Jeff,
Exactly the same kept happening to me. The airbox tubes simply aren't strong
enough, and you can't really tell when they are collapsing.
I have a very simple fix: get a piece of 1 7/8th inch alu tube, cut off two
short pieces and jam them into the inside of the tubes. ACS will sell you
12" for a few dollars.
To ensure that the airbox never comes off, I also jammed a piece of blue
foam between the box and the firewall.
Hope that makes sense.
Karl
>From: JEFF ROBERTS <jeff@rmmm.net>
>Reply-To: europa-list@matronics.com
>To: europa-list@matronics.com
>Subject: Europa-List: Air Box Falling Off
>Date: Tue, 8 Aug 2006 12:16:19 -0500
>
>
>Hi All,
>I am currently adding some strength with 3 layers of bid around the tubes
>that the carbs connect to on the air box. They have started to collapse
>from the pressure of the clamps. I have had the whole box come off from
>the 2 rubber hoses 3 times. Yes I have the brace in the back going to the
>motor mount. I even safety wired it to the carbs and one of the wires
>eventually broke. It is the standard NACA on the top of the cowl with the
>912-S. Has anyone else experienced this and is there another way of
>connecting it to the carbs or reinforcing the connection to the carbs?
>I believe it may be from the pressure of the ram air coming in from the
>over size NACA on top. I have all that air going into a plenum thats
>mounted to the top of the air box. I was thinking of making the plenum
>opening smaller so some of the air just goes into the engine area and less
>pressure is placed on the top of the box.
>All Ideas are welcome as I am out of them. Thanks in advance for any help!
>Jeff
>A258 Flying off the 40
>
>
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