Pneumatics

Question 1

Q1 | AIR CONDITIONING PANEL

The pneumatic system is monitored and controlled by?

[ FCOM-DSC-36-10-10 ]

Answer 1

2 Bleed Monitoring Computers (BMC)

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Question 2

Q2 | AIR CONDITIONING PANEL

If one BMC fails, can the other take over?

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Answer 2

Yes, they are interconnected.

If BMC 1 fails:
* APU and ENG 1 leak detection are not monitored
* ECAM APU BLEED LEAK warning is lost

[ FCOM-DSC-36-10-20 ]

Question 3

Q3 | AIR CONDITIONING PANEL

What does the amber FAULT light in the APU BLEED pushbutton indicate?

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Answer 3

Bleed leak (APU bleed valve closes)

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Question 4

Q4 | AIR CONDITIONING PANEL

What causes the amber FAULT light on the ENG 1 BLEED and/or ENG 2 BLEED pushbutton?

DOOL-E

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Answer 4

• Overpressure - Downstream of the bleed valve
• Overheat
• Leak - Low pressure
• Discontinuity - APU bleed valve open and engine bleed valve not closed or
• Engine Start with bleed valve not closed

[ FCOM-DSC-36-20 ]

Question 5

Q5 | AIR CONDITIONING PANEL

What are the two functions of the engine bleed valves?

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Answer 5

• Pressure regulation
• Shut off valves

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Question 6

Q6 | AIR CONDITIONING PANEL

What logic controls the X-Bleed valve when the X-BLEED switch is in AUTO?

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Answer 6

• When APU bleed valve is OPEN, the X-Bleed valve is open
• When APU bleed valve is CLOSED, the X-Bleed valve is closed
• X-Bleed also CLOSES for wing, pylon, or APU duct leak (except during engine start)

[ FCOM-DSC-36-10-40 ]

Question 7

Q7 | AIR CONDITIONING PANEL

After engine start with the APU BLEED pushbutton ON, what source is supplying bleed air to the packs?

[ FCOM-DSC-36-10-20 ]

Answer 7

APU Bleed

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