Document: SLSA-MIP-5-4-0-US
Date of Issue: 05/2016
Revision: -
15-21
15.8.3
Bolt joint securing by cotter pin
Securing by cotter pin is used for independent bolt joints where securing by locking wire could
not be used. It is used for securing castle nuts. Cotter pin removal is very easy: by means of
a flat screwdriver straighten up the bent ends of the cotter pin and take out the cotter pin of
the hole by means of pliers.
CAUTION
When securing joints always use new cotter pins.
Shift the new cotter into the hole in the bolt and bent the cotter pin ends according to Fig.
15-8.
Fig. 15-8
Securing the castle nut by using the cotter pin
15.9
Bonding repair
15.9.1
General
In order to keep the set down values of the transition resistances between some structural
parts of the BRISTELL S-LSA airplane structure, the bonding (conductive interconnection) is
installed between all important parts of the fuselage structure.
15.9.2
Removal / Installation
Before installing the bonding remove the paint coat which protects the joint. Principles for
repeated installation of the bonding:
Carefully clean the whole bonding including the washers, bolts and nuts from all
impurities, if necessary degrease the contacting surfaces on the connecting material.
Carefully check whether wires of bonding band are not torn off. Change the damaged
band.
Carefully clean and degrease contacting surfaces on the airplane structure. Clean
corroded surfaces with emery paper to the metallic luster.
CAUTION
If a new part was installed into the airplane, its surface is provided by non-conductive surface
protection (for example anodizing), this surface protection must be removed from the area of
bonding installation.
The threaded joints, which fulfill a function of bonding cannot be lubricated.
On the same areas of the airplane structure install the same type of bonding which you
removed.
After repeated bonding installation coat the remaining metallically clean surface of the
contact area, as well as protruding heads of bolts and nuts with protective paint.
Summary of Contents for S-LSA
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