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EC225 crash near Bergen, Norway April 2016

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EC225 crash near Bergen, Norway April 2016

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Old 13th May 2016, 09:29
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They sort of are but aren't.

EASA Member States as at July 2014.


Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta,Netherlands Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,Sweden, Switzerland, United Kingdom

Regards to ya all. Big E

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Old 13th May 2016, 09:35
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This is probably many times the number of pages in the FAR 29 regulations at the time the EC225 was FAA certified
Bear in mind this is the AC and it addresses Part 29 at its various Amendment states, so with some degree of 'duplication' (for want of a better expression) and is also a guide on 'how to' as opposed to 'what to' so each requirement is expanded upon.
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Old 13th May 2016, 10:25
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Maintenance Speculation

Despite all the speculation about potential maintenance issues it would seem, as is so often the case, that there is not one blindly obvious explanation for this incident. TBF given HS/CHC's reputation as a top notch maintenance outfit it would be extremely surprising if this was the case.

Despite the pressure the various authorities must be under to release some news or relax the ban, if they felt it was safe to do so they would have surely done so by now. Consequently I'm a bit confused by the statement from Airbus. When they stated on 1 May; "Considering the additional information gathered during the last 48 hours, Airbus Helicopters’ decision, at this stage, is to not suspend flights of any nature for the EC225LP".

Given that the Norwegian and British authorities must also be in possession of this information it is strange that 13 days later they haven't releaxed the ban.

It is unsurprising that the regulators are more cautious than the manufacturer here but they will usual make statements when significant information comes to light. Their statement of 3 May didn't really endorse Aibus Helicoters' comments.

Does anyone know if there are any planned press conferences/announcements or will they not release any information until they feel they have something significant to say?
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Old 13th May 2016, 10:45
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sorry hadn't seen this

The Norwegian CAA and UK CAA introducing restrictions to the AS332L2 Super Puma -
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Old 13th May 2016, 11:02
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Mr Birmingham, according to this link

Helikopter styrtet ved Turøy - NRK Hordaland - Lokale nyheter, TV og radio

which translated says that there will a press conference tonight at 6:30pm norwegian time where the preliminary accident report will be presented by the AIBN.
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Old 13th May 2016, 11:07
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Thank you - let's hope some useful evidence has com to light
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Old 13th May 2016, 11:16
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The air accident investigators have to do rather more than just find the cause of an accident. Reporting that a bolt snapped under excessive load or a part was misfitted during maintenance simply identifies the immediate cause of that particular incident. The chain of events leading up to the failure has to be identified and remedial measures suggested to prevent a recurrance. That requires some quite detailed discussions with the aircraft manufacturer and maintenance organisations and possibly lengthy engineering tests before any detailed report will be published.
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Old 13th May 2016, 11:22
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With all the 1309 discussion it should always be understood, that this is not covering human error, neither during maintenance not during operation. It just covers all technical failure cases which are related to the type desgn.
There are always good chances that human action can cause catastrophic failure.
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Old 13th May 2016, 11:38
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Originally Posted by birmingham
Given that the Norwegian and British authorities must also be in possession of this information it is strange that 13 days later they haven't releaxed the ban.

It is unsurprising that the regulators are more cautious than the manufacturer here but they will usual make statements when significant information comes to light. Their statement of 3 May didn't really endorse Aibus Helicoters' comments.
Indeed, this sustained contradiction is a bit surprising. Possibly AH was a bit too optimistic with their early conclusion based on what was known then and now don't know how to retreat from their statement.
Still it would be quite embarrassing for them should come out that their relatively definitive statement was premature and wrong.
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Old 13th May 2016, 12:33
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Birmingham

Given that the Norwegian and British authorities must also be in possession of this information it is strange that 13 days later they haven't releaxed the ban.
As you point out in your next post, they have actually extended the ban to the 332L2.

I am quite prepared to be proved wrong, I would welcome it but I am not going for the bolt/pin/nappy pin theory. I am leaning towards a repeat of G-REDL.
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Old 13th May 2016, 15:28
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@industry insider: I am the very same opinion as you are: Repeat of G-REDL might be the ’causa’ or the root, the separated rotor head is only the fatal and deterrent effect. But between those is the question of redundancy and the quality of engineering.
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Old 13th May 2016, 16:56
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I know you think you understand what you thought I said but I'm not sure you realize that what you heard is not what I meant'

Alan Greenspan, head of the Fédéral Reserve
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Old 13th May 2016, 16:57
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http://www.aibn.no/About-us/Nyhetsarkiv/The-Helicopter-Accident-Preliminary-report?iid=19654&pid=SHT-Document-Attachments.Native-InnerFile-File&attach=1
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Old 13th May 2016, 17:23
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So it looks the 2 aft suspensions bars were ripped off the fuselage including the foundation hinges. Probably after first failure of either: the epicyclic module or the front suspension bar upper hinge point (and following epicyclic failure or Gear housing after extensive uneven loading)

This makes maintenance mistakes at the difficult to access forward bottom hinge point less probable. Unless the forward suspension bar has not been found on the Main wreckage, and would have broken at two ends.

SLB
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Old 13th May 2016, 17:40
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The above link to the preliminary report doesn't work for me, so I'm posting as well: http://www.aibn.no/Om-oss/Nyhetsarki...-File&attach=1
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Old 13th May 2016, 17:42
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Google translate news from press conference (With pictures of gears)
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Old 13th May 2016, 18:13
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hard to understand the translation...

I read it as suggesting the support bracket bolts may have failed? - or am I reading it completely wrong?
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Old 13th May 2016, 18:27
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From the google translated (Hoping for another translation soon, and tip the cap to those hard working folks on the investigation team:


1) Is that a sun or a planetary gear from the epicyclic? (ouch, look at the damage to those gear teeth!)
2) What is the significance of that electronics box?
3) I see the "nappy pin" still attached to that end of that strut/support. Now have an idea on the size of pins/bolts.
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Old 13th May 2016, 20:37
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Why did the Norwegians show this from the crashed 225?

This is one of the parts that the Norwegian Accident Investigation Board showed to the public 05/13-2016 regarding the 225 accident outside Tyrøy.
It´s supposed to be engine control electronics.
Why did they show this part?motor-control-225-turoy-MG_0324.jpg
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Old 13th May 2016, 20:46
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Damaged sun gear 225

This is a sun gear from the HC225 that crashed two weeks ago in Norway. The Norwegian Accident Board showed this to the press today, 05/13-2016 - what does the damage on the gear show?/Users/Sandberg/Desktop/sun-gear-225.jpg

Last edited by halsandberg; 13th May 2016 at 21:14.
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