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1. 04:50 PM - Re: TR-1 Incident down under (Mike Pienaar)
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Subject: | Re: TR-1 Incident down under |
Hi Scott
Would you recommend these gear installation blocks for the TR4 as well?
Thanks
Mike
----- Original Message -----
From: "Scott Stearns" <sstearns2@yahoo.com>
Sent: Thursday, November 27, 2014 11:58 AM
Subject: Re: KIS-List: 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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