Yak 18T Flight Operations Manual
Page 26 of 82
Disclaimer: This manual is to be used as a reference only, it is based on translated Yak 18T Flight Operations
Manuals and has not been approved by the Yakovlev Design Bureau or any other authority.
Check the engine controls –
103. CHECK the motion of the thrust lever from idle to fully open
104. CHECK the action of the pitch control lever
105. CHECK that the carburettor heat control lever can be easily moved (after
checking stop heating by placing the lever fully upwards)
106. CHECK the opening and closing of the cowling gills and radiator shutters,
ENSURE that the control wiring does not jam and that the cowling gills and
radiator shutters are closed and open when you expect them to be – CHECK
VISUALLY: do not expect that everything is fine just because the control
levers feel normal
. If the gills are not opening and closing freely, then it is
possible to loosen the equipment by squirting aviation lubricant in the
cowling joints on the front of the cowling, being careful not to disconnect the
small springs connected to some of the gills
107. ENSURE that the FUEL SHUT-OFF VALVE is pushed as far forward as it
will go. i.e. fuel is not cut off
108. Now OPEN the air system valve by turning it fully to the left and –
a. CHECK air pressure in the main and emergency cylinders which must be 50
±5 kgf/m²
b. PROPER functioning of the landing split flap-operating mechanism (its
extension and retraction) and CHECK the proper state of the warning light.
To do this, move the flap lever to the position RETRACT (counter pressure is
to be created) and then to the EXTEND position and control the flap
extension by means of a red indicator FLAP EXTENSION on the panel which
will LIGHT UP at this moment. Then RETRACT the flap, to do it SET the
flap lever to the position RETRACT and on making sure it has been retracted
from a red indicator light FLAP EXTENSION which will go OUT on the
panel, place the flap lever in the NEUTRAL position.
c. NOTE: if the air pressure is low, you may omit this step for now, until the
engine is operational and the air pressure is being recharged
109. CHECK air-tightness of the braking system, fully apply the brakes and
ENSURE that no noise or hissing of air can be heard. Leave the brakes in
the ON position and continue the checks in the next section 5.1 Start
Preparation
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