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TERRAIN AWARENESS WARNING SYSTEM (TAWS) (Cont)
MODE 7 — Windshear Warning
Mode 7 provides alerts and warnings when significant windshear is detected by the TAWS. Mode 7 is active during takeoff
and landings phase of flight only, between 10 and 1500 feet AGL. There are two types of windshear warnings: increasing
performance (updraft/headwind) and decreasing performance (downdraft/tailwind).
- For an increasing performance shear (updraft/headwind), the flight director display is removed from the display, an
increasing performance shear WINDSHEAR (W) flashes for 5 seconds, then remains steady. An aural tone,
“WINDSHEAR WINDSHEAR” warning is activated.
- For a decreasing performance shear (downdraft/tailwind), the flight director display is removed from the display,
WINDSHEAR
(W) flashes for 5 seconds, then remains steady. An aural tone, “WINDSHEAR WINDSHEAR”
warning is activated.
CF
O
1701002
_022
RUNWAY
MICROBURST
2000
2000
3000
1000
1000
3000
6
4
2
0 0
2
4
6
DOWNDRAFT (FEET PER MIN)
UPDRAFT (FEET PER MIN)
CAUTION
WINDSHEAR
AREA
INCREASING
HEADWIND
(KTS PER SEC)
DECREASING
HEADWIND
(KTS PER SEC)
WINDSHEAR
WARNING
AREA
"WINDSHEAR
WINDSHEAR
WINDSHEAR"
WINDSHEAR
CAUTION LAMP
MODE 7
EXCESSIVE
WINDSHEAR
DETECTION
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