Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Rev. No:
Rev. Date:
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-71-02
3
06.11.2013
5
46
1
25.08.2014
The coolant temperature is measured in the intake manifold,
giving the corresponding temperature value to the FADEC and
CED 125. The maximum permitted pressure in the cooling
system is limited to 1700 mbar by the cap of the expansion tank.
The cooling system contains approx. 10 liters coolant.
Propeller Drive System
The drive for the propeller is via a gear set. The propeller shaft
speed is 2300 rpm during start conditions and continues fly
conditions. The die cast housing is mounted directly to the
crankcase and incorporates internal oil paths to lubricate the
gears and constant speed propeller drive.
Governor System
The prop-pitch-control system is integrated into the FADEC. The
gear oil is sucked off at the lower side of the gear and is brought
to the pressure control and control unit by a gear pump. The
system pressure regulator provides a constant system pressure
of 20 bar (290 psi). The control unit controls the oil flow to the
propeller hub with a pulse valve, the hub controls the propeller
pitch adjustment.
Auxiliary System
The vacuum pump is direct driven by camshaft and provides the
necessary vacuum for the navigation instruments.
Содержание Cessna 172
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