EGPWS LINE MAINTENANCE MANUAL

3.8.20 AOA VALIDITY DISCRETES (MK V AND MK VII ONLY)

Two AOA validity discretes may be used by EGPWS, one for each source of AOA. Input will come from either an AOA Indication System or a Stall Warning Computer, depending on the type being used by the aircraft.

Type:

Fail Flag from AOA Indication System or a Stall Warning Computer

Signal Status:

Fail or Not Fail

 

 

 

 

 

 

 

 

 

 

 

Level 6 Audio readout

AOA Validity Discrete #1

 

Valid =>

“AOA 1

Valid”

 

Invalid =>

“AOA 1

Invalid”

 

 

 

AOA Validity Discrete #2

 

Valid =>

“AOA 2

Valid”

 

Invalid =>

“AOA 2

Invalid”

 

 

 

3.8.21 DISPLAY SELECT DISCRETES

Type: Supplied by momentarily actuated cockpit manual switch. Two types are supported:

Type 1: momentary make/break switch

Type 2: toggle type switch

Signal Status: Terrain Awareness Display (TAD) activated if not active or TAD canceled if currently active.

 

 

Level 6 Audio readout

 

Display Select Discrete #1

 

True =>

“Display Discrete 1 True”

 

False =>

“Display Discrete 1

False”

 

 

Display Select Discrete #2

 

True =>

“Display Discrete 2

True”

 

False =>

“Display Discrete 2

False”

 

 

3.8.22 TERRAIN AWARENESS & TCF INHIBIT

Type: Switch for inhibit of Terrain Awareness & TCF functions

Signal Status: Terrain Awareness & TCF Inhibit or Not Inhibit

“Terrain Inhibited” will be enunciated during cockpit Self-Test if inhibited.

Fault monitoring: For some installations, activation of this input for more than 5 seconds will activate the Terrain

Monitor (refer to the Terrain Display Configuration Data table for each aircraft type).

Level 6 Audio readout

Terrain Awareness & TCF Inhibit

Disabled =>

“Terrain Off”

Normal =>

“Terrain On”

3.8.23 SIMULATOR REPOSITION (MK V AND MK VII ONLY)

Type:

Switch for activating Simulator Reposition

Signal Status:

Reposition or Normal

If the Simulator Reposition program pin option is activated, then this discrete can be used to ‘preset’ the EGPWS to match simulator initial conditions.

Level 6 Audio readout

Simulator Reposition Discrete

Reposition =>

“Simulator Reposition On”

Normal =>

“Simulator Reposition Off”

CAGE CODE: 97896

SCALE: NONE SIZE: A DWG NO.: 060-4199-180

REV: G

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Honeywell manual AOA Validity Discretes MK V and MK VII only, Display Select Discretes, Terrain Awareness & TCF Inhibit

MK VIII, MK V, MK XXII, MK VII, MK VI specifications

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The Honeywell MK VI control system is renowned for its ability to provide effective plant control and management tools, featuring advanced operator interfaces and robust hardware components. It employs a modular design, which allows for easy scalability and integration into existing infrastructure. The MK VI is equipped with Ethernet-based communication protocols, ensuring high-speed data transfer and enabling seamless connectivity with other systems.

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Overall, Honeywell's series of control systems showcases their commitment to innovation and reliability in process automation, catering to the diverse needs of contemporary industrial environments. Each system is designed with specific features and capabilities that address the evolving challenges of process control, ensuring that users can achieve optimal performance and safety in their operations.