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1. 12:01 PM - Re: TR-1 Incident down under (Scott Stearns)
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Subject: | Re: TR-1 Incident down under |
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" <marktrickel@gmail.com> 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
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