abnormal
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Joined: Tue Aug 21, 2007 12:14 pm

Batteries during an EMER EVAC - ON or OFF

Thu Dec 07, 2017 10:51 pm

On our A320s and A330s there is no requirement to turn the Batteries OFF once the EVACUATE PA has been made.

Isn't that odd? Wouldn't you want all electrical power off in the event of an Emergency Evacuation to reduce the risk of fire?
 
battlegroup62
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Joined: Mon Jul 03, 2017 5:05 am

Re: Batteries during an EMER EVAC - ON or OFF

Thu Dec 07, 2017 11:41 pm

Is there more to the checklist? On ones I have seen you call for evacuation then there is another list for aircraft shutdown prior to cockpit evacuation. Also its possible that if you are calling for an evac there are bigger issues to deal with than if the batteries could start a fire. say, the plane is already on fire.
We have to keep planes airworthy. That doesn't mean they have to fly.
 
Flow2706
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Joined: Sat Jan 28, 2017 7:20 pm

Re: Batteries during an EMER EVAC - ON or OFF

Fri Dec 08, 2017 12:12 am

IIRC, there used to be a point "If time permits, before leaving the aircraft: Batteries Off" on the A320 EVAC Checklist, but it was removed some years ago...I am not sure why the changed it, but I guess that the batteries are not that dangerous. Without any power the Dome light will not function either, making it hard to get out of a dark and/or smoke filled cockpit (if Engines and APU are off and only batteries are supplying the aircraft the right column of the Dome light will still function to enable the FO to read the evacuation checklist - and as I recently learned thanks to this forum the left column can be powered by external power even with the batteries off, for maintenance. However without *any* power you will not have the dome light as it is not on a hot bus.)
 
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zeke
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Re: Batteries during an EMER EVAC - ON or OFF

Fri Dec 08, 2017 2:10 am

abnormal wrote:
On our A320s and A330s there is no requirement to turn the Batteries OFF once the EVACUATE PA has been made.

Isn't that odd? Wouldn't you want all electrical power off in the event of an Emergency Evacuation to reduce the risk of fire?


EVAC is about getting Pax and Crew off to keep them safe. The checklist is built about getting the outside of the aircraft safe so they will not have engines running etc.

Leaving the batteries on will ensure there is enough lighting etc to get everyone off. What happens to the aircraft if everyone is safe is of little concern.
Human rights lawyers are "ambulance chasers of the very worst kind.'" - Sky News
 
LimaFoxTango
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Re: Batteries during an EMER EVAC - ON or OFF

Fri Dec 08, 2017 4:11 am

Wouldn't the CVR still run and possibly erase critical stuff? I know in some aircraft the CVR runs from battery on to battery off.
You are said to be a good pilot when your take-off's equal your landings.
 
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zeke
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Re: Batteries during an EMER EVAC - ON or OFF

Fri Dec 08, 2017 5:26 am

You are describing some 737s, other 737s will turn themselves off automatically.

All the Airbus FBW aircraft automatically turn off the CVR 5 minutes after the engines are shutdown.
Human rights lawyers are "ambulance chasers of the very worst kind.'" - Sky News
 
abnormal
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Re: Batteries during an EMER EVAC - ON or OFF

Fri Dec 08, 2017 2:02 pm

Thank you for the feedback people - I suppose if one is able to do the checklist then the you and the plane are intact so the risk of a fire due to the batteries is reduced. There is something else of a bigger concern going on and power for lighting and communication is outweighs the risks of a battery fire?

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