or that the heating system is degraded.
Emergency air control, “EMERGENCY RAM AIR” selector, enables outside air to enter the cabin through a valve.
TRUE or FALSE?
TRUE
Reduce the cabin differential pressure to be able to pull out the EMERGENCY RAM AIR control knob. If necessary, depressurize the cabin.
