Today's Message Index:
----------------------
1. 08:16 AM - CH601 XL grounded in Holland (David Johnson)
2. 08:31 AM - Re: CH601 XL grounded in Holland (Craig Payne)
3. 09:16 AM - Re: CH601 XL grounded in Holland (Iberplanes IGL)
4. 02:39 PM - XL wing fold in flight (roger cornwell)
5. 04:39 PM - Re: XL wing fold in flight (swater6)
6. 08:32 PM - Re: XL wing fold in flight (Rick Lindstrom)
Message 1
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| Subject: | CH601 XL grounded in Holland |
I've just seen a report on the UK LAA website forum that the Dutch have
grounded all CH601XL aircraft, following a crash (2 fatalities)
attributed to the wings folding.
This is the link to the Dutch report - not much use unless you can read
Dutch!
http://www.ivw.nl/actueel/nieuws/inspectiehoudttwaalfsportvliegtuigjesaan
degrond.aspx
Has anyone any further news on this? I understand the crash was in
September.
Dave Johnson
CH601XL - Jab. 3300 - (still) hoping to fly soon.
Do not archive
Message 2
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| Subject: | CH601 XL grounded in Holland |
Here is a translation via Google:
http://tinyurl.com/63njec
"Inspection takes twelve sport airplanes on the ground
Nieuwsbericht | 24-10-2008 News | 24-10-2008
The IVW has Friday, October 24, 2008 decided that in the Netherlands until
further notice may no longer be flown with the Zenair Zodiac CH601 XL. This
is the result of the preliminary results of the investigation into the
accident with a sport plane on Sept. 14 at Marker at Horn, in which two
passengers died. In the Netherlands there are twelve XL's registered.
>From preliminary examination of the Research Council for Safety and
technical experts from the inspection showed that the plane crashed because
the right wing folded up. From 2006 until today have at least seven
accidents worldwide with the Zenair Zodiac CH601 place where one or both
wings collapsed. The investigation of these cases and that in the
Netherlands has no single cause, but there are indications that the maximum
strength of the aircraft is insufficient for normal expenses during the
flight to contribute.
It is an American design. In the Czech Republic is this unit for the
European market built and tested in Germany. The German and Dutch
airworthiness criteria are the same."
-- Craig
Message 3
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| Subject: | Re: CH601 XL grounded in Holland |
Bad news David,.
2008/10/25 David Johnson <david_a_g_johnson@btinternet.com>
> I've just seen a report on the UK LAA website forum that the Dutch have
> grounded all CH601XL aircraft, following a crash (2 fatalities) attributed
> to the wings folding.
>
> This is the link to the Dutch report - not much use unless you can read
> Dutch!
>
>
> http://www.ivw.nl/actueel/nieuws/inspectiehoudttwaalfsportvliegtuigjesaandegrond.aspx
>
> Has anyone any further news on this? I understand the crash was in
> September.
>
> Dave Johnson
>
> CH601XL - Jab. 3300 - (still) hoping to fly soon.
>
> Do not archive
>
>
> *
>
> *
>
>
--
Alberto Martin
www.iberplanes.es
Igualada - Barcelona - Spain
----------------------------------------------
Zodiac 601 XL Builder
Serial: 6-7011
Tail Kit: Finished
Wings: Not Started
Fuselage: Ordered
Engine: Jabiru 3300
Message 4
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| Subject: | XL wing fold in flight |
Hi XL owners/operators
This is my first posting, as iam consideringbuying an XL (already built)
=C2-
I have heard that 7 Zodiacs have had the wings fold in flight due to struct
ual failure, maybe inside or outside the flight envelope. The lastest happe
n in Holland in the last week, with unfortunately 2 killed. Zodiacs are gro
unded in Holland at the moment
=C2-
Can anyone shed any light on this issue, and should i be concerned in purch
asing an XL? I am an experienced pilot of 20 years, and fly straight and le
vel, generally in crusing mode
=C2-
thanks in advance
roger
Message 5
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| Subject: | Re: XL wing fold in flight |
Roger,
You've just opened Pandora's box. Who knows what responses will follow and you'll
see many varied opinions. Since the NTSB reports are not final for the two
recent LSA accidents, you'll have to guess like the rest of us.
Here is some simple advice. Pretend you're about to go on a flight and you're looking
at the weather. Take in all of the information you can find and YOU determine
if what you see falls within your personal minimums.
Your minimums will be different than others. Not wrong, just different.
Best of luck.
Scott
--------
601 XL kit N596SW reserved
Tail, control surfaces and both wings complete. Now working on fuselage
www.scottwaters.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=210280#210280
Message 6
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| Subject: | Re: XL wing fold in flight |
Hi, Roger.
If you search the archives, I'm sure you'll have no trouble finding all sorts of
posts containing everything from informed opinion to wild speculation. As you
probably already know, a group recently splintered off to form its own investigative
list and solicited funds to perform an independent stress analysis of
the wing, spar, and fuselage attach points. Haven't yet heard anything concrete
from their findings.
If you scratch a bit below the "7 crashed 601s involving wing folding / failure,"
you'll find that the accidents in question don't (yet) have an obvious failure
mode that ties them all together. It's most likely true that wing failure
at the rear spar attach point is the ultimate catastrophic failure point after
several suspect things happen to the airframe first. So far, the list seems to
include accumulated airframe stress from unauthorized aerobatics, exceeding
airframe design limits, sudden and excessive down elevator deflection, airframes
constructed with lighter or inferior materials to meet non-U.S. standards for
the desired category, runaway control surface flutter, and fretting from loose
spar attach bolts. Those are just the ones I can recall off of the top of
my head.
I do know that when I fly my own 601, these crashes lurk in the back of my mind
at all times. On the other hand, I know my 601's airframe has made several long
cross-country trips, one coast-to-coast, through all sorts of weather and turbulence
and it still shows no signs anywhere of any accumulated stress risers
or cracks, fretting, part deformation, flutter, or any other airframe anamoly.
And I do check it carefully.
I also speak with the Heintz's on a semi-regular basis about this topic. They've
been working diligently with the NTSB to come up with a common causal factor,
so far without finding one. In this case, no news is actually good news. The
601 design has flown many tens of thousands of hours over the years, and so far,
no single weak point has been fingered as the instigator in the 7 crashes.
And my insurance for my 601 is only about $800 per year, so the underwriters
still appear to have confidence in the design.
Frankly, there are quite a few people who are really spooked by these crashes,
to the point of being afraid to fly in them anymore. There are a ton of 601s for
sale, no doubt this fear has something to do with it. But the more I fly my
own, the more confidence I have in it. However, I do a very thorough preflight,
I don't get horsey on the controls, and I stay alert for anything that might
fortell any sort of impending airframe failure.
And then I go fly and enjoy the heck out of it.
Rick Lindstrom
N42KP / ZenVair 601XL
-----Original Message-----
>From: roger cornwell <kitfoxuk@btinternet.com>
>Sent: Oct 25, 2008 5:38 PM
>To: zenith601-list@matronics.com
>Subject: Zenith601-List: XL wing fold in flight
>
>Hi XL owners/operators
>This is my first posting, as iam consideringbuying an XL (already built)
>
>I have heard that 7 Zodiacs have had the wings fold in flight due to structual
failure, maybe inside or outside the flight envelope. The lastest happen in Holland
in the last week, with unfortunately 2 killed. Zodiacs are grounded in
Holland at the moment
>
>Can anyone shed any light on this issue, and should i be concerned in purchasing
an XL? I am an experienced pilot of 20 years, and fly straight and level, generally
in crusing mode
>
>thanks in advance
>roger
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