Peaks mode display
Color Indication
Solid Green Highest terrain/obstacle not within 500 ft of aircraft altitude
50% Green Fill Terrain/Obstacle that is the middle elevation band
16% Green Terrain/Obstacle that is the lower elevation band
Black No significant terrain/obstacle
16% Cyan Fill Water at MSL
Magenta Fill Unknown terrain. No terrain data in the database for the magenta area
shown
System test
A system self test may be performed on the ground by pressing the TEST button located at
the captain's MAIN INSTRUMENT PANEL.
NOTE: The TAWS Display Unit must be switched ON when performing a self test.
During the self test, the TAWS Display Unit self test pattern Is displayed for approximately 10
seconds and the call outs 'PULL UP', 'TEBR"AIN, TERRAIN -PULL UP', and if tuned to an
active ILS frequency 'GLIDESLOPE' are generated. During the self test the following lights
illuminate and/or extinguish:
• The FAULT light in the GPWS p/b at the OVERHEAD PANEL.
• The amber TAWS light in the TAWS p/b at the MAIN INSTRUMENT PANEL.
• The FLAP OVRD light in the FLAP OVERRIDE p/b at the captain's MAIN INSTRUMENT
PANEL.
• The STEEP APPR light in the STEEP APPROACH p/b at the captain's MAIN
INSTRUMENT PANEL.
• The GPWS/GS lights in the GPWS/GS p/b at the MAIN INSTRUMENT PANEL.
When the GPWS TEST button is depressed on the ground for seven seconds or longer, all
the voice warnings are generated.
Fokker 50 - Flight Navigation Instruments
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