When is the DUMP button used?
Emergency evacuation; Smoke evacuation; fast cabin depressurization
When the DUMP button is pressed:
Packs and recirc fams turned off. Outflow valve set to 2000 FPM rise to 12,400 feet. Then cabin prssure rises by natural leak
The outflow valve can be modulated:
Manually; Automatically
Is the pressurization system still in the AUTO mode when the LFE is entered manually?
Yes
The pressurization system consists of:
Cabin Pressure Control System; Outflow Valve; Negative Pressure Relieve Valve; Positive Pressure Relief Valve; Static Port
In EPIC 25 cruise altitude automatically updates in the MCDU on PERF INIT page 3 if cruise altitude is changed in flight. T/F
“False”
Why does the DUMP button have a red raised border around it?
To make it easier to find in smoky conditions
Where does the CPCS (Cabin Pressure Control System) get Landing Field Elevation (LFE)?
FMS or manual entry
Will the DUMP button work when the pressurization switch is in manual mode?
No, but recirc fans and packs will be commanded off if it is pressed
The MAN mode on the PRESSURIZATION MODE SELECTOR allows manual control of what?
Outflow Valve
What two ways can the outflow valve be actuated?
Manually; Automatically
How can you determine the position of the outflow valve?
Outflow valve position indicator on MFD ECS synoptic page
In the Manual mode, will the cabin depressurize on landing?
No
What are the DOWN/UP positions used for on the CABIN ALT selector knob?
Manually opens/closes outflow valve
The LFE SELECTOR KNOB allows what?
Setting landing field elevation if destination airport is not in FMS database
How would you manually control the LFE?
Turn the LFE knob to up or down positions to increment by 100 feet at a time
What color is the LFE on the EICAS?
Green for FMS; Cyan for manual input
Where does the CPCS (Cabin Pressure Control System) get cruise flight level and landing elevation?
FMS before takeoff or CPCS uses ambient pressure or manually entered LFE
-
APU23
-
Air Conditioning14
-
Aircraft Familiarization4
-
Auto Flight19
-
Communication9
-
Doors and Windows10
-
Electrical54
-
Emergency Equipment18
-
Engines37
-
Fire Protection40
-
Flight Controls36
-
Flight Instruments22
-
Fuel37
-
Hydraulics35
-
Ice and Rain Protection33
-
Landing Gear and Brakes33
-
Lighting1
-
Limitations37
-
Memory Items8
-
Navigation11
-
Oxygen22
-
Pneumatics14
-
Pressurization18
-
Warning Systems19
-
Prior KV questions13
