Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
What area of the aircraft does the right hand pack normally supply air to? What area does the left hand pack supply?
|
Left Pack – flight deck
Right Pack – passenger cabin Both packs are located in the aft equipment bay |
|
What supplies cooling air to the heat exchangers?
|
Ram air scoop
|
|
When is RAM AIR ventilation used?
|
When 10th stage bleed air is lost, contaminated, or disabled
|
|
How is flight compartment exhaust air routed out of the aircraft?
|
TO cabin – Distribution Manifold
FROM cabin – outflow valves |
|
What controls cabin air outflow?
|
Outflow valves on aft bulkhead regulate vacuum pressure to cycle valves
CPCs control amount of pressure (2 CPCs, one active at a time) |
|
What is the source of vacuum for the outflow valve?
|
Outside air for outflow valves
Jet pump driven by 10th stage bleed air to create vacuum and actuate the valves |
|
The pressurization system automatically pre-pressurizes the aircraft to what altitude prior to takeoff?
|
-150ft pressure at ~300fpm
|
|
What is the rate of change of the cabin altitude during climb and descent in the pressurization system in automatic mode?
|
300-500fpm increase when ascending
300fpm decrease when descending, down to 150ft below field elevation 500fpm increase when throttle idle with WOW detected – very short, then valves full open 1000fpm+ decrease when descending in flight abort mode |
|
Maximum negative differential pressure is controlled at what pressure?
|
-0.5 PSI
|
|
What does the CPAM automatically do if the cabin altitude reaches 14,000 feet?
|
Disables use of bleed air crossflow for engine start (engine starts not permitted above 13,000ft)
|
|
What happens when the pressurization control switch/light is pressed in?
|
Engages manual cabin pressure control
|
|
What happens when the EMER DEPRESS switch/light is pressed in?
|
Opens both outflow valves to rapidly depressurize the aircraft (uncontrolled depressurization)
|
|
What happens when the manual cabin altitude regulator is selected to the up or down position?
|
Manual pressure change occurs at set rate
|
|
When in Manual (MAN) mode where is the pressurization readout displayed?
|
ECS screen on EICAS
|
|
What fire detection systems are used in or around the wing anti-icing system?
|
Single loop overheat detector in fuselage and thermal switches in wing leading edges, also leak detection using bleed air ducts called piccolo tubes
|
|
How does the air cycle machine work?
|
Turbine powered air conditioner
|
|
How many Packs does the CRJ-100/200/600/700 have?
|
2
|
|
What stage does CRJ bleed air come from?
|
10th
|
|
How many outflow valves does the CRJ have?
|
2
|
|
What does EMER DEPRESS do?
|
Opens both outflow valves to rapidly (uncontrolled) depressurize aircraft
|
|
"Packs"
|
Air conditioning units under pressure from 10th stage bleed air
|
|
"CPC"
|
Cabin Pressure Controller
Monitors cabin pressure and regulates relevant valves |
|
"CPAM"
|
Cabin Pressure Acquisition Module
Provides data regarding cabin pressure to EICAS |