EGPWS LINE MAINTENANCE MANUAL
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO.: 060-4199-180 REV: G SHEET 49 of 68
3.8.41 WEIGHT ON WHEELS DISCRETE
Weight On Wheels Discrete may be used by EGPWS to determine if the aircraft is on the ground.
Type: Weight On Wheels Status
Signal Status: On Ground or Not On Ground
Level 6 Audio readout
Weight On Wheels Discrete
Selected =>
Not Selected =>
“On Ground”
“Not On Ground”
3.8.42 GPWS INHIBIT DISCRETE
This discrete inhibits all audio and visual except for Windshear, Terrain Awareness and TCF.
Type: Analog discrete input from a flight deck mounted switch
Signal Status: GPWS enabled or disabled
Fault monitoring: Activation of this input for more than 5 seconds will result in the ‘GPWS Inhibit’ fault which will
cause a GPW INOP indication.
Level 6 Audio readout
GPWS Inhibit Discrete
GPWS Inhibit =>
Not Inhibit =>
“GPWS Inhibit”
“GPWS Not Inhibit”
3.8.43 RAAS ENABLE DISCRETE (MK V AND MK VII ONLY)
Type: Discrete for enabling RAAS functionality
Signal Status: RAAS Enabled or Disabled
Level 6 Audio readout
RAAS Enable Discrete
True =>
False =>
“Runway Awareness Enabled”
“Runway Awareness Disabled”
3.8.44 RAAS INHIBIT DISCRETE (MK V AND MK VII ONLY)
Type: Discrete for inhibiting RAAS functionality, also inhibits Long Landing Monitor and Takeoff Flap
Configuration Monitor
Signal Status: RAAS Inhibit or Not Inhibit
Level 6 Audio readout
RAAS Inhibit Discrete
True =>
False =>
“Runway Awareness Inhibit”
“Runway Awareness Not Inhibit”
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