NAVIGATION AND
COMMUNICATION
AIRPLANE
OPERATIONS
MANUAL
2-18-30
Page
22
Code
02
MARCH 30, 2001
COMPARISON MONITORS
1 - ATTITUDE COMPARISON MONITOR DISPLAY
− Label: ROL, PIT or ATT.
− Color: Amber.
− If roll information deviates by more than 6 degrees between the
PFD 1 and PFD 2, a ROL comparison monitor will be displayed
inside the attitude sphere.
− If pitch information deviates by more than 5 degrees between
the PFD 1 and PFD 2, a PIT comparison monitor will be
displayed in the upper-left portion of the attitude sphere.
Simultaneous activation of the both pitch and roll comparison
monitors will be announced by an ATT label displayed in the
upper-left portion of the attitude sphere, in the same field of the
ROL and PIT comparison monitors.
2 - ATTITUDE FAILURE DISPLAY
− Removal of the pitch scale and roll pointer.
− Coloring the attitude sphere overall blue.
− A red ATT FAIL label is displayed on the top center of the
attitude sphere.
3 - ATTITUDE SOURCE ANNUNCIATION
− Label: ATT1 for IRS 1 and ATT2 for IRS 2.
− Color: Amber when one AHRS supplies both sides or both IRS
are supplying cross-side.
− Annunciations are removed when both IRS are supplying on-
side PFDs.
4 - HEADING SOURCE ANNUNCIATION
− Label:
− MAG1 or MAG2 when cross-side IRS source is selected.
− Color:
– For MAG: amber when the same IRS is supplying both sides
or both IRS are supplying cross-side.
− When both IRS are supplying on-side, annunciation is removed.
− If a heading source becomes invalid the heading source
annunciation will refer to the invalid heading source, HDG1 or
HDG2, as applicable.
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