AIRPLANE
OPERATIONS
MANUAL
CREW
AWARENESS
REVISION 39
2-04-13
Page
1
Code
01
PFD PRESENTATIONS
COMPARISON MONITORS
The left and right side area for several critical parameters is monitored
by the system. If an excessive difference is detected between left and
right side information, a comparison monitor annunciator for data is
displayed on the PFD.
Active messages are cleared when the miscompare situation has been
corrected.
Comparison monitor annunciators are displayed as follows:
1 - PIT (PITCH ATTITUDE)
− Displayed in the upper left corner of the attitude sphere when
pitch attitude data differs by more than ±5º.
2 - ALT (ALTITUDE)
− Displayed in the upper right corner of the altitude tape when
altitude data differs by more than ±200 ft.
3 - HDG (HEADING)
− Displayed to the upper right of the HSI compass when heading
data differs by more than ±6º (level flight).
4 - LOC (LOCALIZER)
− Displayed to the lower left of the attitude sphere when localizer
deviation differs by more than approximately ½ dot (below
1200 ft AGL).
5 - CAS MSG (CAS MESSAGE)
− Displayed to the lower left of the attitude sphere when a red or
amber CAS message has been triggered by the on-side IAC but
not the cross-side IAC.
6 - ILS (INSTRUMENT LANDING SYSTEM)
− Displayed to the lower left of the attitude sphere when both
localizer and glideslope comparison monitors have been
tripped.
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