EH101 emergency landing
It shouldn't be inferred that one FADEC behaved in that way due to the other engines.
Join Date: Jan 2011
Location: on the cusp
Age: 52
Posts: 217
Likes: 0
Received 0 Likes
on
0 Posts
My suggestion is that the FADECs responded to what they were seeing at their own engines, and would do so in isolation not as a joint "logic" with the other engines.
So....any idea why in a three engine aircraft....two independent FWU's and an independent FADEC all decide to go Tits Up at the same time?
Inquiring minds wish to know!
Inquiring minds wish to know!
Join Date: Jan 2011
Location: on the cusp
Age: 52
Posts: 217
Likes: 0
Received 0 Likes
on
0 Posts
There are 3 engines, "3" FADECs and 3 freewheel units. They are of course linked mechanically. I can see why a FADEC would shut down an engine, or back it to IDLE, as a consequence of a freewheel failure. That is the point I was trying to make, the behaviour of the engines could be consistent with what they were seeing mechanically.
I agree on the two engines that had the Free Wheel failures....seems odd that two would fail at the same time.
The third FADEC should have gone to max power it would seem as its engine was the sole source of power as the other two had gone to idle due to the Free Wheel Units failing.
Why would the last good engine's FADEC go to idle is my question.....along with wondering about the odds of three such "failures" that put the aircraft on the ground with no useable engine power despite having three engines.
The third FADEC should have gone to max power it would seem as its engine was the sole source of power as the other two had gone to idle due to the Free Wheel Units failing.
Why would the last good engine's FADEC go to idle is my question.....along with wondering about the odds of three such "failures" that put the aircraft on the ground with no useable engine power despite having three engines.
Join Date: Jan 2011
Location: on the cusp
Age: 52
Posts: 217
Likes: 0
Received 0 Likes
on
0 Posts
I've assumed that the third engine was at idle deliberately and therefore was also part of the failure events. Rather than it being at idle as a result of the other two engines being shutdown. To me personally that hints at there being a problem with it too.
Or....as it was a training sortie....had the Instructor pulled the one engine back to idle to simulate an engine failure....then the other two engine FWU decide to start slipping and thus begat a real emergency?
The full account is going to make for interesting reading when it is available for consideration.
The full account is going to make for interesting reading when it is available for consideration.
The full account is going to make for interesting reading when it is available for consideration.
But I definitely hope that, whatever the problem was, someone knows about it who could do something to make sure it doesn't happen again - and has done just that!
airsound
Join Date: Jan 2011
Location: on the cusp
Age: 52
Posts: 217
Likes: 0
Received 0 Likes
on
0 Posts
AnFi is probably in a Rest Home having had a nervous breakdown upon reading the post that even mentioned a four engine helicopter.
Join Date: May 2005
Location: UK
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Join Date: Sep 2018
Location: Cloud cookoo land
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
A Merlin can definitely fly in a 40ft hover with one ECU shut down (because of FOD), one at fly and one increasingly destroying itself due to ice ingestion.
Makes a sound a bit like a Gazelle though.....
Makes a sound a bit like a Gazelle though.....
Amazing white elephant then, as it is now - A £40 million three engined aircraft that only has duplex redundancy.
Which bright spark signed this off?
An aircraft that can't go front line for fear of being shot at because of the cost of trying to repair carbon fibre holes in the field.
Which bright spark signed this off?
An aircraft that can't go front line for fear of being shot at because of the cost of trying to repair carbon fibre holes in the field.