Main pins
and
bearing surfaces.
The pins and bearing surfaces of the tail and wing attachments should
be
cleaned and
greased before rigging.
Major repairs
Repairs which exceed the remit of normal maintenance and servicing should
be
carried
out
by
the manufacturer:- Burkhart Grob Flugzeugbau, 8939 Mattsies, Flugplatz
Mindelheim-Mattsies.
Details are
in
the workshop manual for the ASTIR
CS
glider, August 1975.
New gel coat
It
is
essential that all surfaces exposed to sunlight are covered with a white gel coat
layer.
After repairs and/or a
new
gel coating
After repairs and re-gelling the empty weight and centre of gravity position must
be
determined.
Hotellier quick release control connectors
The maintenance schedule of the Hotellier connectors must
be
adhered to
at
each
annual check and at every 500 hours. They are at the control connections for aileron
and airbrakes at the fuselage/wing junction and for the elevator at the tail unit junction.
To determine the amount of wear, measure the diameter of the
ball
with a micrometer
at
several places. The differences
in
the measured diameters may not exceed 0.1
mm
;
i.e. the connecting
balls must
be
spherical. If larger differences are detected, the ball
joints and associated connectors must
be
replaced.
Before each assembly, the ball joints and connectors must
be
cleaned and greased.
The connectors can
be
double secured
by
a spring cotter
pin
(safety
pin
or locking
wire) inserted through a
hole
in
the wedge slide lock of the connector.
Part
No
. 500
30771
from
A.
Wurth, 7118
KOnzelsau
(also available from Burkhart
Grob).
Additional Information on Hotellier Ball and Swivel Joints
Prior to rigging everyone should
be
familiar with the functioning of the Hotellier ball and
swivel joints.
The
swivel must
be
slid
completely over the ball with the lock plate pressed down.
During
locking the lock plate moves back slightly so that
in
a correct joint the hole
on
the narrow edge of the lock plate becomes visible.
The safety
pin
is
to
be
inserted
in
this hole thus securing the
ball
and swivel joint.
HOL!
'"'
---rn
I
~Wl\/El
JOINT
Warning: Unsecured ball and
swivel joints may open
automatically
in
flight.
22