EQUIP COOLING PANEL Flashcards

1
Q

EQUIP COOLING Switch

  • 2 switches / 2 positions -
A
  • 2 fan sets: supply and exhaust

For BOTH SUPPLY and EXHAUST:

  • NORM:
    • ​normal cooling supply / exhaust fan activated
  • ALTN:
    • ​alternate coolin supply / exhaust fan activated
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2
Q

OFF Light - Equip Cooling

What does the amber ‘off’ light indicate? (1sp)

A

[1sp - not enough airflow in the avionics compartment]

Illuminated (Amber):

  • NO AIRFLOW from selected cooling supply / exhaust fan
  • low airflow in fan duct due to fan failure
  • sensor or filter is dirty
  • OEV fails (EXHAUST OFF light ONLY)

* if SUPPLY [OFF] illuminates in flight w/in 30 min you could lose the Capts and Lower DU’s

* if EXHAUST [OFF] illuminates in flight w/in 30 min you could lose the FO’s and upper DU’s

  • if there is an over temp on the ground it triggers an crew call horn in the nose wheel well
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