AUTOPILOT
AIRPLANE
OPERATIONS
MANUAL
2-19-20
Page
2
Code
01
REVISION 40
AOM-145/1114
NOTE: For airplanes Pre-Mod. SB 145-31-0022, equipped with EICAS
version 16.5, the CAT 2 annunciator may remain green even
with the Autopilot disengaged. Once the CAT 2 limitations
have not changed, before performing CAT 2 approaches on
the mentioned airplanes, the flight crew must check the green
CAT 2 annunciation and also confirm if the Autopilot is
engaged.
LOCALIZER EXCESSIVE DEVIATION WARNING
The Localizer Excessive Deviation Warnings are active when CAT II
is valid. It is triggered between 500 ft and 80 ft of Radio Altimeter
height, when the ILS lateral deviation is greater than 1/3 dot. The
pilots will be alerted by:
The lateral deviation bar on the EHSI are changed from green
to amber.
The lateral deviation scale changing from white to amber and
flashing with a duty cycle of 0.5 second on followed by a 0.5
second off.
NOTE: The on-side excessive deviation warning is also displayed
when the cross-side system has detected an excessive
deviation.
GLIDESLOPE EXCESSIVE DEVIATION WARNING
The Glideslope Excessive Deviation Warnings are active when
CAT II is valid. It is triggered between 500 ft and 80 ft of Radio
Altimeter height, when the ILS vertical deviation is greater than one
dot or when the glideslope deviation warning is invalid for more than
five seconds. The pilots will be alerted by:
The GS pointer on the EADI changing from green to amber.
The GS scale on the EADI changing from white to amber and
flashing with a duty cycle of 0.5 second on followed by 0.5
second off.
NOTE: The on-side excessive deviation warning is also displayed
when the cross-side system has detected an excessive
deviation.
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