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 push buttons in AUTO how does the system operate?

Answer 2

Ground - system is normally in the OPEN configuration
Flight - system is normally in the CLOSED configuration
Intermediate - Closed configuration except small internal flap in Extract valve is open

Question 3

With both BLOWER and EXTRACT push buttons on OVRD (smoke configuration) what are the positions of the INLET and EXTRACT valves?

Answer 3

INLET valve CLOSED
EXTRACT valve INTERMEDIATE

Question 4

What is the status of the Blower and Extract fans with the Blower and Extract valves in OVRD?

Answer 4

BLOWER fan OFF
EXTRACT fan ON

Question 5

When is air conditioning introduced into the avionics compartment?

Answer 5

Abnormal operation
SMOKE configuration

Question 6

Is the skin heat exchanger ever bypassed in flight?

Answer 6

Yes, during SMOKE configuration

Question 7

What does an amber FAULT light on the BLOWER pushbutton indicate?

Answer 7

1. SMOKE warning is activating
2. Computer power supply failure
3. Low blower pressure
4. Duct overheat

Question 8

What does an amber FAULT light on the EXTRACT pushbutton indicate?

Answer 8

1. Smoke warning is activated
2. Computer power supply failure
3. Low extract pressure

Question 9

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

Answer 9

Yes - The SMOKE light in the GEN 1 LINE pushbutton