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-   -   EH101 emergency landing (https://www.pprune.org/rotorheads/576333-eh101-emergency-landing.html)

Sikorsky 19th Mar 2016 06:18

EH101 emergency landing
 
Local news "Viborg Folkeblad", near Karup Air Base (EKKA), reports that a danish Merlin EH101 Wednesday made an precautionary terrain landing. A military spokesman says that all danish EH101 are grounded, except lifesaving flights.

Sources within the military reports that all three engines stopped within few seconds and subsequent autorotation performed to an open field.

Karup-helikoptere sat ud af spillet - Viborg | viborg-folkeblad.dk

whoknows idont 19th Mar 2016 06:27

Calling AR after triple engine failure a precautionary landing...?

The SAR RC 19th Mar 2016 07:06

Is this a first in helicopter aviation? A triple engine failure.

GipsyMagpie 19th Mar 2016 07:41

Are the British ones grounded too?

Self loading bear 19th Mar 2016 07:44

Or a double pilot failure
Or a single fuel failure

GipsyMagpie 19th Mar 2016 08:36


Originally Posted by Sikorsky (Post 9315183)
Sources within the military reports that all three engines stopped within few seconds and subsequent autorotation performed to an open field.

Karup-helikoptere sat ud af spillet - Viborg | viborg-folkeblad.dk

It doesn't say that anywhere! Where are you getting this from? It says clutch problem which is probably something like the main/accessory drive not being in the engaged state. Not a triple engine failure!

Sikorsky 19th Mar 2016 10:21

That's one of the issues, that military gives one explanation to the press, but fact is probably different...

Mustapha Cuppa 19th Mar 2016 10:43


but fact is probably different...
So tell us. What are the facts in this case?

dangermouse 19th Mar 2016 17:01

remember this is a RUMOUR network!
 
so we are probably not getting anything like the full story. No doubt FH are on top of it, the appropriate specialists (none of whom are on this forum) will have the full picture

UK are still flying and I don't believe that any other EH101/AW101 are grounded so this suggests not a fleetwide/design problem

At some point all will be made clear I am sure

anyway congrats to the pilot for getting safely down

DM

airsound 1st Nov 2018 20:56

Well.... the excellent Flt Lt Ben Wallis (for it was he, in charge) has finally, 31 months later, been handed his well-deserved Air Force Cross by a fellow helo pilot, the Duke of Cambridge, aka Prince William.
https://www.forces.net/services/raf/...c034-440992797

But, Flt Lt Ben's undoubted courage and expertise aside, what bothers me is how a three-engined helo can suddenly run out of power. To say nothing of the fact that it was at night, and over forest. Anyone care to say what actually went wrong - or, better still, point me towards the Service Inquiry?

airsound

212man 2nd Nov 2018 11:47


or, better still, point me towards the Service Inquiry?
Why would there be an SI into a foreign air force's incident? However, I agree it would be nice to know what happened!

tottigol 2nd Nov 2018 17:00

Danish Merlins were originally RAF owned, there perhaps is the reason why.

Evalu8ter 2nd Nov 2018 17:36

Totti,
Think it was the other way round. We bought 6 Merlins of the Danes in an attempt to respond to the "lack of helicopters" criticism in Afghanistan. We bought the Danes 6 replacement aircraft.

Airsound,
The Merlin is an underpowered / undertransmissioned beast - a circa 11000kg empty aircraft with a max TOW of just 15600kg. At high weights and low airspeed it can be poorly placed…..

None of which detracts from the fact that the lad done good….

Misformonkey 2nd Nov 2018 19:08

Broad spectrum but software problem or fuel to cause a triple ECU failure?

airsound 2nd Nov 2018 19:53

Evalu8ter - I get that

At high weights and low airspeed it can be poorly placed…..
but surely this event was much worse than that? Something like Misformonkey's "triple ECU failure"?

I imagine current Merliners must be familiar with the story behind this, happily uneventful, event.

airsound

212man 4th Nov 2018 10:10

I believe it is as caused by freewheel units slipping leading to two engines shutting down through over speed and the third going to an idle power setting due to some FADEC logic.

SASless 4th Nov 2018 18:46

Some logic... two enigines shutdown and the FADEC puts the last Engine to Idle!

That sounds just a bit odd.

212man 5th Nov 2018 04:18


Originally Posted by SASless (Post 10301593)
Some logic... two enigines shutdown and the FADEC puts the last Engine to Idle!

That sounds just a bit odd.

I don’t disagree!

Cows getting bigger 5th Nov 2018 07:03

How to make a twin turbine helicopter even more complex. Add a third engine. :)

dClbydalpha 5th Nov 2018 07:33


Originally Posted by 212man (Post 10301178)
I believe it is as caused by freewheel units slipping leading to two engines shutting down through over speed and the third going to an idle power setting due to some FADEC logic.

In my opinion, the FADECs would be responsible for all the engines' behaviour. In this case one of the engines encountered different conditions and so the FADEC responded differently. It shouldn't be inferred that one FADEC behaved in that way due to the other engines.


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