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-   -   SIA 777 off the rwy at EDDM (https://www.pprune.org/rumours-news/468083-sia-777-off-rwy-eddm.html)

lomapaseo 14th Nov 2011 20:29


please excuse the dumb question, Slayerdude, but how can you tell from the video that reverse thrust wasn't activated?
Thanks.
are we discussing activated or commanded :confused:.

The pilot does the commanding but the reverse only activates once all the aircraft systems are satisfied.

To my knowledge all the contributing factors in this regard are not yet known to us.

slayerdude 15th Nov 2011 01:07

Vested.... The pilot has to manually put engines in rev.... N m not makin observations ... M confirming No rev selected....

380 .... Auto land available in land 3 or land 2 verified at 500ft(fail passive system).... Flare capture at 40ft, idle at 25 ft n rollout in gnd mode...all 3 annunciations wont be available with no autoland eicas msg

Fd system has 3 sec memory of last track to take care of scalloping..... If loc signal was to the left for more than 3 secs.... Yep ... Fd will take last signal reference ..... Hence veering left.... To correct might hav used tiller ... N tiller to be used only below 30 knots... High speed tiller used might hav created the violent swing to the right..... Speculation only .....

Dynasty Trash Hauler 17th Nov 2011 14:51

" a few days after the incident in which former CEO ... Dr. CHEONG said verbatim" this is our airplane, these are our pilots and we take full responsibility"

Yep, a few days is a long time following an accident.

SQ were forced to make this admission after totally botching the PR immediately following the accident.

alph2z 20th Nov 2011 00:42


... To correct might hav used tiller ... N tiller to be used only below 30 knots... High speed tiller used might hav created the violent swing to the right.....
An AF346 747 captain wrongly used the tiller (Aug 8th 2008 at CYUL) and caused the plane's nose to go off the runway.

totempole 20th Nov 2011 17:06


An AF346 747 captain wrongly used the tiller (Aug 8th 2008 at CYUL) and caused the plane's nose to go off the runway.
Can you elaborate on that? I have never heard of it; and doubt that such a senior pilot ( to be a B747 skipper I guess one should be fairly senior within the ranks ) would use the tiller at high speed. And AF is a good reputable airline from the first world, is it not?

hetfield 20th Nov 2011 17:35


And AF is a good reputable airline from the first world, is it not?
Off topic,

but I'm not sure latest AF incidents/accidents can proof that...

lederhosen 20th Nov 2011 17:48

May not be relevant but the Munich Atis today included a warning that the runway might be slippery due to de-icing fluid. In Munich the de-icing is carried out immediately before the runway. A russian A310 coincidentally slipped of the runway close to this point some time ago on take off with asymetric spooling up of the engines. It has never seemed paricularly slippery to me, but then you might only notice it when it is too late and were not expecting it....food for thought.

slayerdude 20th Nov 2011 18:57

Leder..... Certainly relevant info....and pertinent ... However don't think de icing was required on said day of incident.....

Dani 20th Nov 2011 19:07

and if it's slippery it slips along the approach axis. Slippering makes corrections (left, right, deceleration) more difficult. Not making it going left and right!

lederhosen 20th Nov 2011 20:15

I was not flying that day so I cannot say if anyone availed themselves. However LH by far the biggest users of the airport are enthusiastic de-icers even when it appears relatively warm.

I am not quite sure about your point Dani. If the aircraft was for some reason already heading off to one side a slippery runway would definitely make things more difficult.

The high speed excursion in Denver was another example of a captain misusing the tiller at high speed by the way Totempole.

The de-icer fluid is probably not relevant. But the Atis message did make me think.

hetfield 20th Nov 2011 21:06


However LH by far the biggest users of the airport are enthusiastic de-icers even when it appears relatively warm.
Indeed....... especially when one of the Lufties starts with that nonsense. All other will follow.

alph2z 20th Nov 2011 22:53

Stabilized Video of Landing

.

misd-agin 21st Nov 2011 00:23

hard to tell for certain but it looks like the spoilers were not extended.

alph2z 21st Nov 2011 22:13

In the video we can see a direct hit to the engine by dirt thrown up by the digging in of the nose gear. :sad:

Also, later, as the MLG goes back onto the runway, we can see gray smoke probably from the MLG as it "slides" sideways. (see photo also)

I'm impressed with the MLG and the tires :D

lomapaseo 22nd Nov 2011 02:18


In the video we can see a direct hit to the engine by dirt thrown up by the digging in of the nose gear
Not necessarily.

If the engines were damaged it could be from dirt thrown up with the reversers deployed.

The nose gear wake is designed to keep puddled water out of the engines and methinks that also applies to dirt

CDRW 24th Nov 2011 15:31

Lomapaseo - a few points.

The reversers where never deployed.

I agree with you about the nose wheel wake being kept out of the engines - BUT - that is under normal operations. When one is on the gravel doing a 12 wheel drift in the 777, the chances of debris being ingested by the engines, caused by the nosewheel is very much higher!

alph2z 27th Nov 2011 00:34

When the nose gear fell fast and dug into the grass, the nose gear was right of the right-MLG's longitudinal axis, thus the plane's nose whipped to the right and eventually back onto the runway with the rear of the plane whipping around the nose; thus the very curved marks in the grass.

From the MLG tire marks as it went back onto the runway I estimate that the plane's tires were moving/sliding 25 degrees off the plane's longitudinal axis !

I'd love to hear what the passengers had to say about the ride.

M.Mouse 30th Jan 2012 17:27

The Aviation Herald synopsis of the German report makes interesting reading.

Found here.

hetfield 30th Jan 2012 18:40


When the Boeing 777-300 descended through 30 feet AGL, the aircraft began to roll left,
I don't understand. If the aircraft, for whatever reason, isn't where I want it in 30 ft AGL..... TOGA!

No matter windshear, ****** up automatics, gusts, whatever...

Rory Dixon 30th Jan 2012 19:41

The original status report (in German) you find here on page 24 - 37.


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