CREW
AWARENESS
AIRPLANE
OPERATIONS
MANUAL
2-04-13
Page
2
Code
01
REVISION 39
AOM-145/1114
7 - GS (GLIDESLOPE)
− Displayed to the lower left of the attitude sphere when
glideslope deviation differs by more than approximately 2/3 dot
(below 1200 ft AGL).
8 - RA (RADIO ALTITUDE)
− Displayed to the lower left of the attitude sphere when radio
altitude data differs by more than the amount calculated by the
formula [(RA1+RA2)x0.0625]+10. Available only with two radio
altimeters installed.
− An amber RA1 is displayed in the event of Radio Altimeter 2
failure. Radio Altitude source is RA1.
− An amber RA2 is displayed in the event of Radio Altimeter 1
failure. Radio Altitude source is RA2.
9 - IAS (AIRSPEED)
− If the on-side and cross-side calibrated airspeed differ by 5 kt or
more for longer than 2 seconds, it is displayed in the upper left
corner of the airspeed tape first flashing, for 10 seconds, and
then steady.
10 - ROL (ROLL ATTITUDE)
− Displayed in the upper left corner of the attitude sphere when
roll attitude data differs by more than ±6º.
11 - ATT (ATTITUDE)
− Displayed in the upper left corner of the attitude sphere when
both pitch and roll comparison monitors have been tripped.
NOTE: The comparison monitor is active when the pilot and copilot
have the same type of data, but different sources selected for
display. For example, if the pilot and copilot both have ILS 1
selected (amber source annunciator), no comparison monitor
is active on that data (localizer and glideslope).
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