Yak 18T Flight Operations Manual
Page 40 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.
• INCREASE the engine speed rpm to the specified one
• INCREASE the boost pressure
To AVOID oil thickening in the propeller hub cylinder during prolonged flight in steady
conditions with low ambient air temperatures, it is necessary to shift the propeller pitch from
a fine pitch to a coarse one at regular intervals (i.e. every 25-30 minutes) using the propeller
pitch lever, changing the engine rpm within the 55%-67% limits.
One can monitor the correct operation of the Generator by checking the GENERATURE
FAILURE red light on the annunciator panel or by using the voltage level tester on the
voltmeter gauge.
7.7. Chips in Oil
In flight, if the CHIPS IN OIL red light illuminates on the annunciator panel, the pilot is
obliged to END THE FLIGHT IMMEDIATELY and to INTENSIFY control of the aircraft.
SPECIAL attention should be paid to the oil pressure and temperature at the engine inlet. If
the pressure drops or the oil temperature rises, INFORM ATC about it and land at the
nearest aerodrome or on the nearest emergency landing ground.
It is PROHIBITED
to perform any flight if the CHIPS IN ENGINE red light is illuminated
before take-off. This problem must be eliminated before flight.
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