A318/19/20/21 Apu Shutdown

[granard]

What is the correct way of avoiding the APU flap door staying open while shutting down power from the aircraft?

[Fargoo]

Leave the batteries on until you can visually check it's closed. Or wait 2 minutes after the APU has shutdown.

[subsonic69]

yup

yup... 2 minutes is good enough time for it to fully close...

[Tinwacker]

Granard,
I left an A330 suggestion in your Tech Log Forum....
still delaying batteries OFF.
Much the same as previous postings.

[spannerhead]

2 minutes seems a bit long but yep........the flap is sure to be closed by then.

[tested satis]

On The Apu Ecam Page The Door Indication Will Disappear When The Door Is Closed.then It Is Ok The Downpower The Aircraft.

[Fargoo]

I guess the original question was concerning shutting down the APU when it's your only source of power, hence no ECAM.

Approx 2 mins is what's quoted in the AMM but a quick run downstairs for a look tends to show it's normally quicker than that. Depends which door actuator you have fitted as the old type takes a lot longer than the new version.