Cargo Heat / Ventilation Panels - Rev 04

Question 1

What does the CARGO HEAT HOT AIR amber FAULT light indicate?

(FCOM-DSC-21-40-30)

Answer 1

Duct overheat

Question 2

What is the purpose of the CABIN FANS?

(FCOM-DSC-21-10-20)

Answer 2

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

Question 3

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

(FCOM-DSC-21-30-20, FCOM-DSC-21-30-60)

Answer 3

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 4

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

(FCOM-DSC-21-30-20)

Answer 4

INLET valve CLOSED

EXTRACT valve OPEN

Question 5

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

(FCOM-DSC-21-30-20)

Answer 5

a. BLOWER fan OFF

b. EXTRACT fan ON

Question 6

When is air conditioning introduced into the Avionics Compartment?

(FCOM-DSC-21-30-20)

Answer 6

a. Abnormal operation

b. SMOKE configuration

Question 7

Is the skin heat exchanger ever bypassed in flight?

(FCOM-DSC-21-30-20)

Answer 7

Yes during SMOKE configuration

Question 8

What does an amber FAULT light on the BLOWER push button indicate?

(FCOM-DSC-21-30-60)

Answer 8

a. SMOKE warning is activated

b. Computer power supply failure

c. Low Blower pressure

d. Duct overheat

Question 9

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

(FCOM-DSC-21-30-60)

Answer 9

a. SMOKE Warning is activated

b. Computer power supply failure

c. Low Extract pressure

Question 10

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

(FCOM-DSC-26-30-20)

Answer 10

Yes - The SMOKE light in the GEN 1 LINE push button