Pressurization Flashcards

1
Q

If cabin pressurization is lost, the aircraft will enter the EDM if:

A

Autopilot is ON
Red CABIN PRESS LOW annunciated
Aircraft is > 40,000 MSL

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2
Q

What altitude will the EDM descend to?

A

15,000 MSL

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3
Q

When on the ground, the FLIGHT/LANDING switch will automatically switch to FLIGHT

A

At taxi speeds above 8 kts

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4
Q

On the ground with the FLIGHT/LANDING switch selected to FLIGHT how will the cabin pressurize?

A

Cabin will descend to 500’ below field elevation

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5
Q

How do you select between two cabin pressure controller channels?

A

By cycling the AUTO/MANUAL switch

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6
Q

The CABIN PRESS LOW message illuminates when

A
Four ways:
If landing field elevation is > 7,500'
If LFE is 7,500 - 9500'
If LFE is 9500-14,500'
In Manual - 10,000'
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7
Q

How does the pressurization controller switch channels?

A
  1. Cycling the AUTO/MANUAL switch

2. Opening the Cabin Door

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8
Q

The CPAM obtains altitude information from

A

Captain’s side ADM

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9
Q

The FLIGHT/LANDING switch changes to LANDING

A

During descent, change of altitude more than 1000’, or selecting LANDING on the cabin pressure control panel

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10
Q

What happens to the FLIGHT/LANDING mode if the aircraft levels off after descent begins?

A

The pressurization system will continue ot pressure the aircraft to a normal pressure for that altitude. However, the FLIGHT/LANDING switch will still indicate LANDING.

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11
Q

The CPAM obtains its landing field elevation information from:

A

The FMS or pressurization selector panel

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12
Q

In the SEMI mode, aircraft pressurization is controlled by:

A

Presetting all the information in the CABIN PRESSURE SELECTOR PANEL on the center console

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13
Q

How long does it take to open the PRV after landing in the AUTO/SEMI mode?

A

1 minute after outflow valve has fully opened.

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14
Q

Cabin Pressurization in the Manual mode is controlled by

A

manually manipulating the TROV via a DC motor

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15
Q

In a flight from a low altitude airport to a high altitude airport, how will the cabin pressurization system function?

A

Cabin will climb to 8,000’ until descent, when it will climb to field elevation

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16
Q

What are the cabin differential pressure limits?
Max
Min for taxi, takeoff, and landing
Baggage limits

A

10.48 PSI
0.3 PSI
>40,000 entrance limited to essential requirements

17
Q

When will the Pressure Relief Valve open?

A

If the TROV has failed, the PRV opens at 10.28 to 10.48 PSID. However during normal operations, PRV will open 1 minute after TROV has fully opened on the ground after landing.

18
Q

What is normally checked on the cabin pressure selector panel located on the center console?

A

Landing field elevation

19
Q

If taxiing, when does pressurization switch from LNDG to FLIGHT?

A

Above approximately 9 kts ground taxi speed

20
Q

What is the power source of the AUTO/SEMI selection switch?

A

Channel #1: ESS AC BUS

Channel #2: RT MAIN AC BUS

21
Q

How can you see which channel the pressurization controller is using?

A

ECS / PRESS or SUMMARY synoptic pages

22
Q

When will the Pressure Relief Valve open?

A

If the TROV has failed, it will start opening at 10.28 PSID or -0.25 PSID. Under normal conditions, it opens 1 minute after the TROV opens after landing.

23
Q

What is the approximate cabin alt and pressure differential at 51,000’

A

6000’ at 10.17 PSID

24
Q

When CPCP is in “AUTO”, there is a BARO COMM displayed in the Cabin Air Pressure selector (SEMI) panel. Where does that baro pressure come from?

A

The baro set in the captain’s side PFD.

25
Q

What is normal temperature exiting the precooler?

A

Normal Cruise - 400°F (40 PSI)

26
Q

PreCooler Outlet Temp with Single Bleed or Single Anti-Ice?

A

500°F

27
Q

Precooler inlet temp with Wing Anti-Ice ON

A

620°F

28
Q

What opens bleed air isolation valve under normal circumstances?

A

Start, or Crank Master
Manual selection
APU Air - ON

29
Q

What are the PSI trip points for 8th stage bleed valve?

A

Normal - 14PSI min
Low power - 25 PSI
High power - 35 PSI