Grob ASTIR CS 77 User Manual

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.
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Grob ASTIR CS 77 Specifications

General

Brand	Grob
Model	ASTIR CS 77
Category	Aircrafts
Language	English