2. I. (4) (c) Symbol Generator 3 (EICAS Normal) Fai 1ure
A failure of SG No. 3 would show itself in one of the following
manners:
.
Red X on the ENGINE display
● Red X on the CAS display
. Red X on both the ENGINE and CAS displays
The reversionary mode for this failure is to select the EICAS
SG reversionary knob from the NORM to the ALT position. The SG
driving the copilot’s PFD and ND at that moment, normally SG
No. 2, would then drive the EICAS displays as well as the
copilot’s PFD and
ND.
If SG No. 2
control was selected to the
alternate position prior to the SG No. 3 failure, then SG No. 1
would be in use by all six DUS and a multiple SG failure
condition would exist (refer to paragraph
2.I.(4)(d)).
(d) Multiple SG Failures
- A single SG is capable of driving the
six DUS in the G-IV EFIS/EICAS system
in the event that any two
SGS fail.
The pilot’s and copilot’s PFD and NDwould be
identical
in this case.
All same source indications (amber
source annunciations) would be on each display.
The sinqle SG
reverts to the pilot~s DC for display command;
which SG is driving the six DUS.
If the pilot
single SG reverts to the copilot’s DC for disp”
(5) Display Controller Failures
regardles~ of
s DC fails, the
ay commands.
(a) Pilot’s DC Fails - In the event that the pilot’s DC fails, the
SG driving the pilot’s displays automatically revert to the
following display source
selections:
~
@
IRS 1
MAP Mode
DADC 1
FMS 1
NAV 1
ID WAYPT
RADALT 1
RAD ALT SET - 200
BRG - AUTO
BARO - IN
FD CMD - SC
22-14-00
Page 298.33
Aug 15/91
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