What does the norm

position on the cabin

press mode panel means?

Rate selector knob acts as a rate limiter

Cabin adjust as needed as

selected by the rate knob

What will be the cabin

altitude at FL 470?

7500 Feet

What does the "alt sel"

position on the cabin

press mode panel mean?

Acts as an altitude hold mode

What altitude will the cabin

climb to if cabin dump

is selected?

Cabin will stop at 14500 feet

What powers the

dump switch?

 Main DC

What are the two independent system of the pressurization?

Auto

(main DC)

Manual

(mechanical)

Can you use auto or

manual mode at

the same time?

No because they share the

same outflow valves

Which of the two modes

 (auto and manual) have

priorities on the outflow valves?

Auto mode

What are two different

ways of using the auto mode?

a) Norm (give auto shedule)

b) Alt sel (Set cruise altitude)

How many FPM do you

get by setting the

rate to the pip?

Climb at 500 FPM

Descent at 300 FPM

What happens to the

outflow valves while

taking off?

Close with throttles at 82% N2

Cabin descent at "R" selection no more than 180' below field altitude

What happens if

landing pressurized?

Cabin will dump after 60 seconds

How does the pressurization

work in high altitude mode?

Once descending 1000' below cruise altitude,

cabin will rise to 8,000 and stay

there until FL 245.

Then the cabin rise to destination

What does the yellow

press fault mean?

a) Pressurization has switched to manual due to internal fault

b) Or loss of main DC

What should you do first

before using the cherry picker?

Set the knob to min (300FPM)

as opposed to max (800FPM)

How can you test

the fault light?

Switch to manual, then back to auto

Should illuminate for 1.5 second

How are the outflow

valves used in manual?

Secondary valve act as primary

Does the switch "norm/alt"

work in manual?

No, automatic function only

What happens to the outflow

valves with loss of DC?

Disable primary, locks secondary

to current pressure

What is the purpose of the auto/norm switch?

Auto schedule mode

How do you use

alt/sel switch?

Example: set 4000' cabin pressure

Make sure to not cruise over FL 350

according to the scale

What is the advantage of

using the alt/sel switch?

Cabin PSI will be at 9.5, a bit better than auto schedule set for 9.3

When do you use

manual mode?

a) Select it

b) Shed electricity

c) Fault light

What altitude do you

see cabin altitude?

8000 feet message

What altitude do you

see cabin altitude?

8500 feet message

What altitude do you

see cabin altitude?

10,000 feet message

What are two limiters

on outflow valves?

a) Cabin altitude- 14,500'

b) Max differential pressure- 9.6 PSI

What is the memory item

for a loss of cabin pressure?

1) Don the masks and 100%

2) Left and right MIC SEL to mask

3) Emergency descent

What is the memory item

for an emergency descent?

Initiate max rate of decent

to a safe altitude

How long does it take for

the outflow valves

to go full deflection?

10 to 20 seconds

What happens if a pilot forget

to set destination airport

elevation on controller?

Cabin altitude will follow descent

rate for the last 2000 feet

Where does the cherry

picker take its pressure from?

Outside vacuum from tube

located inside nose compartment

What is the max altitude

you can get this message:

HP valve fail L-R?

Since HP is always on above FL 370,

this message will only occur

at or below that altitude

When is "bleed select not

norm L-R" amber or cyan?

Amber- ground

Cyan- flight

When does emergency

pressurization come

on automatically?

a) ACM bleed leak

b) ACM o'temp

c) cabin 14,500 feet

Can emer press come

out of the wemac's?

Cabin underfloor only

In emer, most pneumatics

valves fail open.

Which two will fail close?

Baggage heat

Emer press

In order to work correctly,

what does auto

pressurization require?

a) Main DC

b) Service air

c) ADC

In order to work correctly,

what does cabin

dump switch require?

a) Main DC

b) Service air

(To vacuum outflow valves open)

What are the various things that happen with the cabin altitude

at 14,500 feet?

a) Pax masks will drop automatically

b) Max alt limit is reached on the outflow valves

c) Red cabin altitude is displayed on the CAS

d) Emergency descent mode

e) Emer press activates

What check-list can you think of

where you would have to use the

cabin ALT/SELECT switch?

Cracked windshield

What does the CABIN ALT lever

do during manual operation?

Controls the secondary outflow valves

True or false: when first powering up, if the pressurization controller amber FAULT light illuminates, a fault has occured

False, it's just doing a self-test

What happens to the outflow valves

when a T/O is aborted?

They open to depressurize the cabin

When is pressurization manual

mode activated?

Manually selected

Loss of DC

Amber fault indicator illuminated

Why does the airplane may pressurizes

on the ground in cold weather operation?

The vacuum air ejector in the service air system can collect moisture and freeze in cold temperatures.

This allows the aircraft to pressurize if the cabin is closed and warming, with the APU or an engine running. It can also occur on approach when engine power is reduced.

What can you do when the airplane pressurizes on the ground while in cold weather operation?

Open the foul weather window prior to switching APU Bleed Air ON or starting a main engine

What can you do when you have unwanted pressurization issues on approach while in cold weather operation?

Switch to Manual Pressurization and

control it using the Red CAB ALT lever (Cherry Picker)

to regain control of the system.

Keep in mind that the cabin must be depressurized manually before shutting the engines down or opening the cabin door

Why does an amber FAULT light illuminate on the pressurization control head when the rotary test switch knob is rotated to the OVER SPD position?

This is a normal sequence due to the Air Data Computers(ADCs)

reverting to test mode,

causing the pressurization controller

to believe the ADCs have developed a fault.