PPRuNe Forums - View Single Post - A320 Cockpit air noise change on climb and descent
Old 3rd Dec 2010, 13:59
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IFixPlanes
 
Join Date: Apr 2004
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@ ggofpac
Drain valve not drain mast.
These drain valves release the condensed moisture outboard when you are on ground.
You can recognize them on the hexagon shaped hole with a diameter at about 5mm.


@ VRSCSE2
Your FCOM might be OK, but you have to learn to read and interpret them.
Without reaching the "IN FLIGHT THRESHOLD" your skin air extract valve wont go in the "partial open" position.
The skin air inlet valve never open in flight.
(FCOM 1.21.30 P5)

Maybe a table out of the AMM can change your mind:
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