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Emirates B777 gear collapse @ DXB?

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Emirates B777 gear collapse @ DXB?

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Old 7th Aug 2016, 04:59
  #541 (permalink)  
 
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Looking at the video of the removal of the aircraft, it appears that the nose gear is not fully retracted (or extended for that matter)
I asked myself whether this earlier photo suggested that the nose gear door was open.

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Old 7th Aug 2016, 08:09
  #542 (permalink)  
 
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I was taught from about day one in the Sim to know how far forward the thrust levers were at TOGA on the 777. It was about Arms length from memory and anytime I needed to select TOGA I always made sure my Arm was nearly straight.

If the Thrust levers weren't moving forward quick enough they got a big shove.......

Still anything can happen when the **** hits the fan and humans do funny things under stress when tunnel vision sets in.......
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Old 7th Aug 2016, 08:26
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I apologise if this has been mentioned earlier, but it might be hidden in 28 pages.
There was speculation about a late ATC call for GA; there was speculation about a GA after a bounced landing; there was speculation about a late WS induced GA. Has the real reason for what appears to be an attempted GA been established?
Much of the debate seems to be about why/what went wrong during such an attempt.
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Old 7th Aug 2016, 09:16
  #544 (permalink)  

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I apologise if this has been mentioned earlier, but it might be hidden in 28 pages.
There was speculation about a late ATC call for GA; there was speculation about a GA after a bounced landing; there was speculation about a late WS induced GA. Has the real reason for what appears to be an attempted GA been established?
Much of the debate seems to be about why/what went wrong during such an attempt.
Assuming the eventual report is factual then we will learn the sequence of events and the reasons for the crash. Until then all the postings here, the majority of them complete nonsense, are utterly pointless.

Quite why so many people wish to contribute their pet theory, often identical to an earlier poster's theory, is beyond me.

I currently teach both B777 and B787 conversion courses. I have a thorough knowledge of how the aircraft behave and have observed many interesting pilot actions in given situations but what purpose would it serve for me to try and guess what happened?

The moderators are doing a good job removing the majority of the more outlandish and pointless rubbish.
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Old 7th Aug 2016, 09:46
  #545 (permalink)  
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B777 TO/GA Switch op's.

1. GA mode is inhibited on ground
2. TO mode is inhibited in the air (and >50 knots on ground)
3. Speed brakes, if armed, require air ground inputs and MLG tilt press inputs to deploy - Tilt pressure is so a "bounce" won't deploy them.
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Old 7th Aug 2016, 10:02
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Ratty....

The short (and complete) answer is "..that information is not in the public domain".

I think only two bits of information are "out there"...if they are full/correct/to be believed.

1. The DXB Tower recording (make of that what you will)
2. Pilot/eye-witness awaiting departure, reported by Indian newspaper (no name given)

....and there's no indication as to "the why" in those little factoids (if they are correct/full/etc.etc,etc).

That's ya lot I'm afraid.
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Old 7th Aug 2016, 10:12
  #547 (permalink)  
 
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So after 28 pages it seems the aircraft came in hot and high, smashed into the runway causing it to bounce. The crew attempted a go around but didn't firewall the throttles but did raise the gear. Period. All kudos to the cabin crew for getting everyone off. There should be an automatic fine for pax retrieving their belongings from overhead lockers. End of.
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Old 7th Aug 2016, 10:18
  #548 (permalink)  
 
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Recommendations. Retrain crew or fire the P1. NO AUTOTHRUST below 1000ft except for CAT 111 operations.
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Old 7th Aug 2016, 10:26
  #549 (permalink)  
 
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Looking at the video of the removal of the aircraft, it appears that the nose gear is not fully retracted (or extended for that matter)
I asked myself whether this earlier photo suggested that the nose gear door was open.
There was a link earlier in he thread showing the a/c being dismantled and removed showing one of the nose gear doors open.
It could of course be due to the impact but it could also mean the gear was cycling, up probably, but who knows just yet. I can't find the link now, was it deleted?
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Old 7th Aug 2016, 10:41
  #550 (permalink)  
 
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Found it. From the other thread in Middle East forum.
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Old 7th Aug 2016, 10:45
  #551 (permalink)  
 
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Here is a video of a 777-300 retracting it's gear after departure. The whole sequence takes about 12 seconds. One of the LAST visible things happening is nose gear closure, at about 12 seconds.
https://m.youtube.com/watch?v=VzFJtB2Ar0g

There was an pilot/eyewitness who reported that EK521 was at 40-50 feet, at the threshold, with the gear down. Apparently this was communicated in a pilot whatsapp group.

So if your approach speed is, say, 150 kts and decaying, at the threshold at 40 ft. That gives a nice educated guesstimate for the beginning of the event sequence.

From the threshold at 40ft, a go-around is initiated. The gear lever is raised 2 seconds later. The a/c settles on the runway 12 seconds after that, at a badly decayed speed coming from 150kts. Is 120 kts a good guesstimate?

That is 135kts as an average speed between the threshold and touchdown after 14 seconds.
135kts is 250 km per hour. That is 69.44 meters per second. That means that the a/c touched down at about 1000 meters beyond the moment that the gear lever was raised.

They ended up near M13. Facing west (towards Mecca)
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Old 7th Aug 2016, 11:14
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I hear from good authority that the F/O and family are under arrest! He's charged with lack of support to the Captain!
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Old 7th Aug 2016, 11:16
  #553 (permalink)  
 
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From the threshold at 40ft, a go-around is initiated. The gear lever is raised 2 seconds later. The a/c settles on the runway 12 seconds after that, at a badly decayed speed coming from 150kts. Is 120 kts a good guesstimate?

Surely, the gear shouldn't be selected UP until "positive rate" is announced?
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Old 7th Aug 2016, 11:22
  #554 (permalink)  
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I sincerely hope that report, Chitterne, is complete rubbish.
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Old 7th Aug 2016, 11:26
  #555 (permalink)  
 
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Originally Posted by TheChitterneFlyer
I hear from good authority that the F/O and family are under arrest! He's charged with lack of support to the Captain!
I don't believe for a minute that such a charge exists, even in UAE.
PLEASE tell me I'm not wrong.
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Old 7th Aug 2016, 11:31
  #556 (permalink)  
 
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Hey guys look......... someone's mentioned positive climb gear up again.............I'm feeling like its Groundhog Day........
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Old 7th Aug 2016, 11:31
  #557 (permalink)  
 
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Under arrest? Don't be surprised and don't be surprised if you are arrested or questioned for some hours next time you go to Dubai because of things you posted here.
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Old 7th Aug 2016, 11:37
  #558 (permalink)  
 
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Is there any documented evidence of people being arrested for posting on an internet forum. Anywhere, not just UAE.
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Old 7th Aug 2016, 11:43
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There is a link in this forum from the UAE authorities clearly stating that sharing information and videos about this event is verboten so this is grounds for arrest
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Old 7th Aug 2016, 11:52
  #560 (permalink)  
 
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Yes the threat was to UAE residence....yes they actually spelt it that way...!!
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