TECHNICAL DESCRIPTION, OPERATING, MAINTENANCE AND REPAIR MANUAL
I winter operation is advisable to disconnect the ventilation intake hose (VIH) due the
better performance of heating system. After disconnecting the ventilation intake hose
close the socket for the hose. Othervise the ram air will be loosen through this opening.
3.14.3 Operation
Preflight inspection
In addition to the Pre-flight inspection events in Aeroplane Flight Manual ( AFM ) , the
following would be done:
• Throw down or ice from aeroplane surfaces
• Check control surfaces for free movement and cleanness of slots of control surfaces
and flaps
• Check cleanness and passage of the fuel tank venting before each flight
• Check fuel system ( fuel filter ) for frail, if found than empty the fuel tank and refill
with new one
• Check fuel for water prior filling
• Drain fuel tank, deflate a small quantity of a fuel.
• If the aeroplane is equipped with a tricycle type of fixed undercarriage, for the winter
operation on the frozen or harden surface of the runway is recommended to remove
the spats from the wheels due to their damages.
Pre-heating engine and oil
There is possible to start an engine without need of pre-heating if outside temperature is
not below + 5°C. It is recommended to pre-heat the engine and oil if temperature falls
below + 5°C. Use suitable air heater or a dryer.
WARNING
Never use open fire to pre-heat an engine.
Blow hot air from the front into the hole around the propeller hub . Temperature of hot
air should not exceed 100°C. Pre-heat until cylinder head temperature and oil
temperature exceed + 20°C.
Date: 05.12.2007 Rev. 2 WT-9 Dynamic Section 3 Page 3 - 23
VIH
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