Pipistrel Sinus 503 User Manual

76
SINUS motorglider
www.pipistrel.si
REV. 0
77
SINUS motorglider
www.pipistrel.si
REV. 0
Handling and maintenance
Adjustment of tail wheel steering clutch stiness
To adjust the stiness of tail wheel stearing clutch you need two allen keys (a.k.a. hex-wrench, inbus-
key). On top of the wheel fork you will notice a ring with two tubes welded to each side with hex-
bolts inside. First disconnect the springs at the tubes, then stick an allen key into each of these tubes
and tighten or loosen the screw inside. Make sure, thightening or loosing, you apply equal number
of screw rotations at both sides. To check if the steering clutch is sti enough, lift the tail and rotate
the fork left and right. At the end, reattach both springs to the tubes again.
(see Service manual for photos)
Special check-ups
After having exceeded VNE or landed in a rough manner:
check the undercarriage, fuselage & wing surfaces and main spars for abnormalities. It is highly
recommended to have the aircraft veried for airworthiness by authorised service personnel.
Draining and refuelling
Whenever draining or refuelling make sure master switch is set to OFF (key in full left position).
Draining the fuel system
The gascolator is located beneath the bottom engine cover on the left hand side of the fuselage.
To drain the fuel system, open the drain valve on the gascolator. Drain no more than a couple of
spoonfuls of fuel. Try to prevent ground pollution by intercepting the fuel with a canister.
To close the valve simply turn it in the opposite direction. Do not use force or special tools!
CAUTION! Always drain the fuel system before you have moved the aircraft from a standstill to
prevent mixing of the fuel and eventual water or particles.
Refuelling
CAUTION! Before refuelling it is necessary to ground the aircraft!
Refuelling can be done by pouring fuel through the reservoir openings on top of the wings or by us-
ing an electrical fuel pump.
Refuelling using the electrical fuel pump:
First make sure the fuel hoses are connected to wing connectors and that both fuel valves are open.
Connect one end of the fuel pump to the valve on behind the main wheel mounting struts or to the
valve beneath the bottom engine cover (this depends on the version of Sinus ultralight motorglider).
Submerge the other end of the fuel pump, which has a lter attached, into the fuel canister.
Engage the fuel pump by ipping the switch on the instrument panel.
After refuelling it is recommended to eliminate eventual air pockets from inside the fuel system. To
do that, drain some fuel with both fuel valves fully open. Also, leave the engine running at idle pow-
er for a couple of minutes prior to taking-o.

Pipistrel Sinus 503 Specifications

General

Brand	Pipistrel
Model	Sinus 503
Category	Aircrafts
Language	English