(e)
PWS/AUTO/OFF switch (item 2) In AUTO position, the windshear detection is automatic if altitude is lower than 2300 ft and qualifiers A and B are valid. This automatic operation can be inhibited when the switch is in the OFF position.
R 1EFF : 301-399, 401-499, 1 34-41-00Page 67 1 1 Config-3 Aug 01/05 1 1 1CES 1
(f) Ground clutter suppression (item 4) Activation of the GND CLTR SPRS switch, in weathers modes (WX, WX+T, TURB), reduces the intensity of the ground clutter. These ground returns are replaced by black areas on the radar image when the GND CLTR SPRS switch is placed in ON position.
**ON A/C ALL
(3) Utilization of the EFIS control sections and lighting/LOUDSPEAKER control panels (Ref. Fig. 012)
(a)
Mode selector switch (item 1) This mode selector switch enables the image display on the corresponding ND whenever the ARC or ROSE mode is selected and the transceiver is supplied. In that case, the radar image is displayed in the background of the navigation image. If neither ROSE or ARC mode is selected, the message W/S CHANGE MODE is shown on both NDs, if there is a windshear alert. The pilot is advised to select ARC or ROSE mode to see the W/S icon. The color depends on the W/S alert level.
(b)
Scale selector switch (item 2) This selector switch enables the display of the range selected for an optimum use of the radar image on the corresponding ND. For each of the following ranges: 10, 20, 40, 80, 160 and 320, four concentric range arcs are displayed respectively spaced 2.5, 5, 10, 20, 40 and 80 NM, when the mode selector switch is in the ARC position. Only 2 range arcs are displayed in the ROSE mode. Windshear information is presented in the 10 NM range only. If a windshear alert is generated but the selected range is greater than 10 NM, the message W/S: SET RNG 10 NM is shown on the NDs. In this case, the pilot is advised to select the 10 NM range. The color depends on the W/S alert level.
(c)
Radar image brightness control (item 3) The ND potentiometer enables the adjustment of brightness and contrast of radar echoes in relation to the navigation image, which is superimposed. However, the adjustment range does not allow total extinction of the image. The OFF position of the potentiometer corresponds to the minimum brightness. The BRT position corresponds to the maximum brightness.
R 1EFF : ALL 1 34-41-00Page 68 1 1 Config-3 May 01/05 1 1 1CES 1
EFIS Control Sections and EFIS Switching Panels
Figure 012
R 1EFF : ALL 1 34-41-00Page 69 1 1 Config-3 May 01/05 1 1 1CES 1 NOTE : A photoelectric cell associated with each ND also adjusts
____ image brightness as a function of ambient light variations.
(4) Weather radar data displayed on the NDs
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
(Ref. Fig. 013)
**ON A/C 106-149,
(Ref. Fig. 013A)
R **ON A/C 303-399, 401-499,
(Ref. Fig. 013B)
**ON A/C ALL
On the figure, the details A) and B) respectively correspond to the ARC and ROSE ND modes for which the display of the radar image is possible. Messages inform the crew of the tilt angle and gain selected on the weather radar control unit. Other messages indicate the failures which affect the operation of the radar system. All these messages are displayed in the R lower corner of each ND whenever a radar image is selected.
NOTE : Tilt information and gain selection are displayed on the ND
____ when no failure warning message is generated, or when the TEST mode is not selected.
The various failures which can affect the radar image are listed in decreasing order of importance. If several failures occur, only the most important one is displayed (Ref. details C) and D) on the figure).
1EFF : ALL 1 34-41-00Page 70 1 1 Config-3 Aug 01/05 1 1 1CES 1
Weather radar - Data Displayed on the NDs
Figure 013
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 34-41-00Page 71 1201-299, 301-302, 1Config-3 May 01/05 1 1 1CES 1R Weather radar - Data Displayed on the NDs R Figure 013A
R 1EFF : 106-149, 1 34-41-00Page 72 1 1 Config-3 May 01/05 1 1 1CES 1
Weather radar - Data Displayed on the NDs
Figure 013B
R 1EFF : 303-399, 401-499, 1 34-41-00Page 73 1 1 Config-3 Aug 01/05 1 1 1CES 1 Two types of failures can affect the radar system:
(a) Failures which result in the loss of the radar image The corresponding messages are displayed in red
-
WR : indicates a failure of the weather radar transceiver R/T
-
WR : indicates a failure of the weather radar antenna ANT
-
WR : indicates a failure of the weather radar control unit CTL
-
WR : indicates an error of comparison between the range
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