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An-2 TBC-2MC (Honeywell remotorized) crashed in Naryan-Mar

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An-2 TBC-2MC (Honeywell remotorized) crashed in Naryan-Mar

Old 19th Dec 2017, 09:58
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An-2 TBC-2MC (Honeywell remotorized) crashed in Naryan-Mar

At takeoff



11 on board, 2 reported dead (woman and child)

IAC: http://mak-iac.org/en/rassledovaniya...60-19-12-2017/

Plane: https://russianplanes.net/reginfo/111965

UPD: 2 dead on site, 2 in hospital which brings death count to 4 now

UPD2: Preliminary cause according to MAC (IAC) is engine failure.
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Last edited by Kulverstukas; 19th Dec 2017 at 16:23.
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Old 19th Dec 2017, 14:23
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Control Problems?

Looks like a control problem-not hot dogging. Something like a control lock or aft c.g, or control system FOD.
Once the crew recognized the uncontrollable pitch up, seems like they did a pretty good job by rolling to the nearest horizon and letting the nose fall, but they were not quite able to roll back to wings level before intersecting the ground. Their sink rate was nearly stopped, and that must account for the relatively low fatality count.
I was not able to get the Russian link to open, so I do not have the local comment that probably is more specific as to cause.
The two fatalities are a sad reminder of the inherent dangers in aviation. R.I.P.
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Old 19th Dec 2017, 16:08
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It could as likely be a turn back to the runway in use following, say, an engine problem.
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Old 19th Dec 2017, 16:52
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Looks more like a control lock problem. A controllable AN2 you get about anywhere on the ground so no need to turn back to the runway. They where obvious too slow. Even if the pilot had the idea to turn back he would have traded that little altitude for speed.
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Old 19th Dec 2017, 16:53
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I guess the footage could be interpreted in different ways. Looks to me like a stall with the right wing dropping, picking up a bit and then turning into the beginnings of a spin. We'll have to wait for the report to know for sure of course.
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Old 19th Dec 2017, 16:54
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It could as likely be a turn back to the runway in use following, say, an engine problem.
Not a recommended option at low level I thought.
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Old 19th Dec 2017, 19:22
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An engine failure should not have this consequences, particularly on the AN2. Looks like loss of control, question is why. Turn back to the field could be one reason but again, why you can land the AN2 almost eveywhere.
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Old 20th Dec 2017, 00:15
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Accelerating towards the ground seems to indicate a stall.
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Old 20th Dec 2017, 00:36
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The AN2 cannot stall, the worst it can do is mush into the ground at parachute descent speed. SOP for engine failure in IMC is stick hard back, slats open automagically and it mushes harmlessly into whatever terrain is around.The only logical reason for this one as filmed is an elevator jam hard upwards.
They did well to manage to hit the ground in a level attitude.
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Old 20th Dec 2017, 02:53
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Looks like an aft C.G. or elevator locked.
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Old 20th Dec 2017, 12:22
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Local people confirmed power loss on TO, attempt to turn back because of fence and forest on the course.
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Old 20th Dec 2017, 12:37
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Must be a rare thing to have some turboprop fail this way. Hope they used the right fuel.
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Old 20th Dec 2017, 14:07
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Lokking at the foreground, my first thought was ice!
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Old 20th Dec 2017, 14:15
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Originally Posted by The Ancient Geek
The AN2 cannot stall, the worst it can do is mush into the ground at parachute descent speed. SOP for engine failure in IMC is stick hard back, slats open automagically and it mushes harmlessly into whatever terrain is around.The only logical reason for this one as filmed is an elevator jam hard upwards.
They did well to manage to hit the ground in a level attitude.
The AN2 certainly can stall. It won't stall decelerating in level flight because as you state it ends up just mushing into the ground at high AOA. Pitch the nose up 20 or 30 degrees however and it will decelerate rapidly and stall like any other aircraft.
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Old 20th Dec 2017, 14:48
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Thats one thing I was never daft enough to try. Not sure if it is even possible with the original piston engine.
Lots of fun tricks like landing with zero ground speed or even backwards in a headwind but aerobatics was never on my list.
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Old 20th Dec 2017, 14:57
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It's not certified for aerobatics.
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Old 20th Dec 2017, 17:45
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https://yandex.ru/maps/-/CBaDY-ehTA
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Old 20th Dec 2017, 19:08
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I watched an An2 get airborne at the piano keys at Holguin, Cuba. He was airborne at probably over 100' by the time he had passed the far end of the keys. He took off with most of the runway behind him and about 200' beyond the keys in front. With a slight tailwind.
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Old 21st Dec 2017, 08:05
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Standard ICAO threshold markings are 30 m long, which is close enough to 100 ft, so if he was airborne at the markings, and 100 ft in the air at the far end of the markings, that would mean that he climbed 100 fr in 100 ft, or a climb angle of 45 degrees ... with a tailwind.


That seems a bit ... improbable.
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Old 21st Dec 2017, 09:48
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A slight tailwind and improbable as it seems it was remarkable. He had just dropped pax at the military terminal and had a very short taxi to the threshold.
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