曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
The output generated for a windshear advisory alert is a windshear
icon on the display.
N NOTE
Windshear advisory alerts are deactivated for all new Boeing
production aircraft.
N NOTE
If the display is turned off, there will be no windshear advisory
alert due to the fact that there are no aural alerts associated with
windshear advisories.
1st Edition, 1st Revision
18 Sep 03 4-51
MULTISCAN OPERATION COLLINS
MultiScan Automatic Operation MultiScan™ Radar
PWS (PREDICTIVE WINDSHEAR) – AIRBUS ONLY
Airbus: The PWS switch allows the flight crew to disable automatic
operation of the windshear mode by selecting the OFF position. The
AUTO position allows windshear mode to function automatically during
the takeoff and landing phases of flight.
Figure 4-52 Airbus PWS Control
N NOTE
A further discussion of windshear is available in the chapters
AVIATION WEATHER and HOW RADAR WORKS.
TEST
TEST – AIRBUS AIRCRAFT
Airbus: System test is activated through the CFDS (Centralized Fault
Display Unit). The TEST function and step by step instructions are
available on the main radar menu on the MCDU.
1st Edition, 1st Revision
4-52 18 Sep 03
COLLINS MULTISCAN OPERATION
MultiScan™ Radar MultiScan Automatic Operation
TEST – BOEING AIRCRAFT
Boeing: System test is activated by pressing the TEST button on the
radar control panel. Alternately, the test procedure can be initiated
through the Central Maintenance Computer (CMC) on the B747 or the
Maintenance Access Terminal (MAT) on the B777 (refer to aircraft
documentation for use of the CMC or MAT).
Figure 4-53 Boeing TEST Control
In either case, the following test procedures should be followed:
1. Select a non-test mode on the radar control panel.
2. Select WXR to ON from the EFIS control panel. N NOTE
If TEST mode has been previously selected on the radar control
panel (i.e., Step 1 above has not been accomplished) and WXR is
selected to ON from the EFIS control panel, aural warnings will be
inhibited. In other words, the radar will conduct a silent self test.
1st Edition, 1st Revision
18 Sep 03 4-53
MULTISCAN OPERATION COLLINS
MultiScan Automatic Operation MultiScan™ Radar
N NOTE
Aural and visual windshear test annunciations are inhibited when
the radar is in the automatic windshear mode (below 2,300 feet
during takeoff and landing, and windshear qualifier logic has been
met (♦page 6-35). When TEST is selected and the aircraft is in the
automatic windshear mode, a silent self test will be performed. Only
the “rainbow” self test pattern on the display will show (figure 4-54).
3. Press TEST on the radar control panel. The following should be
observed when on the ground and windshear qualifier logic has not
been met :
• Approximately 0-6 Seconds - The amber windshear caution light will
illuminate and the aural message “MONITOR RADAR DISPLAY”
will be heard.
• Approximately 6-9 Seconds - The Master Warning Light illuminates
(when applicable). The windshear fail message is displayed in the
flight deck.
• Approximately 9-12 Seconds - The red windshear warning light will
illuminate and the aural message “GO AROUND, WINDSHEAR
AHEAD, WINDSHEAR AHEAD, WINDSHEAR AHEAD” will be heard.
During this time period the rainbow (with embedded windshear icon)
self-test pattern (figure 4-54) will show. N NOTE
The self-test pattern will remain displayed until the test mode is
deselected.
4. If a system fault occurs, a flashing tilt code will show to indicate
the system component that requires maintenance (refer to the table
on page 4-56).
N NOTE
The flashing tilt code feature can be a useful tool for isolating
intermittent faults during flight. If the crew notices that the windshear
unavailable lamp is activated, they can select TEST and record the
tilt code in order to assist ground personnel with trouble shooting.
5. If a dual R/T system is installed, conduct the test sequence for
system 1 as described above. Then deselect TEST, switch to system 2
and reselect TEST. The test sequence will proceed as described above.
1st Edition, 1st Revision
4-54 18 Sep 03
COLLINS MULTISCAN OPERATION
MultiScan™ Radar MultiScan Automatic Operation
N NOTE
If system 2 is selected without first deselecting TEST, aural and
visual windshear annunciations will be inhibited. N NOTE
If TEST is deselected before the automatic test sequence is
completed the aural message radar test terminated will be initiated. N NOTE
Refer to the Component Maintenance Manual (CMM) for full details.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：
Collins Weather Radar operator’s guide(20)
