TM
55-1730-229-12
AC
320A0-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
LEGEND FOR FIGURE 4-45:
1.
FUEL FILL
19.
WIRING TO ECU
2.
STRAINER
20.
FUEL CONTROL UNIT (FCU)
3.
VENT HOSE FITTING
21.
METERING VALVE
4.
FUEL TANK
22.
ORIFICE
5.
FUEL LEVEL SENSOR
23.
ULTIMATE RELIEF VALVE
6.
WIRING TO CONTROL PANEL
24.
DIFFERENTIAL PRESSURE
7.
LOW FUEL SENSOR
25.
METERED FUEL OUTLET
8.
DRAIN
26.
FUEL SOLENOID, SHUTDOWN
9.
AUXILIARY FUEL FILTER
27.
WIRING TO ECU
10.
AUXILIARY FUEL PUMP
28.
FUEL DIVIDER AND FUEL NOZZLE
11.
WIRING TO CONTROL PANEL
29.
PRIMARY FLOW
12.
PRESSURE SENSOR
30.
SECONDARY FLOW
13.
FILTER BYPASS VALVE
31.
COMPRESSOR AIR
14.
INLET FILTER
32.
IGNITER PLUG
15.
OIL PUMP ASSEMBLY
33.
COMBUSTOR
16.
HIGH PRESSURE PUMP
34.
ENGINE
17.
STRAINER ELEMENT
35.
FOUR-WAY VALVE
18.
TORQUE MOTOR
(4) Automatic shutdown by electro-
(3) Inspect fuel pump fittings and
nic control unit (ECU) for: overspeed,
lines for leaks. If tightening fitting
high exhaust gas temperature (EGT), low
does not stop leak, replace fitting or
oil pressure,
high oil temperature,
line.
overcurrent (related to solenoid, igni-
(4) DELETED.
coil, or generator interlock circuits).
b.
Remove.
(See figure 4-46.)
e. Fuel Nozzle.
The fuel nozzle
(28) is mounted on the combustion cham-
(1) Set four-way valve (1) to OFF.
Fuel delivered to the nozzle
ber cap.
assembly is sprayed into the combustion
chamber and mixes with compressor dis-
charge air. The fuel-air mixture is
ignited by the igniter plug (32) and
Aviation fuel is flammable and
burns, creating hot combustion gasses
irritant to skin, eyes and respi-
required to drive the turbine rotor.
ratory tract. Avoid repeated or
prolonged skin contact. Handle
only in well ventilated areas.
Keep away from sparks, open flames
NOTE
or other sources of ignition.
See table 4-2, Malfunction 22
(2) Open drain valve (1, figure
(step 2) for test.
4-47). Catch draining fuel in a suitable
container.
a. Inspect.
(See figure 4-46.)
(3) Disconnect fuel tube (2, fig-
(1) DELETED.
ure 4-46) from fuel pump (3) inlet and
fuel tube (4) from fuel pump outlet.
(2) Inspect fuel pump for dents,
cracks, or other damage. No dents or
(4) Tag two white leads of cable
cracks are allowed.
(5) and cut at crimp connection.
Change 2
