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#11
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"Mark Zivley" wrote in message ... That would be very unfortunate. It's pretty clear that SH has provided suitable places to drill holes on the premise that whatever boroscope used is fairly short. Clearly, the underlying objective is to make sure that the entire length of the upper spar flange (aft side) is visually inspected for any areas which didn't get enough resin and therefore might not be adequately bonded. If you can do that with a 25-30' long boroscope then you'd be complying with the intent of the tech note. If you call around to some companies specializing in NDT or perhaps who do boiler tube inspections, etc. you may find a suitable scope. It might be possible for a clever person to assemble a makeshift borescope with a "lipstick" TV camera fitted with a close-up lens and an ultra-bright LED for illumination. Just tape the camera to the end of a length of PVC water pipe and insert it into the wing through the root. The wires for the camera and LED would be neatly routed through the pipe. Wireless cameras might work too. I've used tiny CCTV cameras for the internal inspection of engines. Bill Daniels |
#12
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Anyone see a first person account of the accident? It sounds like it
might be some good reading. I wonder exactly how the pilots were able to regain control after the failure? I'm assuming the accident occurred in Germany. Is there a German equivalent to www.ntsb.gov where we can read about the accident report? -bob |
#13
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I spoke to a friend and Duo owner today who visited
Southern Sailplanes (the UK agents and repairers) yesterday where 3 Duos were examined using a small video camera on a long pole. Apparently the inspections could be done in 'about 10 minutes' per wing without inspection holes being drilled in the wing skins. He tells me that 2 Duos passed and one newish Duo failed. John Galloway |
#14
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If you go to the Shempp-Hirth web-site and look at the actual document:
Schempp-Hirth - Appendix to Technical Note No. 396-8/No. 890-3, http://www.schempp-hirth.com/tmdocs/396-8-489.pdf and look at page 2, it says: "REMARK: If a very long endoscope is available, which enables a safe check of the bonding, fewer inspection openings (see item 2) may be required." W.J. (Bill) Dean (U.K.). Remove "ic" to reply. "Mark Zivley" wrote in message ... Changing the subject just a tad. It's obvious that if one can locate a boroscope or similar device with a roughly 25 foot reach that it may be possible to inspect the vast majority of the wing from a single well placed hole. Those who have begun this process may be able to comment. Furthermore, if anyone finds a solution which approaches the above described level of elegance, please do NOT hesitate to post as much information as possible so that the others may benefit. i.e. make and model of the boroscope. Any particulars as to technique used for reaching the necessary corners inside the wing. If there are any issues with focal distance, etc. |
#15
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"Mark Stevens" wrote...
And of course although quick, a posting on RAS or an update on a manufacturers web site does not mean that everyone affected will find out... You shouldn't assume those were the only ways those affected were notified. I received a phone call from Rex Mayes at Williams Soaring Center a full 24 hours before anything appeared on RAS or the web site. Schempp-Hirth apparently asked him to contact all Duo owners on the west coast of the US. BTW, Rex now has an endoscope, and is in the midst of his first inspection... Marc |
#16
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Hi Bob,that would be www.bfu-web.de, which is the web page
of the 'investigation office for aviation in/accidents' in germany. But donīt expect any up-to-date information there, in that respect it is not comparable to the NTSB web page...Best regards,MarkusAt 15:12 05 August 2003, Bob Mowry wrote:Anyone see a first person account of the accident? It sounds like itmight be some good reading. I wonder exactly how the pilots were ableto regain control after the failure?I'm assuming the accident occurred in Germany. Is there a Germanequivalent to www.ntsb.gov where we can read about the accidentreport?-bob |
#17
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SSA's contact at the FAA's Small Airplane Directorate
reports receiving copies of the Duo Discus TN and German-issued AD yesterday. These documents and further information requested of LBA/Schempp Hirth will be reviewed prior to issuance of a US AD. No estimate on when a US AD may be issued, but an 'airworthiness concern sheet' (preliminary to actual AD issuance) is expected this week. In terms of what lies ahead, please note that when a US AD is issued on the basis of a foreign country's findings, it often adopts the same inspection procedures and remedies. (So owners who comply with the LBA-issued AD now stand a good chance of being in compliance with the US AD whenever it is issued.) Judy |
#18
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Marc,
Well put, but not my meaning.. I was not suggesting that RAS etc were the only ways, just that some people who owned and operated Duos might not have access, and that by implication it was important for the formal channels to operate as well.. Mark At 16:00 05 August 2003, Marc Ramsey wrote: 'Mark Stevens' wrote... And of course although quick, a posting on RAS or an update on a manufacturers web site does not mean that everyone affected will find out... You shouldn't assume those were the only ways those affected were notified. I received a phone call from Rex Mayes at Williams Soaring Center a full 24 hours before anything appeared on RAS or the web site. Schempp-Hirth apparently asked him to contact all Duo owners on the west coast of the US. BTW, Rex now has an endoscope, and is in the midst of his first inspection... Marc |
#19
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Bill,
Actually, for $80 U.S. you can get a black and white camera and for $170 you can get color. Just checked what they had at a local electonics store during lunch and the lens is adjustable to fit the distances that we'd see in this situation. Mark Bill Daniels wrote: "Mark Zivley" wrote in message ... That would be very unfortunate. It's pretty clear that SH has provided suitable places to drill holes on the premise that whatever boroscope used is fairly short. Clearly, the underlying objective is to make sure that the entire length of the upper spar flange (aft side) is visually inspected for any areas which didn't get enough resin and therefore might not be adequately bonded. If you can do that with a 25-30' long boroscope then you'd be complying with the intent of the tech note. If you call around to some companies specializing in NDT or perhaps who do boiler tube inspections, etc. you may find a suitable scope. It might be possible for a clever person to assemble a makeshift borescope with a "lipstick" TV camera fitted with a close-up lens and an ultra-bright LED for illumination. Just tape the camera to the end of a length of PVC water pipe and insert it into the wing through the root. The wires for the camera and LED would be neatly routed through the pipe. Wireless cameras might work too. I've used tiny CCTV cameras for the internal inspection of engines. Bill Daniels |
#20
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