I agree, Joe, but I don't think that this is a likely risk. In the case 
of aircraft wiring, the VERY thin polyimide insulation cracking under 
bending stress is one thing; the 1.6 mm thick rigid polyimide laminate 
in an inertial guidance system is not likely to be considered as being 
even a close cousin. AFAIK, the UK DEF STAN forbidding polyimide 
insulated wiring specifies clearly that it is this and this alone.

Brian

Joe Fjelstad wrote:
> Thanks for the history and links. Those are some unnerving  stories to be 
> sure, however I would like to make sure that the  baby does not get tossed out 
> with the bath water. 
>  
> There are many different types of polyimide like there are many different  
> types of epoxies and they have very different properties. 
>  
> We have all seen how metallic lead in electronic solder was  vilified based 
> on the actions of lead salts in paint and lead in gasoline.  It is too easy to 
> begin to slide down that slope if it gets latched onto by  marketing types.  
>  
> I would hate to see polyimde get a similar broad brush treatment  metallic 
> lead has received.
>  
> Best, 
> Joe   
> 
> 
> 
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