3D Connexion GNS 530(A) manual Taws Inhibit, Functional again

SECTION 13

TAWS

Premature Descent Alerting

A Premature Descent Alert (PDA) is issued when the system detects that the aircraft is significantly below the normal approach path to a runway (Figure 13-5).

PDA alerting begins when the aircraft is within 15 nm of the destination airport. PDA alerting ends when the air- craft is either:

TAWS Inhibit

TAWS also has an inhibit mode that deactivates the FLTA/PDA aural and visual alerts. Pilots should use discretion when inhibiting TAWS and always remember to enable the system when appropriate. Only the FLTA and PDA alerts are disabled in the inhibit mode.

Inhibiting TAWS:

Height Above Terrain (Feet)

•0.5 nm from the runway threshold

OR

•at an altitude of 125 feet AGL while within 1.0 nm of the threshold.

700

600

500

400

300

200								“Too Low Terrain”
100
Runway	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Threshold				Distance From Destination Airport (nm)

1)Select the TAWS Page and press the MENU Key. ‘Inhibit Terrain?’ is selected by default (Figure 13-6).

Figure 13-6 TAWS Page Menu

2)Press the ENT Key. The ‘TER INHB’ annunciation is displayed in the TAWS annunciator field when TAWS is inhibited (Figure 13-7).

Annunciator Field

Figure 13-5 PDA Alerting Threshold	Figure 13-7 Annunciator Field
Enabling TAWS:
1)	Select the TAWS Page and press the MENU
	Key. ‘Enable Terrain?’ is selected by default.
2)	Press the ENT Key. The TAWS system is
	functional again.

190-00181-00 Rev. E GNS 530(A) Pilot’s Guide and Reference 13-7