AIR MANAGEMENT SYSTEM CBT

Question 1

What is the ECS synoptic page?

Answer 1

Environmental Control System,

Showing the three bleed air sources.

Question 2

WHAT ARE THE POTENTIAL BLEED SOURCES?

Answer 2

ENGINE 1
ENGINE 2
APU

Question 3

WHERE IS THE COCKPIT AND CABIN TEMPERATURE DISPLAYED?

Answer 3

ON THE ECS SYSTEMS PAGE.

Question 4

WHEN WILL THE FLIGHT ATTENDANTS HAVE CONTROL OF THE CABIN TEMPERATURE?

Answer 4

WHEN PAX CABIN IS SET FULL LEFT TO “ATTND”

Question 5

WHAT IS THE OUTFLOW VALVE?

Answer 5

COTROLS AIRFLOW FROM THE CABIN THE OUTSIDE. CONTROLLING PRESSURIZATION.
(AUTO/MANUAL)

Question 6

WHAT ARE THE RAM AIR VALVES FOR?

Answer 6

• Provide emergency ventilation in the case of PACK shutdown, and Smoke Removal.
• Includes a check valve when Ram air pressure > Cabin pressure
• Commanded open if both PACKS off below 25,000’

Question 7

What is the Air Management System power?

Answer 7

ECS
Engine and wing anti-ice
Water pressurization
Engine Starter

Question 8

What a the PACK?

Answer 8

Pneumatic Air Conditioning Kit

Provides heating, air conditioning, and pressurization.

Question 9

How many PACKs are on board? How many do we need?

Answer 9

2 PACKs powered by on side engine or through a crossbleed valve (XBLD).
1 PACK can pressurize normally up to 31,000’

Question 10

What is the purpose of the pressurization Safety Valve?

Answer 10

Provide over pressurization protections.
Automatically opens if pisd exceeds 8.6
Also provides negative pressure relief if -.5 is exceeded
Spring loaded/mechanical

Question 11

What do the Engines supply the bleed air for?

Answer 11

• ECS
• Water pressurization
• Engine Start (no altitude restrictions)
• Engine and wing anti-ice

Question 12

What can the APU supply bleed air for?

Answer 12

• ECS up to 15,000’
• Water pressurization
• Engine start up to 21,000’
• Cannot supply anti-ice*

Question 13

Which cargo bay is the ECS maintain?

Answer 13

The forward cargo only.

Animals and Dry ice may only be stored in the forward compartment.

Question 14

What happens in the forward cargo bay in the event of a fire?

Answer 14

The compartment is isolated from the main compartment by a SOV and check valve.
And the forward cargo fan is commanded OFF.

Question 15

How do the push buttons on the Air Conditioning and Pneumatic control panel work?

Answer 15

AUTO-Pushed IN

OFF- Pushed OUT

Question 16

Recirculation Fans button indications?

Answer 16

OFF: Pushed out, white strip illuminated.
AUTO: Turns ON the RECIRC fan when at least 1 PACK is on. OFF when both PACKs are OFF or Cargo smoke is detected.

Question 17

What is required to use the “PAX CABIN” knob?

Answer 17

PACK 2

Question 18

What is required to use the “CKPT” knob?

Answer 18

PACK 1

Question 19

PACK 1/2 button indications?

Answer 19

OFF: Pushed out, white bar illuminated.
AUTO: Pushed in, OPENS PACK flow valve when bleed air is available. CLOSES PACK valve during ENGINE START and associated side BLEED system LEAK is detected.

Question 20

Crossbleed button indications?

Answer 20

OFF: Pushed out, illuminated.
AUTO: OPENS XBLEED valve when bleed air source available on one side only.
CLOSES XBLEED when bleed leak is detected or fire extinguishing handle has been pulled.

Question 21

External air connections

Answer 21

HP- for engine starting

LP-for cabin heating and cooling

Question 22

Where are external air connections indicated in the cockpit?

Answer 22

HP- Shown on ECS synoptic page

LP- Not shown in the cockpit

Question 23

Engine Bleed button indications?

Answer 23

OFF: Pushed out, white bar illuminated
AUTO: Pushed in, OPENS engine bleed when respective engine bleed is available.
CLOSES engine bleed when FIRE is detected or a duct leak/overpressure is detected.

Question 24

APU Bleed button indications?

Answer 24

OFF: Pushed out, white bar illuminated
AUTO: Pushed in, OPENS APU bleed valve when APU bleed is available.
CLOSES APU bleed valve when APU or LEFT bleed LEAK is detected, ANTI-ICE system is ON, or Left engine bleed is available.

Question 25

What is a limitation of APU bleed air?

Answer 25

It cannot supply air for ANTI-ICE.

Question 26

How can the pressurization be operated?

Answer 26

Controlled automatically or manually

Question 27

Cabin alt knob selections?

Answer 27

DOWN: Held in this position , the cabin altitude will decreases (increases cabin pressure)
STOP: OFV movement will stop, Spring loaded to STOP
UP: OFV moved toward OPEN and CABIN altitude increases (decrease in cabin pressure)

Question 28

Pressurization Mode Knob selections

Answer 28

AUTO: AUTOMATICALLY control pressurization throughout entire flight, LANDING altitude automatically set by flight plan
LFE CTRL: AUTOMATICALLY control pressurization throughout entire flight, LANDING altitude automatically set MANUALLY
MAN: MANUALLY control OFV with the CBAIN ALT knob

Question 29

When would we use the LFE CTRL on the Pressurization mode knob?

Answer 29

When we are landing at a destination that is not in the database.

Question 30

What happens when the DUMP button is pressed?

Answer 30

• Provides rapid depressurization by OPENING the OFV to command a 2000 FPM to 12,400’ cabin altitude (OFV closes)
• Commands the PACKs OFF
• Commands the recirculation fans OFF

Question 31

Does the DUMP button work in manual pressurization?

Answer 31

No, must be done by the pilot.

Question 32

When would we use the DUMP button?

Answer 32

During the Smoke Evacuation

Question 33

Mask Deploy Knob indications

Answer 33

OFF: Disables automatic deployment
AUTO: Automatically deploys pax O2 masks when cabin altitude reaches 14,000 to 14,750’
ON: Deploys pax O2 masks

Question 34

How is pax O2 provided? How long will it last?

Answer 34

Supplied by an O2 generator, will last about 12 minutes.

Question 35

What do the following pressurization EICAS information indicate, ALT, RATE, ΔP, and LFE?

Answer 35

ALT- Cabin altitude
RATE- Rate of change of cabin altitude
ΔP- Differential pressure
LFE- Landing field elevation

Question 36

What is the maximum ΔP?

Answer 36

7. 8 psi FL370 and below

8. 4 psi above FL370