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-28-02
3
06.11.2013
1
20
1
25.08.2014
28
FUEL
28.00
GENERAL
DESCRIPTION
The fuel system of the TAE 125-02-99 installation includes the
original standard or long-range tanks of the Cessna 172.
Additional sensors for Fuel Temperature and "Low Level"
Warning (if not installed already) are installed in the fuel tanks.
The fuel flows out of the tanks to the Fuel Selector Valve.
The electrically driven Fuel Pump supports the fuel flow to the
Filter Module if required. Upstream to the Fuel Filter Module a
thermostat-controlled Fuel Pre-heater is installed. Then, the
engine-driven feed pump and the high-pressure pump supplies
the rail, from where the fuel is injected into the cylinders
depending upon the position of the thrust lever and regulation by
the FADEC.
In TAE 125-02-99 installations surplus fuel flows to the filter
module and then through the fuel selector valve back into the pre-
selected tank. A thermostat switch in the filter module controls
the heat exchange between the fuel feed and return.
In TAE 125-02-114 installations surplus fuel flows to the fuel
cooler, flows to the filter module and then through the fuel
selector valve back into the pre-selected tank, if BOTH is
selected the fuel returns to both tanks.
The fuel cooler receives its cooling air through an inlet in the air
duct to the heating radiator. This inlet is closed with a baffle,
which must be removed at high outside air temperatures (OAT
higher than 20°C [68°F].
WARNING:
Any modification to the fuel system (e.g. installation of ferry tank
installation), must be approved by Technify Motors GmbH. Any
un-approved modification may lead to an unsafe situation.
Summary of Contents for Cessna 172
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