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Thread: A318/19/20/21 Aircraft electrical power down.
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Old 25th Sep 2009, 09:45
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hetfield
 
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Ehrrm, not current anymore, but AFAIK Apu Flap is controlled via the ECB which is powered by the BAT BUS. The BAT BUS is supplied by DC BUS 1and/or 2 and/or the batteries.

So if EXT ELEC ON, the BAT BUS is supplied even with batteries of and the Flap will close.

My 2 cents.
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