If display information is lost on one side due
to malfunction or failure of one unit/channel,
the reversion control panel can be used to se-
lect the remaining system/channel to provide
information to both sides. The reversion panel
is located below DU2 (Figure 16-1) and con-
tains four switches, each with three positions
(Figure 16-4). The center position on each is
the normal position (NORM), with selection
on either side for a reversion selection.
The display units are identified as DU1
through DU4, starting at the left (Figure 16-
2). The display units each have a bezel con-
troller for pilot inputs and selections. The
two outboard display units (DU1 and DU4)
function only as PFDs (primary flight dis-
plays), whereas the inboard units (DU2 and
DU3) can be used to display EICAS or MFD
(multi-functional display) formats. The in-
board units are also capable of displaying the
PFD format in a reversion mode. DU2 will
normally have the EICAS format displayed on
it and DU3 will normally display the MFD for-
mat (Figure 16-2).
Two display controllers on the glareshield and
a bezel control on each PFD provide the crew
with the means to control various display for-
mats on the PFD, as well as the intensity of the
display. Bearing pointer select functions is
also controlled from the display controllers.
DISPLAY GUIDANCE
COMPUTER (IC-600 OR
IC/SG)
GENERAL
The IC-600s have circuit cards installed to
perform the following:
• Symbol generators (Both IC-600s)
• Flight director computers (Both IC-600s)
• Primary trim (No. 1 IC-600 only)
• Configuration trim (No.1 IC-600 only)
• Mach trim (No.1 IC-600 only)
• Autopilot/Yaw damper computer (No.2
IC-600 only)
• Secondary trim (No. 2 IC-600 only)
• Rudder boost (No.2 IC-600 only)
The left and right IC-600’s have the same cir-
cuit boards and part numbers, but the pins that
are used on the left and right connectors are dif-
ferent to allow for different functions of the two
IC-600’s. Also, on aircraft 45-120 and subse-
quent and on earlier aircraft modified by SB
45-22-4, the IC-600’s each incorporate an in-
tegration module (IM-600) to allow configu-
ration strapping for different options. If the
configuration strapping between the IM-600’s
does not agree, an amber “CNFG MISMATCH”
CAS message is posted. If a communication
failure has occurred between the IC-600 and
IM-600, a white “IC 1 or 2 CNFG FAIL” CAS
will be posted. The IC-600 will continue to
function properly, and will power up with the
configuration stored at the last power down.
In addition to generating the flight instrument
displays, the IC-600 also processes informa-
tion from other systems for display on the PFD
and MFD such as weather radar, TCAS (if in-
stalled), and navigation information. The IC-
LEARJET 45 PILOT TRAINING MANUAL
16-3
FOR TRAINING PURPOSES ONLY
FlightSafety
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