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 pushbuttons in AUTO how does the system operate?

Answer 2

a. Ground – system is normally in the OPEN configuration
b. Flight – system is normally in the CLOSED configuration
c. Intermediate – Closed configuration except small internal flap in Extract Valve is open

Question 3

With both BLOWER and EXTRACT pushbuttons in OVRD (smoke configuration) what are the positions of the
INLET and EXTRACT valves?

Answer 3

a. INLET valve CLOSED

b. EXTRACT valve OPEN

Question 4

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

Answer 4

a. BLOWER fan OFF

b. EXTRACT fan ON

Question 5

When is air conditioning introduced into the avionics compartment?

Answer 5

a. Abnormal operation

b. SMOKE configuration

Question 6

b. SMOKE configuration

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

a. SMOKE warning is activated
b. Computer power supply failure
c. Low blower pressure
d. Duct overheat

Question 8

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

Answer 8

a. SMOKE Warning is activated
b. Computer power supply failure
c. 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