getting to grips with surveillance(102)

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MONITOR RADAR DISPLAY  Take-off: WIND SHEAR AHEAD, WIND SHEAR AHEAD Landing: GO AROUND, WIND SHEAR AHEAD 
The indications on PFD and ND are almost identical for Caution and Warning, except W/S AHEAD on PFD appears in red (refer to Figure 6-37 and Figure 6-38). A yellow sector with red arcs indicates the location of detected wind shears on ND. In case of a wind shear advisory (refer to Figure 6-18), only the ND indication is provided (no indication on PFD). 

4 This message indicates an overheating of the display unit. It is not a weather radar message. 5 With EIS1 display units, the message (Honeywell radar only) is displayed in the middle of ND. 6 This message is available with EIS 2 display units only.
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Figure 6-37: Wind shear alert on PFD  Figure 6-38: Wind shear alert on ND 

6.1.8. WEATHER RADAR CONTROLS
The flight crew is able to control four parameters in manual mode:
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The tilt angle: Angle between the beam center and the horizon,

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The gain: The sensitivity of the receiver,

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The ND range,

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The operating mode (WX, WX+T, WX/TURB, TURB, MAP, or PWS; manual or automatic if available).

Honeywell radar  Rockwell Collins radar 
Figure 6-39: Honeywell control panel with Autotilt function  Figure 6-40: Rockwell Collins control panel with Multiscan function 

Note: The layout and the content of the control panel may change according to the installed options. Refer to your FCOM for the control panel installed on your aircraft.

When tilting downward by 1°, the appearance of a cell at 80 NM means that the top of cell is located at 8 000 ft below the aircraft. Note that in the case of a cumulonimbus, it indicates the radar top.
6.2. OPERATIONAL RECOMMENDATIONS FOR WEATHER RADAR

Recommendations are also available in pilot’s guides from the weather radar manufacturers. See References.
6.2.1. WEATHER RADAR OPERATIONS
6.2.1.1. FOR THE AIRLINE
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Inform your flight and maintenance personnel about radiation hazards from the weather radar antenna.

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Train your flight crews to use the weather radar and to analysis and interpret weather returns properly and efficiently.

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Ensure a proper maintenance of weather radar components including the radome (e.g. check radome every C check). A faulty component may affect the sensitivity of the weather radar and then the weather indications on ND.

6.2.1.2. FOR THE FLIGHT CREW
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Periodically scan the weather vertically (tilt) and horizontally (ND range).

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Always return to automatic modes (gain and tilt) when the manual control is no longer necessary. The weather analysis should be done through a manual control, whereas the weather detection should be left to automatic modes.

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