ECS System Flashcards
What happens to the outflow valves upon touchdown?
they go full open
If one outflow valve is in manual, will the other outflow valve operate in auto?
yes
Where/When can I observe cabin altitude and rate, landing altitude, and differential pressure?
Primary EICAS when:
- landing altitude in manual
- cabin altitude in caution or warning
- cabin differential pressure in caution or warning
- ECS or ENG selected on lower EICAS
Is there auto switching of cabin altitude controllers if one should fail?
yes
When does the cabin altitude waring siren sound?
excessive cabin altitude (greater than 10,000 ft)
What is the max allowable cabin differential pressure for takeoff and landing?
0.11 PSI
What is the max differential pressure?
9.4 PSI
How many positive pressure relief valves are there nd where are they located?
2 in E&E compartment (left front compartment)
Where are the negative pressure relief valves located?
side cargo door and forward and aft cargo doors
What is the temp range for the flight deck?
18C-29C
What does the manual position of the temperature controllers do?
sets the trim air valves manually
What will cause a zone system fault light to illuminate?
- temp zone duct overheat
- zone temp controller fault
- master trim air valve closed
- trim air switch off
- master trim air valve closed and pack air still flowing
What will cause a pack system fault light to illuminate?
- pack ovate or other system fault
- may illuminate briefly while switching between controller (auto or manual)
What happens when you press the trim air switch to off?
- master trim air valve closed
- pack output temp in backup as selected by Flt. Deck selector in auto
- no control of flight deck, upper deck, or main deck
- pack controller A only
On the ground, engines not running, where is Equip. Cooling exhaust air routed?
- into the lower forward cargo compartment when temp
< 7C - ducted overboard when temp > 7C
