C.A.R.D. 060 Troubleshooting Guide download pdf (Page 40)

EGPWS LINE MAINTENANCE MANUAL

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3.8.6 FLAP POSITION DISCRETES

Up to four flap position discretes are typically supplied from the flap selector handle switch.

Type: Supplied by Flap selector handle switch.

Signal Status: Flap position selected.

Fault monitoring: Depending on the installation, activation of more than one, or none of these discretes for more

than 30 seconds will result in a Flap Unreasonable indication.

Level 6 Audio readout

Flap Position Discrete #1 Selected =>

Not Selected =>

“Flap 1 True”

“Flap 1 False”

Flap Position Discrete #2 Selected =>

Not Selected =>

“Flap 2 True”

“Flap 2 False”

Flap Position Discrete #3 Selected =>

Not Selected =>

“Flap 3 True”

“Flap 3 False”

Flap Position Discrete #4 Selected =>

Not Selected =>

“Flap 4 True”

“Flap 4 False”

3.8.7 SELF-TEST DISCRETE

Type: Supplied by momentary actuated cockpit self-test switch

Signal Status: Self-Test or Normal

Fault monitoring: Activation of this input continuously for more than 60 seconds will result in the "Self-Test Invalid”

fault which will cause a GPWS INOP indication.

Note: This input is used to start and stop the Level 6 Self-Test, there is no audio output for this discrete in Level 6.

3.8.8 STEEP APPROACH DISCRETES

To activate Steep Approach, both of the Steep Approach discretes must be selected. Discrete #1 should be enabled

if Steep Approach is to be used, and can be permanently enabled. Discrete #2 should be selected in flight when

starting a steep approach, it should not be permanently selected. On ground Self-Test is inhibited if Steep Approach

is active.

3.8.8.1 STEEP APPROACH DISCRETE #1 (MK V AND MK VII ONLY)

Type: Steep Approach Enabled

Signal Status: Steep Approach Enabled or Disabled

Level 6 Audio readout

Steep Approach Discrete #1

Enabled =>

Disabled =>

“Steep Approach Enabled”

“Steep Approach Disabled”

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