---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Fri 03/28/08: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:10 AM - Re: Seems to me we need to be careful.... (salkeld) 2. 09:41 AM - Re: Nanchang Left Main Gear Collapse -- Import (V. Walker) 3. 11:05 AM - gear problems (doug sapp) 4. 05:05 PM - Re:gear problems (Cpayne) 5. 05:06 PM - Re:gear problems (Cpayne) ________________________________ Message 1 _____________________________________ Time: 12:10:01 AM PST US Subject: Yak-List: Re: Seems to me we need to be careful.... From: "salkeld" Nice to be concerned, But there's nothing wrong with a "mod" done properly, to a set standard. As far as safety is concerned, keeping the FOD out of the aircraft & regular, good maintenance will go a long way... (amongst other things) Matt Read this topic online here: http://forums.matronics.com/viewtopic.php?p=173216#173216 ________________________________ Message 2 _____________________________________ Time: 09:41:22 AM PST US From: "V. Walker" Subject: Re: Yak-List: Nanchang Left Main Gear Collapse -- Import Blitz, Sorry to hear about the gear colllapse, but happy it didn't occur on T/O or landing. I found something similar with a worn 'over center" part last Fall. During the December conditional inspection we found quite a few gear parts that were just worn and needed to be replaced. Several others would "probably" make it another year before replacement. Fortunately, Doug Sapp had a new set of gear available that I could afford for the same price as replacing the old parts with an exchange. I dusted the wallet off and did it. Now I'm really glad I did. Point being, the fact that we all work together to help each other see alternative solutions is one of the YAK communities greatest strengths. Also, the gear retraction used to be rather "violent" (it scared the mechanic.) Thanks to the YAK resources of Doug and Dennis, he was reassured that this was due to the desire of some airshow pilots to remove the pressure relief ports for a snappier gear retraction which just looks better. (You guys know this, but I didn't, and there was no way we would have descerned this from the Chinese manuals without spending hours guessing.) As financially painful as owning any aircraft can be, all I can say is that people outside of the YAK community are envious of our relatively low costs, fun factor, resources and camaradie. "alis grave nil", (Nothing is heavy to those who have wings) Valkyrie ________________________________ Message 3 _____________________________________ Time: 11:05:27 AM PST US From: "doug sapp" Subject: Yak-List: gear problems Gang, I have had several calls from CJ drivers who don't fully undertand just which part failed in Blitz's aircraft, so here is the chapter and verse: It is shown in IPB vol #1, the drawing is on page167, fig 4-21. The part which broke is item #1, p/n H2-4120-03. (-03R/H and -03L/H). When checking this part on your aircraft make sure you check to see that the bearings are tight, and that the gear actuator conforms with the setting called out in the manual. While we do not know for sure what caused this failure, sloppy bearings and/or a incorrectly adjusted actuator ram just might cause such a failure, Hope this helps clear things up. -- Always Yakin, Doug Sapp Phone 509-826-4610 Fax 509-826-3644 ________________________________ Message 4 _____________________________________ Time: 05:05:43 PM PST US From: Cpayne Subject: Yak-List: Re:gear problems First mechanical gear collapse I have seen on a CJ in 13 years not attriuted to "dummy damage". Could hydrogen embrittlement have played a role as this is an old-fashioned chromed part? Craig Payne ________________________________ Message 5 _____________________________________ Time: 05:06:07 PM PST US From: Cpayne Subject: Yak-List: Re:gear problems First mechanical gear collapse I have seen on a CJ in 13 years not attributed to "dummy damage". Could hydrogen embrittlement have played a role as this is an old-fashioned chromed part? Craig Payne ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.