Appendix G G.4.5 Relative Position to the Airplane.
The relative position and azimuth of the windshear threat with respect to the nose of the airplane should be displayed in an unambiguous manner.
G.4.6 Range.
The range selected by the flightcrew for the windshear display should allow the flightcrew to distinguish the windshear event from other information. Amber radial lines may be used to extend from the left and right radial boundaries of the icon extending to the upper edge of the display.
G.5 Safety Aspects.
G.5.1 Functional Hazard Assessment.
Both the loss of weather information and the display of misleading weather information should be addressed in the functional hazard assessment (FHA). In particular, the FHA should address failures of the display system that could result in the loss of the display and failures that could result in the presentation of misleading weather information.
G.5.2 Misleading Information.
The functional hazard assessment should address the effects of displaying misleading information. In accordance with chapter 4 of this AC, the display of misleading weather radar includes information that would lead the flightcrew to make a bad decision or introduce a potential hazard. Examples include—but are not limited to—storm cells displayed in the incorrect position, at the wrong intensity, or mis-registered in the case of a combined (e.g., fused) image.
G-5
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