Honeywell Bendix/King KFD 840 Primary Flight Display
HSI Area KFD 840 PG PN 7450-0840-01
7-4 Rev C May 28, 2010
© Honeywell International Inc. Do not copy without express permission of Honeywell
Heading Select Bug Off-scale
When the compass is displayed in ARC HSI mode and the heading
select bug goes beyond the range, a magenta off-scale arrow on the
side of the compass arc that is nearer to the selected heading points
toward the magenta bug.
Figure 7-4 Heading Select Bug Off-Scale
Heading Data Invalid
If heading data is invalid,
cardinal and intermediate
headings are removed; the
heading, course selection,
distance readout, and
identifier are replaced with
amber dashes, a red HDG
FAIL flag is displayed in the
middle upper portion of the
compass display.
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