OPERATIONS MANUAL

Power Plant
Engine Start Control:
Engine start switch (engines 1, 2, 3, 4)
On the ground, or inflight at low airspeeds, the N2 (or N3) rotor may be
spooled up by a pneumatically driven starter motor; bleed air is directed to
the starter motor through the engine bleed air valve and the start valve.
Pull If autostart is installed and on: arms the start valve and bleed air valve.
If autostart is off: opens the start valve and bleed air valve immediately.
In either case, when the N2 (or N3) RPM rises to 50%, the start switch
automatically returns to the in-position, and the start valve and bleed
air valve close.
WHITE
LIGHT
Start valve is open.
Engine autostart switch
OFF Disables the autostart system on all engines. The respective fuel control
switch must not be set to RUN before the N2 (or N3) RPM is spooled
up to the fuel-on minimum.
ON Enables the autostart system on all engines. The respective fuel control
switch must be set to RUN to initiate the autostart program.
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