Pfd Caution And Warning Displays - Honeywell SPZ-8000 Maintenance Manual

2. C. (9) PFD Caution and Warning Displays
(a)
Inertial Reference System
(IRS)
Failures and
Flags - The
display
symbology associated with IRS failures is shown in
Figure 209.
~ Failure of either the pitch or roll data is indicated by
removing the pitch scale markings, turning the entire
attitude sphere cyan, and displaying, in red, the label
ATT
FAIL in the top center of the attitude sphere.
~ Failure of the displayed heading is shown by removing the
displayed bearing pointers, course pointer and deviation,
and displaying, in red, the label HDG FAIL at the top center
of the compass rose.
(b) IRS Test mode is shown by displaying the labels ATT TEST and
HDG TEST in the same location as the fail annunciations
discussed above (see Figure 211).
(c) Flight Director Failure - In the event of a flight director
failure, an amber FD
annunciation is displayed
in the left-most
(lateral modes) FGC mode annunciation box. Additionally, the
flight director mode annunciations and cue are removed (Figure
210).
(d) Autothrottle Failure - In the event of failure in the selected
autothrottle, an amber AT annunciation is displayed in the
(center) autothrottle mode annunciation box (Figure 210).
(e) Radio Altitude Failure - In the event of a failure of the radio
altimeter, amber dashes will replace the digital radio altitude
value and the rising runway/brown raster will be removed from
the display if present (Figure 210).
(f) Vertical Navigation Scale - A failure of the source driving the
vertical navigation scale (SRN only) is shown by removing the
deviation pointer and displaying a red "X" through the
deviation dots as shown in Figure 210. When VNAV is invalid,
the VNAV vertical deviation scale is inhibited for display.
22-14-00
Page-228
Aug 15/91
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