T-45A UJPT, E2-C2, ADV, & IUT Eng-02
Engine
D.
Engine starting system: engine is started (on
Sg 2, fr 9
ground or by assisted relight in flight) via GTS
(10 Overlays)
and ATS
TO ATMOSPHERE
ADVISORY LIGHTS
WING TANK
BOOST PUMP
ROTATION
GTS
FUEL
SHUTOFF
GTSOIL
FUELVENT
TANK
ROTATION
GTS
VALVE
TANK
LOWPRESSURE
FILTER
SHUTOFF VALVE
ECA
CHECK VALVE
FUEL/OIL
100 RPM N 1
FUEL SPILL
1.
No more than three (3) successive engine
PUMP
VALVE
DIST.
UNIT
START
ALTITUDE
CONTROL
UNIT
SWITCH
start attempts may be performed.
OIL PRESSURE SWITCH
UNIT
ENGINE
SWITCH
DC STARTER
GTS
Following the third start attempt, a 30-
MOTOR
SPEED PROBE
ENGINE
GTS
GTS
SWITCH
START
START
DUMP VALVE
BUTTON
BUTTON
minute cool down period must be observed
PURGE
VALVE
TO ATMOSPHERE
START
VALVE
PILOT
IGNITION
DUMP VALVE
SWITCH
before attempting another engine start
AIR
STARTER
DRAIN
ENGINE
VALVE
MOTOR
SPEEDPROBE
ESSENTIAL SERVICES BUS
DRAIN
OVERBOARD
ENGINE STARTING SYSTEM BLOCK
NOTE: GTS starts not reliable at altitudes
DIAGRAM
above 15,000 ft MSL.
NOTE: The GTS three minute delay between
consecutive starts does not apply in emergency
situations.
WARNING: Engine starts with the throttle
above the ground idle position may cause
engine surge/over-temperature.
2.
Starting system components function
Overlay 1
GTS
a.
GTS: gas turbine air producer unit
Overlay 2
Input Power
(1) GTS starter motor and GTS
igniters powered by 28 VDC
Overlay 3
essential services bus
Fuel
Overlay 4
(2) GTS fuel obtained from aircraft
GTS Start Button
fuel system downstream from LP
fuel shutoff valve
(3) Started by pressing GTS start
Overlay 5
button
GTS Advisory Lights
(a) When GTS reaches idle
speed, a green GTS advisory
light illuminates in both
cockpits and GTS starter
motor disengages
(8-03) Original
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