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Voyager Plummets (Merged)

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Voyager Plummets (Merged)

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Old 19th Mar 2014, 21:54
  #281 (permalink)  
 
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Justanopinion, quite so! I can't imagine many people in such a sudden and unexpected situation in the dark of night thinking "You know, I wonder if something might actually be snagging the base of the sidestick" whilst the aircraft is bunting into an unexpected descent.

I imagine there'll be simple mitigations put in place now - such as checking that there's nothing in front of the arm rest when motoring the seat and a ban on anything being placed on the side console. Not necessarily a camera / iToy etc - anything could get caught, such as a flight document.

Time out for a war story - the Luftwaffe exchange officer on my F-4 squadron very nearly ran out of fuel way out over the North Sea once. All because he'd stuffed his flying jacket into the cockpit and nudged the fuel selector to the wrong position. Plenty of fuel, but the engines weren't getting it. Master Caution and FUEL caption, but he at least spotted the selector once he'd shifted his jacket off the panel and recovered the situation - although his frantic turn towards home and call of "Fuuuuuuuuuuelll priority" had us wondering!

I think it was Duncan Simpson who had a control restriction in the early days of testing the HS1182 (prototype Hawk). Whilst inverted. Being such a supremely experienced TP, he calmly remembered "I had this once when I was testing a Sea Fury", took the same recovery action and gingerly brought the aircraft home.
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Old 19th Mar 2014, 22:20
  #282 (permalink)  
 
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Devil

What a fantastic HF inject to add to the list.. Who in 15 pages saw a loose article control restriction on a resolver stick system with no mechanical linkage.
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Old 19th Mar 2014, 22:22
  #283 (permalink)  
 
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There has been some change in attitude on this thread now that human factors are in play
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Old 20th Mar 2014, 03:34
  #284 (permalink)  
 
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It certainly adds to one's confidence in the "return to service" statement of "highly unlikely to re-occur", now doesn't it?
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Old 20th Mar 2014, 06:58
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Having reviewed the first few pages of this thread, a hat tip to Steve Tonks for providing the clue as to where our thinking should have gone, and a glass of champers to Silverstrata at post 118, for listing the actual problem (control restriction) together with some possible sources of said restriction.

For the rest of us, responsible for producing multiple pages of speculative tosh, I recommend Thinking Fast, Thinking Slow by Daniel Kahneman. It will tell you exactly why all humans (yes that means you!) are pre-programmed to make bad judgements all of the time.

It's what we do.
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Old 20th Mar 2014, 07:01
  #286 (permalink)  
 
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Who in 15 pages saw a loose article control restriction on a resolver stick system with no mechanical linkage
Silverstrata in post 118
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Old 20th Mar 2014, 07:15
  #287 (permalink)  
 
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Can the pilot claim compo for his damaged camera?
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Old 20th Mar 2014, 08:37
  #288 (permalink)  
 
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Are there any similar sidestick incidents known in civil Airbus operation?

OAP
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Old 20th Mar 2014, 09:57
  #289 (permalink)  
 
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Just missed Captain and Camera.. RAF in flight magazines? LOL
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Old 20th Mar 2014, 10:05
  #290 (permalink)  
 
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Is there an intrinsic flaw in the side-stick design concept (given what happend to the Air France flight also)? I'm assuming this particular incident wouldn't have been possible with the traditional yoke.
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Old 20th Mar 2014, 10:13
  #291 (permalink)  
 
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Depends on the size of the captain's camera, innit.
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Old 20th Mar 2014, 11:29
  #292 (permalink)  
 
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Oops... Just noticed the incident is "classed as unique". So, no problem, it cannot happen again!

OAP
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Old 20th Mar 2014, 20:24
  #293 (permalink)  
 
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...Roadster 280...



This was not inadvertent... From what I understand, the operating crew disabled the warnings by virtue of pulling CBs.... Wilfully deviating from operating procedures.
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Old 20th Mar 2014, 20:33
  #294 (permalink)  
 
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Just Culture?

Erm, did the pilot say at any stage

"Oh, I put a camera down there and it turns out it's been damaged, so maybe the camera had something to do with it"

Or did the pilot keep schtum? Because if the pilot did, then that wouldn't be very 'Just.'
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Old 20th Mar 2014, 21:07
  #295 (permalink)  
 
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Not bad Photoplanet, 24 words and I count 4 factual inaccuracies in your post, could almost be a record

Whilst it was beyond doubt a monumental cock-up, you need to check "your understanding" of the facts. I have tried to find the SI or BOI but to no avail.
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Old 20th Mar 2014, 21:40
  #296 (permalink)  
 
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TBT

Not the findings but an interesting overview of error management here;

http://www.raes-hfg.com/engineering-...Brailsford.pdf
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Old 20th Mar 2014, 21:51
  #297 (permalink)  
 
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I think I can see now, a "unique event". No one would believe it could happen. How could it happen? How do all the other airliners fly without this happening? Answers to Wg Cdr Spry please.....
Hmmnn... The released report is disturbing from many aspects. Seems to me that they were seconds away from losing the aircraft. I estimate they must have reached approx 20 degrees of dive in about 10sec to achieve the 15,000'/min descent quoted within the 27sec event. Thank God the co-pilot was not in the loo, or further "down the back".
No mention of actual G or IAS/Mach ?

OAP
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Old 20th Mar 2014, 21:58
  #298 (permalink)  
 
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Originally Posted by Gordon Brown
Just Culture?

Erm, did the pilot say at any stage

"Oh, I put a camera down there and it turns out it's been damaged, so maybe the camera had something to do with it"

Or did the pilot keep schtum? Because if the pilot did, then that wouldn't be very 'Just.'
I'm not privvy to the investigation on whether there was admission early on or whether it came out after the DFDR was examined and pitch down was associated with the seat movement.

However if this is the case then it is a worrying aspect and to have a grounded fleet for a considerable period when an honest admission early on could have saved a lot of time and money.

Other cases spring to mind...
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Old 21st Mar 2014, 01:49
  #299 (permalink)  
 
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Are there any similar sidestick incidents known in civil Airbus operation?
Define similar. In my understanding of it, no.
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Old 21st Mar 2014, 02:25
  #300 (permalink)  
 
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If it turns out that the captain kept schtum about his camera then Wg Cdr Spry et al would be well-advised to seek an independent assessment of how well-embedded the just culture is. Fact is, it's very easy to write about and promote, but very difficult to apply, and is therefore a prime candidate for 'tick box' implementation (much like another great mantra 'people first').

Meanwhile, even allowing that the captain might not have realised that his camera was to blame, the fact that P2 reportedly returned to a 'disorderly' cockpit does not reflect particularly well on the captain's grasp of the warning system or the AP functionality... especially since he was pretty much the only person strapped in suitably for a negative g excursion and should have been best-placed to recognise indications!

On the light side, at least we can be thankful this didn't happen at the hands of a TP. If it had, they might have followed the Tri* precedent and banned some perfectly usable AP modes! ;-)
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