AIRPLANE
OPERATIONS
MANUAL
FLIGHT
INSTRUMENTS
REVISION 39
2-17-25
Page
5
Code
01
AOM-145/1114
3 - DECISION HEIGHT INDICATION
− Color:
− Digits: cyan
− RA label: white
− Ranges from 5 to 999 ft.
− Resolution: 5 ft below 200 ft, 10 ft above 200 ft.
− If the decision height is set to zero, the indication is removed
from the display.
− In the event of a Radio Altimeter failure, the decision height
digits are replaced by amber dashes.
4 - RADIO ALTITUDE COMPARISON MONITOR DISPLAY
− Label: RA
− Color: amber
− Displayed when the difference between the on-side and cross-
side radio altitude is greater than a set point which is variable
with radio altitude.
− 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.
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