You might want to have your AI call your FSDO. They may consider this a minor 
alteration and not require a 337.

 

Bill
 


To: [email protected]
From: [email protected]
Date: Sun, 5 Jul 2009 22:25:52 +0000
Subject: [ercoupe-tech] brake line modification 337







I am in the process of writing up a 337 for the following modification to the 
main landing gear brake lines:

The existing aluminum brake line tubing is attached to the landing gear leg by 
means of a metal bracket. A few inches below this attachment point is a 
coupling where the flexible hose is attached to flex every time the gear goes 
up and down.
In reality, a good portion of the flexing is also done by the aluminum tubing 
causing the bracket to cut into the aluminum line and cause a leak of brake 
fluid. This leak causes the brakes to fail.

The modification consists in making an angle with a hole in it that is attached 
to the leg. A bulkhead fitting is assembled through the hole with the aluminum 
tubing attached to the top and the flex hose to the bottom. With this, the 
flexing is done by the hose only and the tubing is held rigid by the angle.

I have a great looking diagram that explains all this clearly but have not 
discovered how to attach it here.

All comments are welcome.

Alan Fairclough
N87333
N94694









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