AMS Flashcards
What does the Air Management System (AMS) consist of?
The Controls and Indications, Bleed Air System, Air Conditioning System, Pressurization System and Limitations and EICAS messages.
What is the primary function of the AMS controller?
Provides primary control, fault detection, isolation and reporting for various airplane systems.
What systems does the AMS controller manage?
- Air condition controller
- Cabin pressure control
- Hot air leak detection
- Wing ice protection
- Equipment bay cooling and smoke detection
- Temperature and pressure control of the air entering the fuel tank inerting system.
Where are the controls for the air conditioning and pneumatics located?
On the overhead panel.
What does the RECIRC button do when pushed in?
Allows automatic operation of both recirculation fans by the AMS.
What happens when the XBLEED button is pushed in?
Allows automatic operation of the crossbleed valve by the AMS.
What does the MAN position of the pressurization MODE selector allow?
Manual control of the outflow valve.
What does the guarded DUMP switch activate?
Emergency depressurization.
What does the CABIN ALT selector’s UP position do?
Manually opens the outflow valve.
What does a HI FIELD indication signify?
The Cabin Altitude Warning set point has shifted from its original value of 9700 feet.
What does the ECS synoptic page provide?
A visual representation of the system operation and parameters.
How is bleed air provided to the Air Management System?
By the engines or the APU.
What are the uses of bleed air?
- Environmental Control System
- Engine start
- Engine anti-ice and wing anti-ice
- Water Tank pressurization
- Air Preparation System (APS)
What conditions must be met for the Engine Bleed Valve to be commanded open?
- Respective bleed switch is set to AUTO
- Respective engine bleed is available
- No fire is detected in the respective engine
- No bleed duct leak is detected.
What is the primary use of the APU in terms of bleed air?
Primarily as a ground pneumatic source for air conditioning packs and engine starting.
What happens when the XBLEED button is pushed out?
Manually closes the crossbleed valve.
What is the function of the Overheat Detection System?
Provides rapid and reliable overheat and leak detection for the engine bleed, APU bleed air distribution, and anti-ice supply ducting.
What is the role of the AMS Controller in bleed source selection?
Automatically selects the bleed source on ground and during flight between the engines, the APU, and the external connections.
What does SMART ECS do?
Controls the packs flow in normal operating conditions to improve fuel consumption.
What is the purpose of the Emergency ram air ventilation?
Provided in case of pack shutdown or for smoke removal.
What triggers the emergency ram air ventilation valve to open?
Both ECS cooling packs are commanded OFF or failed OFF, or the Dump push button is pressed.
What does the Cabin Pressure Control System (CPCS) control?
Cabin pressurization to provide maximum safety and comfort.
What are the two modes of operation for the CPCS?
Automatic and manual modes.
What does the Cabin Pressure Control System (CPCS) control?
Cabin pressurization and provides maximum safety and comfort during every segment of flight and ground operations.
