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Date: Wed, 28 Feb 2007 11:48:13 -0500
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Subject: RE: [LML] Re: 235/320/360 nose strut question
In-Reply-To: <list-1873854@logan.com>
Thread-Topic: [LML] Re: 235/320/360 nose strut question
Thread-Index: AcdbSrFVLagSb4qcQS2xEr4YWr2RhAAANOBw
References: <list-1873854@logan.com>
From: "Zavatson, Christopher J \(US SSA\)" <Christopher.Zavatson@baesystems.com>

Randy,
Not that this will help your current nose strut situation, but for
anyone with virgin parts it may be useful.  Early on I switched out all
bolts that are used as hinges in aluminum linkages with close tolerance
bolts(AN173-AN183 series).  These are held to right around .001
undersize.  Your typical 1/4" bolt will run .002-.003 and can be as bad
as .004 undersize. =20
Switching bolts plus annual disassembly, cleaning and greasing has
prevented propagation of wear.  The bolt that attaches to the nose gear
gets replaced every few years.  The metal tangs will wear groves in the
bolt over time if left unattended, even if a close tolerance bolt is
used - more surface area is needed on those tangs.  By periodically
replacing this bolt, the two pieces will tend not to chew each other up.
This is not an ideal solution but it has worked well for nine years and
1000+ hours.  Hopefully your excessive wear in only 100 hours is an
anomaly.  A redesign of this joint would certainly ease the maintenance
burden and could guarantee a better fit right from the start.  Keep us
posted on your findings.
Chris


Chris Zavatson
N91CZ
360std
www.N91CZ.com