T
T
e
e
c
c
h
h
n
n
i
i
c
c
a
a
l
l
D
D
e
e
s
s
c
c
r
r
i
i
p
p
t
t
i
i
o
o
n
n
,
,
O
O
p
p
e
e
r
r
a
a
t
t
i
i
n
n
g
g
,
,
M
M
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
a
a
n
n
d
d
R
R
e
e
p
p
a
a
i
i
r
r
M
M
a
a
n
n
u
u
a
a
l
l
Document No.: 304S/MM
Date of Issue:
08/14
3-2
H
P
H
Ltd.
3.2 Regular Maintenance
Within the framework of the yearly inspection, the following maintenance should
be carried out:
The controls are accessible as follows:
1) Flaperon control system within the wing is accessible through pushrod
openings in the root rib and through the flaperon drive opening when the
ailerons drive caps are dismantled.
2) Air brake control system within the wing is accessible through the root rib
and through the airbrakes slot when the airbrakes are opened.
3) Control systems in the fuselage are accessible after removal of the wheel
box cover behind the back-rest, the removal of the four inspection covers in
the wheel box, the upper wheel box cover, and after removing the seat tray.
4) Elevator drive after removal of the tailplane.
5) Rudder drive after removal of the rudder.
After cleaning the whole aircraft, proceed as follows:
Check CFRP outside surface condition for holes, tears, cracks, paint cracks,
indents, and delamination. If the outer layers of the sandwich are damaged, the
inner layers should also be checked. Seek the help of an experienced person.
Check all metal parts for corrosion, and if necessary, clean up and preserve
again (steel fittings, pushrods and levers should be primed with Zincromite and
conserved with Nitro-lacquer).
If control runs with excessive friction, the bearings and joints should be cleaned
and lubricated. Lubricate all accessible control circuits (bearings with a sealed
grease filling do not require any service).
Sailplane may be lubricated with acid-free grease and oil customary in trade.
The permissible friction in the elevator controls can be checked in flight.
From a trimmed speed of 65kts,(75mph, 120km/h), and when the control stick is
gently released, the sailplane should return to ± 8 kts,(± 9 mph, ± 15km/h) of the
original trimmed speed.
Bearings and joints with excessive radial play should be replaced. The
automatic "link-up" connection for ailerons and airbrakes between wing and
fuselage can be adjusted free of play on the adjusting bolts of the four socket
fittings on the fuselage.
The play in the controls and airbrake drive should be checked according to 3.4 .
The play in the wing and tailplane should be checked according to 3.5.
All fittings, which are attached to CFRP, should be checked for firm attachment.
Check the condition of the CFRP near the fittings for cracks and white areas of
delamination.
