Fokker 50 - TAWS Built-in Test Procedure; TAWS System Self-Test Procedure

Build in test
The TAWS system should be tested with the push button located at the LH main instrument
panel and the weather radar control panel first flight of the day.
Ensure the Terrain Inhibit Switch is not engaged, and Radar is in Test Mode. TAWS Display
on both HSIs: Pops Up with TAWS color test pattern
TEST PROCEDURE EXPECTED RESULT
ANNUNCIATOR AUDIO-SPEAKER & HEADSETS
GPWS – Both Instrument
Panels
“TERRAIN AHEAD, TERRAIN AHEAD”
“PULL UP, PULL UP”
TERR “CAUTION TERRAIN”
TERR “TOO LOW TERRAIN”
“FIVE HUNDRED”
TERR “TOO LOW GEAR”
TERR “TOO LOW FLAPS”
TERR “SINK RATE”
TERR “DON’T SINK”
BELOW G/S “GLIDESLOPE”
“BANK ANGLE”
GPWS INOP
ANNUNCIATOR
TERRAIN INOP
ANNUNCIATOR
TERRAIN INHIBIT
ANNUNCIATOR
COMPLETION OF SELF-
TEST
At the end of the test, verify that GPWS, TERR, BELOW
G/S, G/S INHIBIT, and FLAP OVRD annunciators
extinguish.
TERRAIN INOP and GPWS INOP remain lit for
approximately 1 minute as TAWS re-boots
Red
Yellow
Green
Blue (light)
Black
White
Magenta
Fokker 50 - Flight Navigation Instruments
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