SECTION 10 – HAZARD

AVOIDANCE

Pop-up Alerts

When a terrain or obstacle alert is issued, a pop-up window is displayed on the MFD with the appropriate alert.

Figure 10-30 TAWS Alert Pop-Up

Press the ENT Key to display the TAWS Page, or press the CLR Key to remain on the existing page.

		Unlighted Obstacle	Lighted Obstacle	Unlighted Obstacle	Lighted Obstacle	Potential Impact Points
		(Height is less than	(Height is less than	(Height is greater than	(Height is greater than
		1000’ AGL)	1000’ AGL)	1000’ AGL)	1000’ AGL)

Figure 10-31 TAWS Symbols

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TAWS Alerts Summary
The following table shows the possible TAWS alert types
with corresponding annunciations and aural messages.
		PFD/MFD TAWS		MFD
Alert Type		Page			Aural Message
				Pop-Up Alert
		Annunciation
Excessive Descent Rate Warning (EDR)					“Pull Up”
Reduced Required Terrain Clearance					“Terrain, Terrain; Pull Up, Pull Up”
Warning (RTC)				or	or
					“Terrain Ahead, Pull Up; Terrain Ahead, Pull Up”
Imminent Terrain Impact Warning (ITI)					“Terrain Ahead, Pull Up; Terrain Ahead, Pull Up”
				or	or
					“Terrain, Terrain; Pull Up, Pull Up”
Reduced Required Obstacle Clearance					“Obstacle, Obstacle; Pull Up, Pull Up”
Warning (ROC)				or	or
					“Obstacle Ahead, Pull Up; Obstacle Ahead, Pull Up”
Imminent Obstacle Impact Warning (IOI)					“Obstacle Ahead, Pull Up; Obstacle Ahead, Pull Up”
				or	or
					“Obstacle, Obstacle; Pull Up, Pull Up”
Reduced Required Terrain Clearance Caution					“Caution, Terrain; Caution, Terrain”
(RTC)				or	or
					“Terrain Ahead; Terrain Ahead”
Imminent Terrain Impact Caution (ITI)					“Terrain Ahead; Terrain Ahead”
				or	or
					“Caution, Terrain; Caution, Terrain”
Reduced Required Obstacle Clearance					“Caution, Obstacle; Caution, Obstacle”
Caution (ROC)				or	or
					“Obstacle Ahead; Obstacle Ahead”
Imminent Obstacle Impact Caution (IOI)					“Obstacle Ahead; Obstacle Ahead”
				or	or
					“Caution, Obstacle; Caution, Obstacle”
Premature Descent Alert Caution (PDA)					“Too Low, Terrain”
Altitude Callout “500”		None		None	“Five-Hundred”
Excessive Descent Rate Caution (EDR)					“Sink Rate”
Negative Climb Rate Caution (NCR)					“Don’t Sink”
				or	or
					“Too Low, Terrain”
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The following system status annunciations may also be issued.

		PFD/MFD TAWS	MFD
	Alert Type	Page		Aural Message
			Pop-Up Alert
		Annunciation
	TAWS System Test Fail		None	“TAWS System Failure”
	TAWS Alerting is disabled		None	None
	No GPS position or excessively degraded		None	“TAWS Not Available”
	GPS signal			“TAWS Available” will be heard when sufficient
				GPS signal is re-established.
	System Test in progress		None	None
	System Test pass	None	None	“TAWS System Test OK”

Alert Annunciations

Alert Annunciation

Figure 10-33 TAWS Alert Annunciation on the PFD

Alert Annunciation

Figure 10-32 Alert Annunciation on the TAWS Page

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