Placing the reversion selector to the PFD po-
sition on either side causes the PFD format to
move to the inboard display tube on that side
a n d t h e o u t b o a r d d i s p l a y u n i t t o b l a n k .
Additionally, if PFD is selected on the pilot’s
side the displaced EICAS display will auto-
matically move to DU3 and replace the MFD
display. If PFD is selected on the copilot’s side,
the PFD display moves to DU3 and the MFD
display is not available. Should it become nec-
essary for both pilots to select the PFD dis-
plays to the inboard DUs, page 1 of the
engine/system displays will automatically be
displayed on RMU1. Also, through default
logic, the #1 RMU will automatically display
page 1 of the engine and system pages if nei-
ther IC-600 is outputting the EICAS display for-
mat to one of the large display units.
The DU2 reversion selector also has an OFF
position, since it is not controlled with the
avionics master switches (electrical control
panel). The OFF position is used for electri-
cal load shedding in the event of dual gener-
a t o r f a i l u r e . T h e c o p i l o t ’s d i s p l a y u n i t
reversion switch does not have an OFF posi-
tion since it is selected off with the right avion-
ics master switch.
It is important to note that when selecting dis-
play unit reversion, the bezel controllers on
DU1 and DU4 continue to work with the PFD
display when it is transferred to an inboard
display unit.
Single Display Unit Failure:
Should the pilot's DU1 fail, the PFD format can
be transferred to DU2, and the EICAS format
automatically replaces the MFD format, previ-
ously displayed on DU3. Navigation informa-
tion is displayed on the PFDs or either RMU.
Should DU2 experience a failure, the EICAS
information must be transferred to DU3 by
pilot selection, replacing the MFD format.
Either the DU2 or DU3 reversion switch can
be depressed to make the transfer. Both PFDs
remain displayed on the outboard display units.
Should DU3 fail, no automatic changes to the
display configuration will occur. Navigation
information, as desired, can be monitored as
above on the PFDs/RMU.
Should DU4 fail, the copilot's PFD format can
be transferred to DU3 replacing the MFD.
Navigation data can then be selected, as above,
with DU1 failure.
In all cases, with a single display unit failure,
the MFD display will be lost on the DUs, leav-
ing both PFDs and the primary EICAS display.
Multiple Display Unit Failures:
Should the two inboard display units fail, both
PFDs remain displayed on the outboard DU's.
The engine/systems pages can be selected for
display on either RMU. The other RMU con-
tinues to function as a radio management unit,
and the navigation information can be dis-
played on the PFD formats, or time shared on
the RMU, as desired.
If any combination of two of the four display
units fail, it should still be possible to either
display two PFDs and display the engine in-
struments on the RMU, or in some cases, it will
be possible to display one PFD and the EICAS,
and flight instruments with the standby flight
instruments. If three DUs fail, the pilot can ei-
ther put a PFD display on the remaining CRT
and put the engine instruments on the RMU or
leave the EICAS (if DU2 or DU3 remaining)
and fly the airplane using the standby instru-
ments.
Should the airplane experience a dual gener-
ator failure, most of the EFIS displays will be
selectively disabled via checklist procedures
to prolong emergency and main airplane bat-
tery life. In this scenario, the AFM procedure
c a l l s f o r s e l e c t i n g t h e Av i o n i c s M a s t e r
switches off, which turns off power to DUs 1,
3, and 4. The only display unit remaining will
be DU2. The standby instrument group must
be relied upon for airspeed, attitude and alti-
tude and EICAS information will be displayed
on DU2 until it is turned off or until the left
main battery is depleted. If desired, the pilot
can select PFD on the DU2 reversion switch.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-43
FOR TRAINING PURPOSES ONLY
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