Equipment Cooling Panel

Question 1

What are the two switches on the equipment cooling panel?

Answer 1

Supply and exhaust

Question 2

What are the switch positions ?

Answer 2

NORM and ALTN

Question 3

What does it mean when the supply/exhaust switch is in both Norm and ALTN position?

Answer 3

NORM:
- Normal cooling supply fan activated
- Normal cooling exhaust fan activated

ALTN:
- ALTN cooling supply fan activated
- ALTN cooling exhaust fan activated

Question 4

What does the equip cooling supply/exhaust OFF light illuminated mean?

Answer 4

When illuminated Amber, no airflow from selected cooling supply fan or exhaust fan.

Question 5

What does the equipment cooling system do?

Answer 5

It cools the electronic equipment in the flight deck and the E&E bay.

Question 6

To which part of the aircraft does the supply duct supply cool air?

Answer 6

Flight deck displays
Electronic equipment in the E&E bay

Question 7

What is the purpose of the exhaust duct?

Answer 7

It collects and discards warm air from:
- the flight deck displays
- overhead and aft electronic panels
- circuit breaker panels in the flight deck
- electronic equipment in the E&E bay

Question 8

When will the equipment cooling exhaust fan be shut off and the equipment cooling exhaust fan light OFF be inhibited?

Answer 8

In the event of a forward cargo fire warning

Question 9

What happens if an over temperature occurs on the ground ?

Answer 9

Alerting is provided through the crew call horn in the nose wheel well