Digital Air Data (Dadc) Failures); Heading Select Failure; Course Select Failure; Course Deviation Failure - Honeywell SPZ-8000 Maintenance Manual

2. c. (9) (g) Digital Air Data (DADC) Failures) - In the event of a failure
of the displayed
DADC, CAS or Mach, altitude, vertical speed,
and
AOA,
the failure indication is
as shown
in Figure 209.
~
In the
case of the CAS (Mach) and altitude scales, data is
removed from the current value pointer, the scale markings
are removed, and a red "X" is drawn through the scale.
The
digital Mach (CAS) display failure is shown by replacing the
numerical value with amber dashes.
~ In
the case of the vertical speed and
AOA
scales, the
current value pointer is removed and a
red "X" is drawn
through the scale.
(h)
Heading Select Failure - Failure of the heading select signals
will cause the digital display to be replaced by amber dashes
with the heading
bug removed from the display.
This indication
will
also be given
in the event of an invalid heading display
(Figure 209).
(i) Course Select Failure - Failure of the course select signals
will cause the display to be replaced by amber dashes with the
course pointer removed from the display. This indication will
also be given in the event of an invalid heading display or FMS
source (Figure 209).
(j) Distance
Display Failures - Failure of either the DME or
FMS
distance signals is indicated by replacing the digital distance
value with amber dashes (Figure 211).
(k) Course Deviation Failure - A failure of the course deviation
indicator is shown by removing the deviation bar and displaying
a red "X" through the deviation dots (Figure 211).
(1) EFIS Self-Test - This test can be initiated through the on-side
display controller (TEST mode) when airspeed is valid and less
than 60 knots and the WOW switch is active. Selecting the EFIS
self-test shows the invalid flags for the following
PFD display
information:
. IRS
. DADC
Flight
Director
. All Comparison Monitor Annunciations Active
. Radio Altitude
. Distance Display
Vertical Deviation Display
22-14-00
Page
231
Apr 15/93
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