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What does this do? It's located next to the overhead panel of an A320 cockpit.

enter image description here

unknown lever

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    $\begingroup$ @Bianfable it appears to be to the bottom-right hand side of the overhead panel. Next to the ventilation controls. $\endgroup$
    – Chris
    Jun 2, 2022 at 14:17
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    $\begingroup$ I’d guess it is the ventilation control. Probably opens and closes the louvers for that overhead vent. Interesting that the pilot doesn’t seem to have one too. $\endgroup$
    – Jim
    Jun 3, 2022 at 4:39
  • $\begingroup$ Prob due to the HUD $\endgroup$
    – Steve
    Jun 3, 2022 at 5:57
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    $\begingroup$ Why not give it a yank and see what happens? $\endgroup$ Jun 4, 2022 at 20:11

1 Answer 1

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It's a secret and Airbus does not want you to know.)

Here is the cockpit general arrangement view from the Airbus Flightdeck and Systems briefing for Pilots which labels the visor and rope storage compartment, but the pdf in every version that I looked at only showed descriptions for controls but the graphic did not render. Anywhere.

enter image description here

Next I looked at a flight crew operating manual, where the control is not even pictured but everything around it is. This may be only useful in determining what it is not.

enter image description here

I looked at photos including this one from a German Wings A320 where there are two, so it cannot be that critical a control if this has two, your photo has one, some apparently have none, and nowhere is it documented.

enter image description here

The best answer that I found comes from the cabin crew operators manual which shows ventilation ducts going right through that area on both sides of the overhead panel, terminating in a plenum above each of the pilot and copilot windscreens and showing airflow from those plenums across the windscreens. Since the control is a variable +/- from your picture, it stands to reason that it is a simple airflow control for defogging the windscreen.

enter image description here

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  • $\begingroup$ +1 for opening sentence -- $\endgroup$ Jun 4, 2022 at 20:19

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