VENTILATION Panel

Question 1

What is the purpose of the CABIN FANS?

Answer 1

To re-circulate cabin air to the mixing chamber and then back to the cabin

Question 2

With BLOWER and EXTRACT pbs in AUTO how does the system operate?

Answer 2

• Ground – system is in OPEN configuration
• Flight – system is in CLOSED configuration
• Intermediate – Closed except Extract Valve is partially open

Question 3

With both BLOWER and EXTRACT pbs in OVRD, what are the positions of the INLET and EXTRACT valves?

Answer 3

• INLET valve CLOSED

* EXTRACT valve partially OPEN

Question 4

What fan is OFF in the above situation?

Answer 4

• BLOWER fan OFF

* EXTRACT fan ON

Question 5

Is Air Conditioning ever introduced into the Avionics Compartment?

Answer 5

Yes – In the SMOKE configuration or Abnormal configuration

Question 6

What happens with only the EXTRACT pb in OVRD?

Answer 6

• BLOWER fan ON
• EXTRACT fan ON
• AIR COND INLET valve OPEN
• INLET valve CLOSED
• EXTRACT valve CLOSED

Question 7

Is the skin heat exchanger ever bypassed in flight?

Answer 7

Yes – during SMOKE configuration

Question 8

What does a FAULT light on the BLOWER pb indicate?

Answer 8

• SMOKE Warning is activated
• Computer power supply failure
• Low Blower pressure
• Duct overheat

Question 9

What does a FAULT light on the EXTRACT pb indicate?

Answer 9

• SMOKE Warning is activated
• Computer power supply failure
• Low Extract pressure

Question 10

With 2 FAULT lights on the VENTILATION panel are there any other indications?

Answer 10

Yes – The SMOKE light in the GEN 1 LINE pb