Washers or not?

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Posts: 167
Joined: Thu Oct 08, 2009 13:32
Location: Corona CA

Washers or not?

Post by Aerco » Sat May 11, 2013 16:26

Pulling apart my L3B wings, I noticed that there are no washers under bolt heads or nuts on all the main fittings; wing root plates, main strut fittings etc. Was this normal practice? I'm pretty sure these fittings have never been off the airplane, so I assume it was done that way at the factory. Where there are no fittings, they did of course use a flat AN970 washer.

I am about to buy new hardware, and I don't want to end up having to pull out all my new bolts because an IA says I should have washers under there.


Paul Agaliotis
Posts: 2485
Joined: Wed Dec 08, 2004 18:49
Location: San Martin, California

Re: Washers or not?

Post by Paul Agaliotis » Mon May 13, 2013 18:34

If there is no reason for the washer I would leave it off. Generally The washer is required under the side that gets turned. Most of the manufacturers eliminate as many parts as they can. So, if a washer under the head is not required it was not used.
Mailing Adress : Paul Agaliotis 2060 E. San Martin, San Martin,Calif. 95046

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