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or at any position between the IDLE and
CRU detents. When the throttle is not in a detent,
FADEC estimates the intended thrust
level based on throttle position and adjusts
the engine accordingly.
A barrier (gate) between the IDLE and CUT OFF
detents prevents accidental engine cutoff and
protects against accidental throttle advance out
of CUT OFF. To move a throttle above or below
the gate, use one finger to pull up the springloaded
slide latch (triggers) under the throttle
handle and hold the slide latch up while using
the rest of the hand to move the throttle over the
gate. When the throttle is over the gate, release
the slide latch, and verify the throttle is full aft
(on the IDLE detent).
On the outboard side of each throttle handle,
a large slide switch controls the speedbrakes,
and a small GO AROUND pushbutton switch
disconnects the autopilot and sets the flight director
for a go-around. Refer to Chapter
15—“Flight Controls” for details on speedbrakes,
and refer to Chapter 16—“Avionics”
for details on the GO AROUND switch.
L AND R IGNITION SWITCHES
The L and R IGNITION switches are on the
lower instrument panel, left of the pilot control
wheel. Each switch has two positions: ON
and NORM (Figure 7-16). In the NORM position,
ignition is controlled by the respective
engine FADEC, which automatically energizes
igniters as necessary. FADECs energize
igniters during engine start, or if the FADEC
detects flameout and activates autorelight.
In the ON position, the igniters operate
continuously.
ENGINE START SWITCHES
ENGINE START switches are grouped on the
tilt panel, left of the pilot control wheel. Each
is a lighted pushbutton switch. These include
the L and R ENGINE START switches and
the DISENG switch. Each pushbutton switch
is a momentary-contact switch (Figure 7-16):
• L and R ENGINE START switches—
When the engines are not running, the
L and R ENGINE START switches control
the corresponding engine starters.
Pressing either switch energizes the corresponding
engine starter. Refer to
Chapter 2—“Electrical Systems” for details
on these switches and engine-start
operations.
Figure 7-16. ENGINE START and IGNITION
Switches
CITATION MUSTANG OPERATING MANUAL
7-14 510OM-00
• DISENG switch—The DISENG switch
(starter-disengage switch) opens the start
relay. This may be required if a starter continues
to operate too long, or when the
engine has reached too high a speed without
the starter automatically disengaging.
ENGINE SYNC SWITCH
The ENGINE SYNC switch is on the throttle
quadrant, to the right of the CUT OFF position
of the right engine throttle (Figure 7-17).
The switch enables or disables the engine synchronization
capability of the FADECs. It has
two positions: NORM and OFF. In the OFF position,
engine synchronization is disabled. In
the NORM position, FADECs automatically
control engine synchronization in flight when
all of the following conditions are true:
• ENGINE SYNC switch is in the NORM
position
• Landing gear are retracted
• Each throttle is out of the TO detent and
above the IDLE detent
• Throttle levers are within 5° of each other
• N1 references are within 5% of each other
ENGINE INDICATING AND
CREW ALERTING SYSTEM
The engine indication and crew alerting system
(EICAS) contains all indications for the
powerplant and its systems. These include
continuous engine indications and crew alerts
as necessary. In normal EICAS display mode,
these indications are in two columns on the left
side of the G1000 multifunction display (MFD)
(Figure 7-18).
Reversionary mode is selected by pressing the
red DISPLAY BACKUP button at the bottom
of either audio control panel. In this mode,
most of these indications are presented in a single-
column EICAS display. The reversionary
mode EICAS display normally is on the left
side of the pilot and/or copilot PFD. In reversionary
mode, some EICAS displays are
simplified or eliminated, and crew alerts appear
in a box on the right side of the affected
display (Figure 7-19).
The FADECs pass information to and from
the GIAs. The GIAs then send updated engine
performance and fault information to the
EICAS display. The FADEC provides engine
data to the EICAS for:
• N1 % rpm
• N2 % rpm
• ITT
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