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Ernest Christley wrote:
> Michael Horowitz wrote:
>
>> the punch test on fabric... are the results a go/no-go decision, or
>> can an A&P make a determination as to how long the covering will last
>> based on the test? - Mike
>
>
> Mike, I have not read RAH in a few days, and I am just now catching up,
> but your question has drawn a emphatic response from Jim Weir, R.S.
> Hoover, AND Cy Galley that you should replace the fabric.
>
> I have been reading this group for a while now, and think I've learned
> who knows what they're talking about and who might blow a little smoke
> now and then. I'd have to say that this is a unique situation.
> Dude, if you value your hide, you better ground that plane until the
> fabric is replaced no matter how much it cost.
>
Just because the fabric is 25 years old does not mean that it needs
replacement.
It means that it needs a good close inspection, which includes punch
testing.
Is the dope cracked anywhere? Anywhere there is a crack there could be
UV damage.
Check for ringworm, pretty much the same thing as cracking. Get inside
it on a bright day and see where the light comes through the fabric.
Look for loose spots where the glue may have come loose. Squeeze the
training edges of the control surfaces and see if there is any
crunchyness. That will indicate corrosion.
Discoloration of the dope along metal parts will indicate rust.
If it all seems good, buy it with the understanding that it may need
recovering in the next few years and the price should reflect that.
But like all old aircraft, it's not so much age but condition.
Dave
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Re: Punch test?
