3.8.29 ACCELERATION SELF-TEST IN PROGRESS DISCRETE
Indicates that Accelerometers are in Self-Test mode. Type: Self-Test status from acceleration sensor. Signal Status: Acceleration Self-Test Active or Inactive
Level 6 Audio readout
In Progress => Acceleration Self-Test Active
Acceleration Self-Test In Progress
Not in Progress => Acceleration Self-Test Inactive

3.8.30 LONGITUDINAL ACCELERATION VALIDITY DISCRETE
Longitudinal Acceleration validity discrete may be used by EGPWS for the Acceleration sensor.
Type: Validity from Acceleration sensor.
Signal Status: Valid or Invalid

Level 6 Audio readout Valid => “Longitudinal Acceleration Valid” Longitudinal Acceleration Validity Invalid => “Longitudinal Acceleration Invalid” Discrete

3.8.31 NORMAL ACCELERATION VALIDITY DISCRETE
Normal Acceleration validity discrete may be used by EGPWS for the Acceleration sensor.
Type: Validity from Acceleration sensor.
Signal Status: Valid or Invalid

Level 6 Audio readout Valid => “Normal Acceleration Valid” Normal Acceleration Validity Discrete Invalid => “Normal Acceleration Invalid”

3.8.32 MAGNETIC HEADING VALIDITY DISCRETE
A Magnetic Heading validity discrete may be used by EGPWS for the Magnetic Heading sensor.
Type: Validity from Magnetic Heading sensor.
Signal Status: Valid or Invalid

Level 6 Audio readout Valid => “Magnetic Heading Valid” Magnetic Heading Validity Discrete Invalid => “Magnetic Heading Invalid”

3.8.33 AOA VANE HEATER DISCRETE
An AOA Vane Heater Discrete may be used by EGPWS for indication of vane heat for flight history recording.
Type:  Heater Flag from AOA vane. 
Signal Status:  Vane Heater On or Vane Heater off 
Level 6 Audio readout 

True => “AOA Vane Heater On”
AOA Vane Heater Discrete
False => “AOA Vane Heater Off”

3.8.34 PLI DESELECT SWITCH DISCRETES (MK V AND MK VII ONLY)
PLI deselect switch discretes may be used by EGPWS for de-activating the PLI select relays to remove EGPWS PLI indication from the ADI. Type: momentary make/break switch Signal Status: EGPWS PLI deselected
Le vel 6 Audio readout 
PLI Deselect Switch #1  Pressed  => Not Pressed =>  “PLI Deselect Switch 1 True” “PLI Deselect Switch 1 False” 
PLI Deselect Switch #2  Pressed  => Not Pressed =>  “PLI Deselect Switch 2 True” “PLI Deselect Switch 2 False” 

3.8.35 AUTOPILOT DISCONNECT DISCRETES
Autopilot Disconnect discretes may be used by EGPWS for indication that the Autopilot has been disconnected. Type: Autopilot Disconnected Signal Status: Autopilot Connected or Not Connected
　
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