Mode 2B is active when the flaps are in landing configuration (or FLAP OVRD enabled), or
when on an ILS approach with less than a 2 dot localizer and glide slope deviation. When the
alert envelope is penetrated and the landing gear is in the down position, “TERRAIN
TERRAIN” aural alert is generated, and the TERR caution annunciator is illuminated and
repeated until the envelope is exited.
When the alert envelope is penetrated and the landing gear is in the up position, “PULL-UP,
PULL-UP” aural warning is generated and the
PULL-UP annunciator is illuminated. The aural warning will be repeated and the annunciator
will remain illuminated until the envelope is exited.
Fokker 50 - Flight Navigation Instruments
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