E-170/175 Air Management System Flashcards
What is part of the Air Management System?
WHEEEP
- Water pressure
- Hot air leak detection
- ECS
- Engine Start
- Engine and wing Anti-ice
- Pressurization
Pressurization system consist of?
- Cabin outflow valve
- Static pressure port
- Negative pressure relief valve
- Positive pressure relief valve
- Cabin pressure controller
What provides air for the AMS?
- Engine bleeds
- APU bleeds
- External pneumatic source
What is external pneumatic air used for?
- ECS on the ground
* Engine start on the ground
Where is the external ground source panel located?
• Lower fairing between the wings
What is the primary use for APU bleed air?
- ECS on the ground
- Engine start on the ground
- Assist with engine start (< FL210)
- Bleed source for pressurization, heating and cooling (< 15,000 ft MSL)
How many bleed regulating valves are in each engine?
• 2
1 high stage bleed and 1 engine bleed
How would an APU or engine bleed button show a detected leak?
• An amber light illuminates
What does the overheat detection system (ODS) observe? PEAT
- Engine bleeds, packs (AC ducts)
- APU bleed
- Plumbing for the wing and engine anti icing system
- Trim air
How many ECS packs are on the aircraft? What provides air for the pack?
- 2 independent packs (left and right)
* Each engine provides bleed air to its respective pack
Can a single pack provide adequate temperature control and pressurization?
• Yes up to FL310
What is the max altitude for a single pack operation?
• FL310
Where do the packs distribute air to?
- Pack 1- flight deck/cabin
* Pack 2- cabin
Can a single bleed source power both packs?
• Yes, through a crossbleed valve
How many recirculation fans recirculate air back into the cabin/flightdeck?
• 2
Which cargo bays have ventilation fans?
• Forward
What cargo compartment may we transport live animals?
• Forward because it has air recirculation
Pushing out the RECIRC buttons turns off?
• Both recirculation fans
Can the APU bleed be used for the anti ice system?
• No
What happens when the XBLEED button on the panel is pushed out?
• It manually closes the crossbleed valve
The DUMP switch is used for?
- Emergency evacuation
- Fast cabin depressurization
- Smoke evacuation
What happens when the DUMP button is pressed?
- Sets the ECS packs and recirculation fans to OFF.
- Controls the outflow valve to maintain the cabin altitude rate of climb at 2000 ft/min up to 12,400 ft.
- When the cabin altitude reaches 12,400 ft it commands the outflow valve full closed.
With respect to the DUMP button, which functions are available in Manual mode?
• When pressed, packs and recirc fans will shut down.
Why does the DUMP button have a red-raised border around it?
• So you can find it in low visibility conditions in the flight deck.
The Outflow valve can be modulated ________ or ________?
• automatically or manually
The MAN mode position allows manual control of:
• Outflow valve
How can you determine the position of the outflow valve?
• There is a pointer on the outflow valve position indicator on the environmental control system (ECS) synoptic page on the MFD.
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 closes/opens the outflow valve to decrease/increase cabin altitude.
What is the LFE CTRL selector position on the pressurization MODE selector knob used for?
• If not available from the FMS data base, allows manual input of the landing field elevation.
Is the pressurization system still in the AUTO mode when LFE is entered manually?
• Yes.
Where does the CPC get Landing Field Elevation (LFE)?
• FMS and if not available from the FMS data base, LFE must be manually selected on the
pressurization panel.
How would you manually control the LFE?
• Momentarily move the LFE selection knob UP or DOWN.
How is a manual input for LFE displayed on EICAS?
• A cyan “M” in front of the altitude readout.
What does the ATTND position do on the PAX CABIN knob?
• Switches over the cabin temperature control to the Flight Attendant control panel(s).
What is the memory item for Cabin Altitude Hi?
- OXYGEN MASKS…Verify…ON, 100%
* CREW COMM …ESTABLISH
