Heading Select Bug Off-Scale; Heading Data Invalid - Honeywell BENDIXKing APEX EDGE Series Pilot's Manual

Honeywell Bendix/King KFD 840 Primary Flight Display

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

HSI Area
7-4
© Honeywell International Inc. Do not copy without express permission of Honeywell
If heading data is invalid,
cardinal and intermediate
headings are removed; the
heading, course selection,
distance readout,
identifier are replaced with
amber dashes, a red HDG
FAIL flag is displayed in the
middle upper portion of the
compass display.
KFD 840 PG PN 7450-0840-01
Rev C May 28, 2010
and