Magnetic Heading Validity Discrete; Aoa Vane Heater Discrete; Pli Deselect Switch Discretes (Mk V And Mk Vii Only); Autopilot Disconnect Discretes - Honeywell MK V Line Maintenance Manual

3.8.33 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
Magnetic Heading Validity Discrete

3.8.34 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
AOA Vane Heater Discrete

3.8.35 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
PLI Deselect Switch #1
PLI Deselect Switch #2

3.8.36 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
Autopilot Disconnect #1
Autopilot Disconnect #2
CAGE CODE: 97896
EGPWS LINE MAINTENANCE MANUAL
Invalid =>
False =>
Pressed =>
Not Pressed =>
Pressed =>
Not Pressed =>
Connected =>
Not Connected =>
Connected =>
Not Connected =>
SCALE: NONE SIZE: A
Level 6 Audio readout
Valid => "Magnetic Heading Valid"
"Magnetic Heading Invalid"
Level 6 Audio readout
True => "AOA Vane Heater On"
"AOA Vane Heater Off"
Level 6 Audio readout
"PLI Deselect Switch 1 True"
"PLI Deselect Switch 1 False"
"PLI Deselect Switch 2 True"
"PLI Deselect Switch 2 False"
Level 6 Audio readout
"Autopilot 1 Selected"
"Autopilot 1 Not
Selected"
"Autopilot 2 Selected"
"Autopilot 2 Not
Selected"
DWG NO.: 060-4199-180 REV: G SHEET 47 of 68