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Do you turn FD's Off after landing?

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Do you turn FD's Off after landing?

Old 20th Feb 2018, 17:03
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Do you turn FD's Off after landing?

A question for airbus pilots,

Do you turn off fd's after landing ? if yes, why ?

thanks, safe flying!!
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Old 20th Feb 2018, 17:45
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No, never, ever.
No reason to do that.
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Old 20th Feb 2018, 17:49
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Originally Posted by Aiza View Post
A question for airbus pilots,

Do you turn off fd's after landing ? if yes, why ?

thanks, safe flying!!
Yes. To save some power consumed by FD P/Bs
Seriously, there is no valid reason. Just to reset the thing and let the next crew to start from square one.
What really perplexes me, is when the previous crew sets all volume controls to minimum, and I have to rotate 16 knobs to the MID position. This is one of the most time consuming parts of cockpit prep.

Last edited by Romasik; 20th Feb 2018 at 19:15. Reason: correction
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Old 20th Feb 2018, 18:10
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Originally Posted by safelife View Post
No, never, ever.
No reason to do that.
In Boeing aircraft you do....part of the after landing check list.
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Old 20th Feb 2018, 18:19
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I've worked for two major european Airbus users and one doesn't and one does....

Why do Boeing do it? Is it to allow the Master/Slave logic to be reset for the next sector (737NG)?
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Old 20th Feb 2018, 21:21
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If we’re talking A380 the automatic PRIM reset x mins after shutdown switches it off anyway.
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Old 20th Feb 2018, 21:49
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On t7 yes, flew md11 for many many years, never. Must be a boeing thing.
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Old 20th Feb 2018, 22:30
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Yes! The reason? Monkey see monkey doo! ;-)
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Old 20th Feb 2018, 22:57
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We used to until some years ago, now we don’t at our airbus fleet
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Old 21st Feb 2018, 04:09
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Originally Posted by Fat Busdriver View Post
Yes! The reason? Monkey see monkey doo! ;-)
You tell me buddy....

https://flyuk.aero/assets/downloads/resources/checklists/UKV-PRD-B737-CHECKLIST-V2.pdf

http://www.kennair.com.au/wp-content/uploads/2015/04/B777-200-CHECKLIST.pdf
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Old 21st Feb 2018, 04:26
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Originally Posted by B2N2 View Post
You tell me buddy....

https://flyuk.aero/assets/downloads/resources/checklists/UKV-PRD-B737-CHECKLIST-V2.pdf

http://www.kennair.com.au/wp-content/uploads/2015/04/B777-200-CHECKLIST.pdf

That's great for Boeing's but,

Originally Posted by Aiza View Post
A question for airbus pilots,
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Old 21st Feb 2018, 08:48
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Originally Posted by B2N2 View Post
In Boeing aircraft you do....part of the after landing check list.
Perhaps you want to look into that checklist. Turning the F/D's off (Boeing 777/787, 744) prior to selecting the fuel cutoff switches to off cancels the next sector's F/D initialization self-test.
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Old 21st Feb 2018, 09:03
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Originally Posted by EK380 View Post
If we’re talking A380 the automatic PRIM reset x mins after shutdown switches it off anyway.
What about the A320 series?
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Old 21st Feb 2018, 09:22
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Originally Posted by Bonway View Post
Perhaps you want to look into that checklist. Turning the F/D's off (Boeing 777/787, 744) prior to selecting the fuel cutoff switches to off cancels the next sector's F/D initialization self-test.

I rarely log in and say anything; but this sort of info is brilliant! Never knew that.

(what else don't I know...)
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Old 21st Feb 2018, 10:46
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To elaborate (Boeing): After landing two sets of self-tests are run. The first set occurs once the flaps and speed brakes are retracted and the groundspeed is below 30kts. This set of tests requires 90 seconds to complete and that the hydraulics not be interrupted. If the engines are shut down before the flaps are retracted these tests will not be done. The second set of tests occur once the first set is complete and the hydraulics are depressurized (after shut down). These tests take approx. 70 seconds to complete. The F/D self-test takes place in the first set of tests and therefore is not done if the F/D's are switched off after landing.
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Old 21st Feb 2018, 18:11
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Originally Posted by Bonway View Post
Perhaps you want to look into that checklist. Turning the F/D's off (Boeing 777/787, 744) prior to selecting the fuel cutoff switches to off cancels the next sector's F/D initialization self-test.
And where can you find this kind of information?

Just curious, that's all.

In my company, it is a part of the shutdown flow, so after fuel cutoff. I do see guys doing it while taxiing in and never thought it made a difference. I just prefer to follow SOP myself and I guess it is another good example of doing just that even though we don't always know the reason behind it.
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Old 21st Feb 2018, 18:16
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Originally Posted by Bonway View Post
To elaborate (Boeing): After landing two sets of self-tests are run. The first set occurs once the flaps and speed brakes are retracted and the groundspeed is below 30kts. This set of tests requires 90 seconds to complete and that the hydraulics not be interrupted. If the engines are shut down before the flaps are retracted these tests will not be done. The second set of tests occur once the first set is complete and the hydraulics are depressurized (after shut down). These tests take approx. 70 seconds to complete. The F/D self-test takes place in the first set of tests and therefore is not done if the F/D's are switched off after landing.

So what happens if you do a visual approach with FD off? No self test after landing?
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Old 21st Feb 2018, 18:28
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Originally Posted by Bonway View Post
If the engines are shut down before the flaps are retracted these tests will not be done.
In more detail, what happens in situations with contaminated runway/taxiwa/apron where Boeing recommends not to retract the flaps after landing to allow for maintenance to check if no contaminants are present? (flap retraction might cause flap damage)
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Old 21st Feb 2018, 20:56
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ibmpilot

The info is from the various FCOMs, AFMs, and AMMs. The FCOM and AFM list the test sequence details and the AMM the exact items tested under each sequence. I researched this info as a result of my company doing exactly that. We would switch the F/D's off with the after landing flow. In doing that I recalled reading somewhere of a Cathay Pacific B744 having F/D issues after takeoff and their engineering department tracing the problem back to this reason.

viking767

That is correct. Bear in mind that not all of the tests are required after (before) every flight. I cannot recall how often the F/D check is required.

BraceBrace

In that case, the 90-second taxi in tests will not be done, but the 70-second test after hydraulics off may still be done.

The FCOM goes on to say that if either of these tests is interrupted, or, if the hydraulic power-on tests are accomplished without the hydraulic power-off tests being accomplished on two consecutive flights, fault conditions may be generated.
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Old 22nd Feb 2018, 01:13
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Whatever is the reason , if is was so important to keep the F/D on after landing it should have been clearly written.
I am flying Boeing for more than 25 years now and never had any problem with my F/D even when switching it off after landing or doing a raw data approach without it...
I must have been very Lucky then and by the way never seen anything about this in any of the Boeing manuals available to the pilots at least...
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