Air Management System Flashcards
(29 cards)
What are the two components of the AMS?
The pneumatic system
Environmental control system (ECS)
Cabin pressure control system is included but has a separate controller
The AMS controller provides primary control for what systems? (5)
Bleed control Environmental control Hot air leak detection Crew O2 Monitoring Wing and engine ice protection
(T/F) The two channels are independent of one another and should one fail the entire channel is lost
False. Both channels can fully cover the other, should one fail
What are all the sources for pneumatic air?
Engine bleed air
APU bleed air
External pneumatic source
The pneumatic air is used for what 4 jobs?
Engine starting
Anti Ice system
Environmental control system
Water pressurization system
Low pressure bleed air comes from what stage of the engine?
Stage 6
High pressure bleed air comes from what stage of the engine?
Stage 10
What is the purpose of the low stage bleed check valve
Prevents reverse flow of high pressure bleed air back into the engine at the low pressure supply port
The engine bleed valve regulates pressure at __ power settings
High
What does a white bar on either engine bleed buttons, or the APU bleed button mean?
The check valves are closed and the system is not supplying pneumatic air
If more than one bleed air source is available the AMS logic uses what priority?
Onside engine
Opposite engine
APU, if available
(T/F) The APU bleed air can be used for the anti ice system in flight
False
The ECS packs 1 and 2 shall be closed if any of what conditions exist? (7)
- A bled air source is not available for the pack
- The respective pack button is off
- Any engine is starting and weight-on-wheels is true
- The respective engine is starting, wight-on-wheels is false and the opposite engine is not starting
- Any engine is starting AND APU is the bleed source
- Respective bleed system duct leak
- Respective packs BIT shutdown failures are present (PACK 1(2) FAIL EICAS message displayed)
The two ECS packs are installed where?
In the two wing to fuselage fairing
The air reaching the cockpit and cabin is approximately __% fresh air and __% recirculated air
52% fresh
48% Recirculated air
The recirculation fans will automatically turn off if ___ or ___
The pressurization dump button is pressed
or, smoke is detected in the recirculation bay
The gasper shutoff valve will automatically open whenever the gasper air supply exceeds __C (__F)
35 C
95 F
(T/F) Live animals can be placed into both cargo bays
False. They must be in the FWD cargo bay because it is the only one with a recirculation fan
The pack 1 ram air valve will automatically open when: (3)
The airplane is in flight
Pack 1 and 2 are commanded OFF or failed
The airplanes flight altitude is less than 25,000 feet
(T/F) Passenger cabin temperature must be controlled by the pilots
False. The pilots can select manual FA control on the ECS panel
The Cabin Pressure Control System (CPCS) 5 main components are:
Cabin Pressure Controller (CTR) Cabin outflow valve Negative pressure relief valve Positive pressure relief valve Static port
The positive pressure relief valve opens independently whenever differential pressure exceeds ___ PSID
8.8 PSID
The negative pressure relief valve limits the negative differential pressure to ___ PSID
-0.5 PSID
A CABIN ALTITUDE HI message illuminates whenever the cabin altitude is above ____ ft
9,700
