T-45C TS, ADV, & IUT CO-02
Engine Start and Poststart
SUMMARY
The prestart checks ensure the aircraft is configured to
start. Engine start is accomplished by momentarily
pressing the GTS start button. This causes the gas
turbine starter to start and accelerate to idle speed,
illuminating the GTS advisory light. When the ENGINE
switch is set to START the GTS accelerates to full power
and the start valve is open to allow the GTS to supply low
pressure air to the air turbine starter which rotates the N1
shaft. When airflow through the engine starts turning the
N1 shaft in the correct direction at greater than 100 rpm
the READY advisory light illuminates. With the READY
advisory light illuminated and with engine rpm between
15 and 20 percent, the throttle is moved to ground idle.
Failure of the READY advisory light to illuminate after
placing the ENGINE switch to START indicates that the
engine is not ready to start.
Monitor EGT and rpm gauges during engine start for
indications of abnormal operation. No rise in EGT within
15 seconds after moving the throttle to idle is an
indication of a wet start. Stagnated rpm below 52% and
EGT approaching the starting limits indicates a hung
start. A rapid increase in EGT that appears likely to
exceed the maximum start EGT limit is an indication of a
hot start. An oil pressure failure is indicated by the OIL
PRESS warning light not going out or illuminating during
the start sequence. An engine fire or GTS fire are
indicated by illumination of the FIRE light or GTS FIRE
light respectively. If the GTS and READY advisory lights
do not go out with the engine rpm above 45% indicates
that the GTS and engine ignition has not shutdown.
Poststart checks ensure that all equipment is turned on
and is checked for proper operation prior to leaving the
line area.
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