2-VENTILATION

Question 1

What are some potential causes for the illumination of the BLOWER FAULT pb light?

Answer 1

• Low blower pressure
• Duct overheat
• Computer power supply failure
• Smoke warning activated

Question 2

When would a pilot select the EXTRACT to OVRD?

Answer 2

• Heavy Rain on the ground
• When directed to by the ECAM

Question 3

What are some potential causes for the illumination of the EXTRACT FAULT light?

Answer 3

• Low extract pressure
• Computer power supply failure
• Smoke warning activated

Question 4

What condition in the avionics ventilation system would cause an external horn to sound?

Answer 4

• BLOWER FAULT or EXTRACT FAULT on the ground with both engines stopped.

Question 5

Describe the avionics ventilation system.

Answer 5

• It is a fully automated system that considers the skin temperature and
  adjusts inlet and outlet flaps to optimize cooling and airflow.
• During normal operations, the AIR COND INLET VALVE remains closed
• During abnormal operations, the AIR COND INLET VALVE always opens providing fresh ventilation air.

Question 6

Describe the OPEN CIRCUIT CONFIGURATION for avionics ventilation

Answer 6

Both the inlet and the outlet flaps are fully open (aircraft is on ground and the skin temperature is above a set threshold)

Question 7

Describe the CLOSED CIRCUIT CONFIGURATION for avionics ventilation

Answer 7

Both the inlet and outlet flaps are fully closed. The SKIN EXCHANGE INLET BYPASS VALVE and SKIN EXCHANGE ISOLATION VALVE is open, allowing air to the cargo under floor, eventually exiting via the outflow valve (aircraft is on the ground or in-flight and the skin temperature below a set threshold)

Question 8

Describe the INTERMEDIATE CIRCUIT CONFIGURATION for avionics ventilation

Answer 8

The inlet flap is fully closed, the outlet small flap is open (aircraft is in-flight and the skin temperature is above a set threshold).

Question 9

Describe the avionics ventilation configuration with BLOWER or EXTRACT FAULT.

Answer 9

Both inlet and outlet flaps are fully closed,
and SKIN EXCHANGE INLET BYPASS VALVE is closed.

Question 10

Describe the avionics ventilation configuration during SMOKE.

Answer 10

Once the BLOWER and EXTRACT pushbuttons have been selected to OVRD,
the blower fan will stop,
the extract fan will continue to run,
the inlet flap closes,
the small outlet flap opens,
the SKIN EXCHG ISOLATION VALVE closes,
the SKIN EXCHG INLET BYPASS VALVE closes.