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Why the ding after take-off

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Why the ding after take-off

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Old 14th Jan 2007, 20:51
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Why the ding after take-off

I did a search so apologies if asked...

I notice on the A319/20/21 and so on, ding immediatly after take-off.
I'm sure it's when the landing gear is being retracted/extended.

Just wondered why the ding.

Cheers

Stu...

http://flightlevel350.com/Aircraft_A...-4633.html?s=y

Just found this video. You can hear the noisey landing gear retract straight after the ding.

Last edited by tangoecho; 14th Jan 2007 at 22:06. Reason: To add short video
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Old 14th Jan 2007, 21:16
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I don't fly Airbus but I guess that it is the flight deck crew signalling to the cabin crew that they can unstrap and begin their duties. It's a standard procedure which doesn't involve having to actually talk to the No. 1 which could be very time-consuming and inconvenient whilst flying the departure.
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Old 14th Jan 2007, 21:26
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It is the no smoking signs going off automatically when the gear is retracted.

Now it may be that the no-smoking signs stay on anyway (as programmed into the CIDS) but there is still the ding as the gear goes up.
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Old 14th Jan 2007, 21:31
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As cc on the A319 I can confirm the ding is connected to the retraction/extention of the gear. It happens at the same time as the exit sign stops/starts being illuminated. On descend it happens this way: landing gear goes down, about two seconds later 'ding' and exit signs illuminate. For cc it means now starts/stops the time of 'landing position'. And if the cabin is not secure yet, bloody hurry up! ;-)

For us to be released from our seats is a different 'ding' controlled by the flight deck, done with the seat belt sign and it only happens at the beginning of the flight not at the end.
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Old 14th Jan 2007, 21:34
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Originally Posted by fmgc
It is the no smoking signs going off automatically when the gear is retracted.

Now it may be that the no-smoking signs stay on anyway (as programmed into the CIDS) but there is still the ding as the gear goes up.
I can't imagine that pax would have been allowed to smoke that soon after take-off???
And that long into descend? Especially as we would have given our cabin secure minutes before the 'ding' if everything goes to plan...
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Old 14th Jan 2007, 21:42
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Dolley is correct on this one!
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Old 14th Jan 2007, 21:43
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Perhaps,

But I speak the truth.
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Old 14th Jan 2007, 21:52
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FCOM Vol 1

Section 1.33.40 P1

(This section refers to the NO SMOKING sel switch in the AUTO position)

I quote:

NO SMOKING & EXIT signs come on when landing gear is extended and go off when landing gear is retracted. Low chime sounds (depends on the CIDS/CAM programming) when the lights go on or off.
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Old 14th Jan 2007, 21:55
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fmgc:

It's not that I don't believe you I'm just very surprised indeed.
Bloody senseless if you ask me.
But...as there is no smoking anyway, who cares?! :-)
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Old 14th Jan 2007, 22:06
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Boeing is built the same way - in 'AUTO', lap straps come on with flaps, and smokers with gear. It gave the Captain time to empty the old baccy from his pipe on finals.
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Old 14th Jan 2007, 22:42
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it's clearly explained in this video - at around the 1min 20 mark.

http://www.youtube.com/watch?v=arCITMfxvEc
 
Old 15th Jan 2007, 08:10
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See, you can learn something new every day!

The day wasn't wasted after all :-)
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