---------------------------------------------------------- KIS-List Digest Archive --- Total Messages Posted Thu 11/27/14: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:01 PM - Re: TR-1 Incident down under (Scott Stearns) ________________________________ Message 1 _____________________________________ Time: 12:01:42 PM PST US Subject: Re: KIS-List: TR-1 Incident down under From: Scott Stearns I would recommend updating the gear installation using these gear blocks. The blocks allow the gear to flex without affecting the bolts and they allow the bolts to be properly preloaded. http://www.groveaircraft.com/radiusplates.html Scott > On Nov 26, 2014, at 6:38 AM, "mark_trickel" wrote: > > > KIS Incident Down Under > > With regret, I post this news from Australia - Michael Pattens TR-1 main gear collapsed during roll out after touchdown when one of the attach bolts let lose: > > Airframe event involving a Amateur Built Aircraft KIS TR-1, VH-AIG, Taree, Aerodrome, NSW on 9 September 1996. > Following an uneventful flight, the pilot reported that the aircraft touched down normally. After rolling about 80 m the right wing dropped and the pilot suspected a tire had failed. But about 50 m further on he heard pronounced scraping noises and the aircraft slewed right then left before finally coming to a halt about 10 m to the left of the runway. A subsequent inspection of the aircraft revealed that the fixed landing gear attachment bolts had failed at the countersunk heads. The failure faces contained rust deposits, indicating the bolts had been cracked for some time prior to the accident. The manufacturer has subsequently changed the design specification to fit standard flat head bolts in place of countersunk bolts. > > The complete report is located here: > http://www.atsb.gov.au/publications/investigation_reports/1996/aair/199602857.aspx > > I ran out to my hanger/shed, and checked mine (my TR-1C is a very early kit #23), it has the round Allen head bolts which are recessed into the attach bracket I will be checking them for any signs of corrosion or cracking, and I recommend you check yours too. Can anybody confirm that there was a change to a counter sunk flat head bolt??? Galin while you are down for repairs you may want to consider replacing these main gear bolts. > > Mark T. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=434702#434702 > > > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kis-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/KIS-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/kis-list Browse Digests http://www.matronics.com/digest/kis-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.