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From: RWolf99@aol.com
Message-ID: <0.5262a112.254c7e51@aol.com>
Date: Sat, 30 Oct 1999 13:01:05 EDT
Subject: Engine Mount Fit to Firewall (LNC2)
To: lancair.list@olsusa.com
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In a message dated 10/29/99 9:41:30 PM, you wrote:

<<The firewall of my kit
wasn't totally flat so I bad to make it be flat.  It was approved by
Lancair. In my case there was really big gaps between mount and firewall,
up to quarter inch. >>

I had this same problem to a lesser degree, but I thought it was the engine 
mount that was out-of-plane rather than a warped firewall.  Two of my engine 
mount pads would not lay flat on the firewall.  Neither would they lay flat 
when on a tabletop, which is why I say the problem is with the engine mount 
rather than the firewall.  However, the gap was coincidentally almost exactly 
the thickness of an AN970 area washer.  Place an area washer between the 
offending pads and the firewall and, voila, the problem is solved.  When I 
installed the fiberfrax, I glued the washers to the 
fiberglass-covered-plywood firewall with red RTV.  

This means that two engine mount pads have an extra area washer, since the 
permanent installation of the engine mount already includes trimming away the 
fiberfrax under the engine mount pad and placing an area washer there. (or 
was it two?  I forgot.  The manual was very clear here and I did what it 
said.)

- Rob Wolf
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