Safety

H155
Enhanced Ground Proximity Warning System (EGPWS)
SB number : EC155-34-40-04 (R00)
Applicable to version(s) : B, B1
The EGPWS (Enhanced Ground Proximity Warning System) Honeywell MK XXII is a TAWS (Terrain Awareness and Warning System) which helps to prevent accidents caused by Controlled Flight into Terrain (CFIT). The system achieves this objective by accepting a variety of aircraft parameters as inputs, applying alerting algorithms, and providing the flight crew with aural alert messages, visual annunciations and displays in the event that the boundaries of any alerting envelope are exceeded.
The system is composed by:
- EGPWC (Enhanced Ground Proximity Warning Computer) MKXXII V24 that contains a Global Positioning System (GPS) receiver which provides GPS information.
- Smart Cable Loader : Allows loading the software and Terrain and Obstacle Databases using the computer PCMCIA interface.
- Control Box : Controls the EGPWC and indicates system status message.
- Caution Warning lights : The "Caution Terrain" annunciator is entitled "TAWS" and it is amber. The "Warning Terrain" annunciator is called "TAWS" and it is red.
- Display (TRA45) : Provide the pilot with easily interpreted information about terrain/obstacles relative to the aircraft, and thus increase the pilot's Situational Awareness.The color and intensity of the terrain displayed instantaneously alerts the pilots to dangerous areas, according to a color code.
- GPS Antenna Duplexer : The GPS antenna is shared with an existing GPS installation.
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+4.16 kg

+15.31 m.kg

4 day(s)

Benefits

  • Real-time data-based situational awareness display of surrounding terrain and obstacles in relation to the helicopter’s altitude and flight path.
  • Visual and audible warning system factoring in terrain, man-made obstacles and other primary scenarios associated with Controlled Flight Into Terrain (CFIT) risks.

PRE-POST REQUISITE / EFFECTIVITY

Not Applicable.

INSTALLATION TIME
QUALIFICATION INSTALLATION DURATION
Airframe, Systems 14 Hour(s)
Avionics, Electrical 14 Hour(s)

ADDITIONAL INFORMATION : - The warnings are typically installed on both sides of the instrument panel. - The display TRA45A display is installed, it can be installed on the pedestal. - The control box is typically installed on the pedestal. - The EGPWCSand the duplexer if installed are typically located in the tail of the helicopter. - The GPS antenna is typically mounted on the tail fin.

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CONFIGURATION MATRIX
CONFIGURATION PRE-POST MOD STATUS  
1 Equipped with mapping system KMD850, PRE MOD 365R001053.00 This is my configuration
2 PRE MOD 365R001053.00, Equipped with AVAD, Equipped with mapping system KMD850 This is my configuration
3 PRE MOD 365R001053.00, Equipped with TCAS, Equipped with mapping system KMD850 This is my configuration
4 Equipped with AVAD, Equipped with mapping system KMD850, PRE MOD 365R001053.00, Equipped with TCAS This is my configuration
5 PRE MOD 365R001053.00 This is my configuration
6 Equipped with AVAD, PRE MOD 365R001053.00 This is my configuration
7 PRE MOD 365R001053.00, Equipped with TCAS This is my configuration
8 Equipped with TCAS, PRE MOD 365R001053.00, Equipped with AVAD This is my configuration

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