Embraer 175 - Cat II Warnings

AIRPLANE
FLIGHT
MANUAL
SUPPLEMENT 5
CAT II
OPERATION
ANAC APPROVED S5-00
REVISION 6 code 01 Page 3
AFM
-
1385
− Both Flight Directors operational.
− Attitude and Heading valid on both PFD’s.
− Glide slope and Localizer deviation valid on both PFD’s.
− No reversions (IRS and ADC) modes selected on both PFD’s.
− Valid Airspeed and Baro Altitude on both PFD’s.
− No comparison monitors are tripped (FPA, Attitude, Heading,
Airspeed, Baro Altitude, Localizer, Glide slope and Radio
altitude) on both PFD’s.
− No back course selected.
− The EICAS message APPR 2 NOT AVAIL not presented.
− Both Display Control Panels set to the same CAT II Decision
Height.
− RA/BARO Minimums Selector knob set to RA.
− No TCS Button pressed.
NOTE: When the green APPR 2 annunciator is enabled, the localizer
lateral deviation scale is expanded with the external limits
representing the excessive deviation points.
If the green APPR 2 annunciation is displayed and one of the following
conditions is achieved, the amber APPR 1 ONLY annunciation will
flash active characters inverse video for 5 seconds then steady in
conjunction with the RA Minimum Selected Digital Readout:
− No valid Radio Altitude displayed.
− Airplane no longer APPR 2 capable.
− Crew selects flaps position other than 5 below 800 ft.
− EICAS message SLAT-FLAP LEVER DISAG displayed.
− Either Minimums Selected Readouts change from RA to
BARO.
− LOC frequency or inbound course mismatch.
CAT II WARNINGS
LOCALIZER, GLIDE SLOPE AND RADIO ALTITUDE COMPARATORS
W
ARNINGS
A comparison between the localizer, glide slope and radio altitude
deviation indications are performed when the following conditions are
met:
− On-side radio altitude valid and below 1500 ft.