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Airbus Clock - Lie or Truth?

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Airbus Clock - Lie or Truth?

Old 20th Aug 2010, 23:20
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Airbus Clock - Lie or Truth?

"The validity of the WTB test is based on the calendar built into the a/c clock so adjusting the clock by more than 9 days will render the test log invalid - causing the slats and flaps to lock. Ordinarily the a/c clock runs with real-time updates off the GPS master clock and shouldn't be changed."

So if you were to adjust the clock by more than 9 days -- say 10 days -- you're going to have to make a slatless/flapless landing?

Any of you Airbus drivers out there know if this is the truth or just absolute rubbish?
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Old 21st Aug 2010, 03:14
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So if you were to adjust the clock by more than 9 days -- say 10 days -- you're going to have to make a slatless/flapless landing?
Answer - NO

But you will taxi in with a WTB Ecam message and details in the PFR.

A CMS reset of the WTB will need to be done before the next flight.
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Old 21st Aug 2010, 08:23
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I think the answer is yes.

After a clock reset I had a few years ago, they also had to do a WTB check to release aircraft.
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Old 21st Aug 2010, 08:59
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With our MMR receivers on our 320's, these have been playing havoc with the GPS feed to the clock, resetting the date to sometime in the 1990's.

No WTB locks to date...
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Old 21st Aug 2010, 09:01
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http://www.pprune.org/tech-log/419763-a320-wtbs.html


Same Question.
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Old 21st Aug 2010, 09:04
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After a clock reset I had a few years ago, they also had to do a WTB check to release aircraft.
A CMS reset of the WTB will need to be done before the next flight.
The "SLAT (FLAP) WING TIP BRAKE FAULT " message is inhibitted during flight phases 3,4,5,6,7,8 so how would the all knowing pilot know they had a fault
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Old 21st Aug 2010, 11:06
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They would get an ECAM message during phase 1,2,9 or 10.....
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Old 22nd Aug 2010, 04:11
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Afraid it's a misunderstanding that has been around for quite some time. Probably stirred up by those Boeing techies back over in Seattle.
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Old 23rd Aug 2010, 04:09
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I think there is some truth to it, I remember years ago one of our A320's clock was U/S and we had a WTB problem.
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Old 23rd Aug 2010, 05:25
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Yes true.

It's happened to one of our A340's a few years ago. They had to do a Flapless LDG because the S/O stuffed up adjusting the clock.

Memo to Crew:---- Adjusting the clock is a MAINTENANCE FUNCTION on the ground....
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Old 23rd Aug 2010, 06:00
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Happened to a CX A/C on the ground after adjusting the clock, crew were unable to set the flaps for T/O. I'm fairly sure after the investigation it was confirmed in could not happen in flight, it may get triggered during flight but would only be an issue after landing.
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Old 24th Aug 2010, 19:27
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happened at Sabena on a brnad new A321 (and just converted crew) coming from Malaga... So it is true.
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Old 24th Aug 2010, 19:32
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Happened in my past airline before when a fast as lightning F/O decided to reset the clock on the pushback. Well, WTB did it's job and they had to pull back into the bay and get the engineer to run the procedure in the CMS. Don't play with the clock!!!
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Old 26th Aug 2010, 18:53
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Yes true, but ten days for 330 and does not effect 320/19 from what I can see in the books.
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