[Top] [All Lists]

Re: [TowerTalk] G-1000DXA failure with lower mast clamp

Subject: Re: [TowerTalk] G-1000DXA failure with lower mast clamp
From: Barry N1EU <>
Date: Tue, 27 Dec 2011 14:19:16 +0000
List-post: <">>
I should have mentioned that in the photo, the right two shots of the
mast clamp show zero damage to the mast clamp itself.  The left shot
shows the one damaged bolt hole on the rotor itself.

On Tue, Dec 27, 2011 at 2:16 PM, Barry N1EU <> wrote:
> My G-1000DXA rotor came completely unhinged from its GC-038 lower mast
> clamp and left my 3-el Steppir and attached rotor dangling from the
> attached cables.  It appears that the attachment bolts on the bottom
> of the rotor came loose and fell out.  Please see photo at
> The cast aluminum fractured at one of the four threaded holes on the
> rotor bottom.  At first I thought this might be the cause of failure
> but on further thought, I would guess that the other 3 bolts came
> loose and fell away and this fourth bolt was the last to stay attached
> and this caused the aluminum fracture.  Any comments on whether this
> seems correct?
> I'd also appreciate comments on why this happened in the first place
> and how to prevent a repeat.  The rotor was assembled to factory
> instructions with lock washers.  Instead of using anti-seize on those
> four bolts, perhaps what is really needed is loctite?
> Does the motor casing need replacement and if so, is this a fairly
> easy job to do myself?  There's still about half the threads on the
> one hole that suffered the fracture.
> Thanks & Happy Holidays,
> Barry N1EU

TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>