I installed the Aviation Research Stainless Steel Battery Box modification as
per the STC. After that was accomplished, I modified the stainless steel
firewall plate that came with the kit so that it is fastened with screws instead
of rivets. It is now removable.
I tried it out and it took me twenty-four minutes to
disconnect and remove the battery, remove the battery box, and remove the
firewall panel. Not bad as far as I am concerned.
It gives me a hole in the firewall roughly the same size as
the old battery access door.. Combine that with the great access I get from the
easily removed panel mounted components and it is the easiest to work on panel I
As I am sure you are all aware, it is NOT legal to install an
STC in any way other than as described in the STC. However, after the STC is
installed in accordance with the STC, alterations can be made that are in
accordance with AC 43.13-1B.
You realize, of course, that I did install it strictly in
accordance with the STC and then made the modification that would allow it to be
easily removed. To do otherwise would have been illegal.
The idea was to provide access through the firewall on the
right side in a manner similar to what is available via the kidney panel on the
The kit from Aviation Research is big enough to allow plenty
of room around the edges for adequate seals to be used. I used the same sealing
materials as were used on the factory Kidney panel. I also added some filler
plates to the old firewall to make better areas for the seals to hit.
I believe that Bob B. may have made a similar modification to
his H35. Since I was installing the Auracle at the same time, I was able to
eliminate many of the wires and plugs that originally had to go through the
firewall, but now go to the Auracle box which is mounted on the kidney panel.
Getting rid of that ancient monster Cannon plug and many other
wires made the whole deal a lot cleaner. All of that was in accordance with the
Without the Auracle, the modification to the battery box would
not have worked as nicely.