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#1
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Glasflugel AD
EASA have issued an AD - 2011-0213 for inspection of the elevator push
rod on pretty much all designs from the Libelle onwards. The AD lists "Kestrel" as one of the affected types. My question is - does this apply to the Slingsby built Kestrels - do I have to take my T59 apart? Will do so anyway for it's annual airworthiness test , but would be nice to know if I have to replace bits before I get there... -- Bruce Greeff T59D #1771 |
#2
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Glasflugel AD
On Sat, 05 Nov 2011 19:20:45 +0200, BruceGreeff wrote:
EASA have issued an AD - 2011-0213 for inspection of the elevator push rod on pretty much all designs from the Libelle onwards: - all BS1, Club Libelle 205, Hornets, Mosquitos, Kestrels, all 304s except B, C and CZ variants - so far, so good. All these are T-tail gliders: the AD photos show that its the vertical push-rod in the fin that's being checked, so that all makes sense. - In addition, two specific aircraft are mentioned: Std. Libelle H.201b s/n 169 Libelle 203, Std. Libelle H.204 s/n 1 The 203 (2 built) and 204 (1 built) are presumably prototypes for a Libelle replacement, but what about the H.201b, s/n 169. Does anybody know anything about these three variants? I'm curious. The AD lists "Kestrel" as one of the affected types. My question is - does this apply to the Slingsby built Kestrels - do I have to take my T59 apart? Glasfaser says it applies to all Kestrels, type 401. The BGA doesn't say anything different. The copy of the AD 2011-0213, http://ad.easa.europa.eu/blob/easa_a...AD_2011-0213_1 referenced from the BGA website has additional notes about a few specific gliders identified by s/n over the range 86-125. Since Slingsby built the T.59 under license, I'd guess that the type certificate holder is Glasfaser, who took over maintenance for all Glasflugel gliders when the original outfit folded. The AD directs all queries, etc. to Glasfaser. Will do so anyway for it's annual airworthiness test , but would be nice to know if I have to replace bits before I get there... As the type certificate holder appears to be Glasfaser, your best bet would be to ask them. I've found them to be friendly and helpful when I've needed to contact them: http://www.streifly.de/ -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
#3
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Glasflugel AD
On Sat, 5 Nov 2011 20:31:33 +0000 (UTC), Martin Gregorie
wrote: .... text deleted Glasfaser says it applies to all Kestrels, type 401. The BGA doesn't say anything different. The copy of the AD 2011-0213, http://ad.easa.europa.eu/blob/easa_a...AD_2011-0213_1 referenced from the BGA website has additional notes about a few specific gliders identified by s/n over the range 86-125. .... text deleted Looking at the EASA AD cited, this looks very similar to the problem Schempp-Hirth experienced in the 1992-93 time frame with all of their ships with elevators driven by a pushrod in the vertical tail; Ventus, Nimbus, Janus, Discus, Mini-Nimbus. See: TM Nr. 349-16. http://www.schempp-hirth.com/fileadm...49-16-1592.pdf http://www.schempp-hirth.com/fileadm...49-16-1590.pdf In the SH case, the water apparently got into the vertical pushrod in a similar manner, though a small inspection hole in the pushrod, in this case through a leaking top sealing bellows. My recollection from that time is that most everyone replaced the vertical pushrod. I believe many SH ships of that era still bare the small hole in the left side of the vertical tail required to access the push rod securing nut, I know mine does. Again, based on the EASA note and the Schempp-Hirth experience, this should only effect ships with a top mounted elevator and a vertical pushrod in the tail (T-tail designs). Bob Ventus C |
#4
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Glasflugel AD
On Sat, 05 Nov 2011 22:02:21 -0500, Bob Gibbons wrote:
Again, based on the EASA note and the Schempp-Hirth experience, this should only effect ships with a top mounted elevator and a vertical pushrod in the tail (T-tail designs). Agreed, which makes its applicability to the one Std. Libelle, H.201b, s/n 169 particularly intriguing. -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
#5
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Glasflugel AD
On Nov 6, 1:51*pm, Martin Gregorie
wrote: On Sat, 05 Nov 2011 22:02:21 -0500, Bob Gibbons wrote: Again, based on the EASA note and the Schempp-Hirth experience, this should only effect ships with a top mounted elevator and a vertical pushrod in the tail (T-tail designs). Agreed, which makes its applicability to the one Std. Libelle, H.201b, s/n 169 particularly intriguing. -- martin@ * | Martin Gregorie gregorie. | Essex, UK org * * * | S/n 169 was a one-of-a-kind Libelle with T-tail, made for Eugen Aeberli, one of the three "fathers" of the Libelle (Hänle, Hütter, Aeberli). Changes compared to H201: - rounded fuselage beam - T-tail - 5 cm broader cockpit - contoured wing/fuselage transition - flat canopy, as for H301 "open class" Libelle. Water ballast and winglets added later. The glider was built in 1970 as a kind of prototype for the H 205/206. Flies in Ettenheim in Baden-Württemberg. Source: http://libelle.bugwiper..com/freaks.htm .. |
#6
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Glasflugel AD
I sent an e-mail to Glasfaser, as I also have a T59D. Here is the response I received:
____________________ Hello, from us the T 59 Kestrel is not affected. Our company is not the TC holder and all other infos you can find on our homepage www.streifly.de Best regards H. Streifeneder ____________________ Begs the question: who is the TC holder for Slingsby Kestrels? |
#7
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Glasflugel AD
At 12:37 07 November 2011, C-FFKQ 42 wrote:
___ Begs the question: who is the TC holder for Slingsby Kestrels? Slingsby are. |
#8
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Glasflugel AD
Thank you, Mark.
I have contacted Slingsby regarding the Kestrels and received the following reply: _______ At the moment we support the T59 series of gliders. Slingsby issued a TI on the same subject in 1987, I attach a .pdf file copy of TI 106/T59 for your reference. Note we do not supply spares but do sell drawings for any spare parts that customers may require. Best Regards Mike Rutter Airworthiness Coordinator ____________________ |
#9
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Glasflugel AD
On Mon, 07 Nov 2011 02:08:04 -0800, stephanevdv wrote:
S/n 169 was a one-of-a-kind Libelle with T-tail, made for Eugen Aeberli, one of the three "fathers" of the Libelle (Hänle, Hütter, Aeberli). Changes compared to H201: - rounded fuselage beam - T-tail - 5 cm broader cockpit - contoured wing/fuselage transition - flat canopy, as for H301 "open class" Libelle. Water ballast and winglets added later. The glider was built in 1970 as a kind of prototype for the H 205/206. Flies in Ettenheim in Baden-Württemberg. Source: http://libelle.bugwiper.com/freaks.htm . Thanks for the information. Were its airbrakes improved at all? I'd think that would be a good idea since it probably doesn't shed height in a slip as well without the teardrop boom cross section. -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
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