PNEUMATIC SYSTEM

Question 1

WHAT IS THE PNEUMATIC SYSTEM USED FOR?

Answer 1

• AIR CONDITIONING
• ENG STARTING
• ANTI ICE
• WATER PRESSSURIZATION
• HYDRAULIC RESEVOIR PRESSURIZATION
• FUEL TANK INERTING SYSTEM (FTIS)

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Question 2

WHAT ARE THE 3 HP AIR SOURCES?

Answer 2

• ENG BLEEDS
• APU
• HP GND CONNECTOR

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Question 3

WHAT CONTROLS THE PNEUMATIC SYSTEM?

Answer 3

2 BMC’S (Bleed Monitoring Computers)
Overhead Control Panel
ECAM controls and monitors.

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Question 4

WHERE IS AIR NORMALLY BLED FROM?

Answer 4

Intermediate Pressure (IP) Stage of the engines High-Pressure compressor.

At low ENG speeds the air pressure is tapped from the High-Pressure stage.

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Question 5

WHEN DOES THE HP VALVE CLOSE AUTOMATICALLY?

Answer 5

• LOW upstream pressure
• EXCESSIVE upstream pressure

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Question 6

THE BLEED VALVE MAINTAINS WHAT DELIVERY PRESSURE?

Answer 6

45 PSI (+/- 5PSI)

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Question 7

WHEN DOES THE BLEED VALVE CLOSE?

Answer 7

PNEUMATICALLY

• Upstream pressure below 8psi
• there is return flow

ELECTRICALLY

• BLEED PB
• ENG FIRE PB
• BMC detects an issue

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Question 8

WHERE DO LEAK DETECTIONS MONITOR?

Answer 8

• HOT AIR DUCTS
• PYLONS
• WINGS

Question 9

WHAT HAPPENS WHEN A WING LEAK IS DETECTED?

Answer 9

• BLEED VALVE CLOSE AUTOMATICALLY
• FAULT LIGHT ON AIR COND panel
• X-BLEED CLOSE automatically
• APU valve close

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Question 10

WHAT HAPPENS WHEN A PYLON LEAK IS SIGNALLED?

Answer 10

• BLEED VALVE CLOSE
• FAULT LIGHT on AIR COND panel
• X-BLEED CLOSE automatically

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