Honeywell Bendix/King KFD 840 Primary Flight Display
HDG (HEADING) FAIL, CRM FAILURE (COMPASS
REMOTE MAGNETOMETER)
A
"HDG
FAIL" message indicates that the CRM500, Compass
Remote Magnetometer, has either failed or lost communication with
the KFD 840. Loss of communication or internal failure will remove
all heading data from the display; however it will not have any impact
on the pitch or roll attitude display.
The pilot must fly using the standby instruments when the
magnetometer has failed.
Figure 10-3 Heading Fail
KFD 840 PG PN 7450-0840-01
Emergency Operations
Rev C May 28, 2010
10-3
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