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is in the BATT position.
Depressing the L or R ENGINE START button:
• Closes the respective start relay
• Activates the electric fuel boost pump
Closure of the start relay (indicated by illumination
of the start button white light) connects
battery bus power to the starter for
engine rotation.
At approximately 8% turbine rpm (N2):
• FADEC commands fuel flow to the start
nozzles
• Ignition is activated by the full-authority
digital engine control (FADEC)
• A green IGN appears on the multifunction
display (MFD) at the upper interturbine
temperature (ITT) scale and indicates
current to one or both exciter boxes
Within 10 seconds, combustion should occur
as evidenced by rising ITT.
As the engine accelerates through 48.6% N2:
• The GCU starter overspeed sensor automatically
terminates the start sequence.
• The start relay opens.
• The electric boost pump is deenergized.
• The GEN OFF message disappears from
the CAS window(GEN switch ON).
• The green IGN indication extinguishes.
• N2 digits change from white to green.
STARTING (SECOND ENGINE)
For a second engine start on the ground, the
operating generator assists the battery in providing
current to the starter. The operating
engine must be at idle rpm.
When the remaining start button activates,
both start relays close and the white light in
each starter button illuminates.
When one generator relay closes and the other
energizes as a starter, the battery disable relay
causes the battery relay to open the circuit between
the crossfeed bus and the battery bus in
order to protect the 200-amp current limiter.
STARTING (IN FLIGHT)
An engine start in flight using the start button
is a battery start only. The squat switch
disables generator-assist capability when airborne.
Only the associated start relay closes
and the boost pump on that side activates.
The only difference between an in-flight
start and a ground start with one generator
online, is that the start relay on the same
CITATION MUSTANG OPERATING MANUAL
510OM-00 2-13
side as the operating generator does not close
and the battery power relay opens. This isolation
of the start circuit from the operating
generator and buses in flight is through left
squat switch logic and is required by certification
regulations.
The protection circuit for the 200-amp current
limiter is the same as previously described.
Refer to the “Airstart Envelope”
graph in “Limitations” of the Airplane Flight
Manual (AFM).
STARTING (ASSISTED BY
EXTERNAL POWER UNIT)
A GPU can be used for engine starts. Check for
voltage regulation to a maximum of 29 VDC
and 800/1,100 amps.
When external power starts are planned, the
generator switches remain in the OFF position
until the removal of external power from the
aircraft. Otherwise, when the first generator
comes online, the external power relay opens
and the GPU automatically disconnects from
the battery bus. The second engine start becomes
a generator-assist battery start.
EMERGENCY/
ABNORMAL
For specific information on emergency/abnormal
procedures, refer to the appropriate abbreviated
checklists or the FAA-approved AFM.
CITATION MUSTANG OPERATING MANUAL
2-14 510OM-00
CHAPTER 3
LIGHTING
CONTENTS
Page
INTRODUCTION ................................................................................................................... 3-1
GENERAL.............................................................................................................................. 3-1
INTERIOR LIGHTING .......................................................................................................... 3-2
Flight Compartment Lighting .......................................................................................... 3-2
Magnetic Compass Light ................................................................................................. 3-3
Entry/Exit Lighting and Entry Light Switch ................................................................... 3-4
Cabin Lighting ................................................................................................................. 3-4
Passenger Safety Light System........................................................................................ 3-5
Baggage Compartment Lighting...................................................................................... 3-5
EXTERIOR LIGHTING ......................................................................................................... 3-6
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