ASK 21 grounded after November 30 ? ? ?

On Saturday, October 20, 2018 at 8:19:59 AM UTC-7, Charlie Papa wrote:
On Friday, 19 October 2018 13:15:04 UTC-4, Jock Proudfoot wrote:
Gliding International posted -ASK 21 is grounded after November 30

Who knows what ?

This from a "Reliable Source":
The Australian GFA (equivalent to Transport Canada) has issued a national AD for the ASK 21 because of a discovery of very fine hairline cracks in the glue joint between the wing skin and spar at the root rib. In his view, this is an overreaction and was also not discussed previously with the factory. Apparently, the GFA will soon be issuing a second AD which will allow the ASK 21s to resume normal flying operations. Both ADs only apply to ASK 21/ ASK 21 Mi sailplanes registered in Australia.

The GFA AD site appears to not work with Firefox. I was able to view the GFA AD 686 in Opera.

http://doc.glidingaustralia.org/inde...700&Itemid=101

Jim

On Sat, 20 Oct 2018 08:50:08 -0700, JS wrote:

On Saturday, October 20, 2018 at 8:19:59 AM UTC-7, Charlie Papa wrote:
On Friday, 19 October 2018 13:15:04 UTC-4, Jock Proudfoot wrote:
Gliding International posted -ASK 21 is grounded after November 30

Who knows what ?

This from a "Reliable Source":
The Australian GFA (equivalent to Transport Canada) has issued a
national AD for the ASK 21 because of a discovery of very fine hairline
cracks in the glue joint between the wing skin and spar at the root
rib. In his view, this is an overreaction and was also not discussed
previously with the factory. Apparently, the GFA will soon be issuing
a second AD which will allow the ASK 21s to resume normal flying
operations. Both ADs only apply to ASK 21/ ASK 21 Mi sailplanes
registered in Australia.

The GFA AD site appears to not work with Firefox. I was able to view the
GFA AD 686 in Opera.

http://doc.glidingaustralia.org/index.php?
option=com_docman&view=download&alias=2516-gfa-ad-686-
issue-1-2018-10-08&category_slug=gfa-ad-601-700&Itemid=101


It opened just fine in Firefox here.

More detail: I'm using Firefox 62.0.3 running under RedHat Fedora 28
Linux, using xpdf to display the PDF. xpdf is the default PDF display
application.


--
Martin | martin at
Gregorie | gregorie dot org

Technical Note issued by Schleicher. No AD yet. Inspection before December
31st, 2019.

https://www.alexander-schleicher.de/...210_TM41_E.pdf

On Saturday, October 20, 2018 at 11:50:09 AM UTC-4, JS wrote:
On Saturday, October 20, 2018 at 8:19:59 AM UTC-7, Charlie Papa wrote:
On Friday, 19 October 2018 13:15:04 UTC-4, Jock Proudfoot wrote:
Gliding International posted -ASK 21 is grounded after November 30

Who knows what ?

This from a "Reliable Source":
The Australian GFA (equivalent to Transport Canada) has issued a national AD for the ASK 21 because of a discovery of very fine hairline cracks in the glue joint between the wing skin and spar at the root rib. In his view, this is an overreaction and was also not discussed previously with the factory. Apparently, the GFA will soon be issuing a second AD which will allow the ASK 21s to resume normal flying operations. Both ADs only apply to ASK 21/ ASK 21 Mi sailplanes registered in Australia.

The GFA AD site appears to not work with Firefox. I was able to view the GFA AD 686 in Opera.

http://doc.glidingaustralia.org/inde...700&Itemid=101

Jim

Opened just fine in Chrome ....
Uli
'AS'

And opens fine with Safari on an iPad.

On Saturday, October 20, 2018 at 7:59:53 PM UTC-4, Charlie M. (UH & 002 owner/pilot) wrote:
And opens fine with Safari on an iPad.

Good on Firefox 62.0.3 on Mac OS High Sierra 10.13.6.

Dan

I inquired about this with Schleicher. This is only an Australian response to superficial cracking in the thickend resin around the spar butt at the wing root. These cracks are the subject of conversation at nearly every annual inspection of all ASK 21s that I look at. They show up fairly early in the service life and I have never seen any of them become more than superficial.
Rex Mayes

The voice of reason.

On Monday, 22 October 2018 15:07:20 UTC+11, Charles Longley wrote:
The voice of reason.

Unfortunately not. I inspected our club aircraft today. The crack has propagated into the bond between the root rib and the spar, right next to the front lift pin on both wings and is proceeding to zipper up the bond line. I'm aware of at least one other aircraft with exactly the same cracking. Happy to share high-res photos if anyone is interested. Far too big to post here. Ping me privately.