b) A WINDSHEAR SYS advisory EICAS message shows on the CDU. 3) In 9-12 seconds: a) GO AROUND, WINDSHEAR AHEAD, (pause) WINDSHEAR AHEAD, WINDSHEAR AHEAD is heard on the flight desk aural warning speakers. b) A red WINDSHEAR shows on the First Officer’s display unit (DU). 4) After 15 seconds: a) Make sure the weather radar test display on the First Officer’s display unit (DU) has a multi-colored displayed.
(q)  Set the ‘‘L/R’’ switch on the WXR Control Panel to the Right (in) position to test the Right WXR R/T.
NOTE: NOTE: The ‘‘L/R’’ switch on the Control Panel switches between the Left and Right Transceivers
(r)  
Push the WXR power switch on the First Officer’s EFIS control panel to ON position.

(s)  
Put the mode selector switch on the WXR control panel to the TEST position.

(t)  
Make sure these indications occur:

NOTE: All times are approximate.
1)  In 0-3 seconds: a) An amber WINDSHEAR shows on the First Officer’s display unit (DU). b) The aural message MONITOR RADAR DISPLAY is heard on the flight desk warning
speakers.

2)  In 3-9 seconds:
a) A PWS FAIL message shows ON the First Officer’s display unit (DU).
b) A WINDSHEAR SYS advisory EICAS message shows on the CDU.

3) In 9-12 seconds: a) GO AROUND, WINDSHEAR AHEAD, (pause) WINDSHEAR AHEAD, WINDSHEAR AHEAD is heard on the flight desk aural warning speakers. b) A red WINDSHEAR shows on the First Officer’s display unit (DU). 4) After 15 seconds: a) Make sure the weather radar test display on the First Officer’s display unit (DU) has a multi-colored displayed.
(u)  
Set the SOURCE switch on the instrument switching module to the AUTO position.

(v)  
Make sure the test pattern stays on the Captain’s and First Officers display unit (DU).

(w)  
Push the WXR switch on the Captain’s EFIS control panel to the OFF position.

NOTE: These steps make sure the correct operation of the WXR power switch on the First Officer’s EFIS control panel. 1) Make sure the weather radar data on the Captain’s DU is removed. 2) Make sure the test pattern stays on the First Officer’s DU.
(x)  Push the WXR switch on the Captain’s EFIS control panel to the ON position. 1) Make sure that WXR FAIL does not show on the Captain’s or First Officer’s DU.
EFFECTIVITY SIL ALL  34-43 TASK 801 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 206 Jun 15/2010 

737-600/700/800/900 FAULT ISOLATION MANUAL SIL 014, 015, 020 (Continued)
2)  If WXR FAIL shows on the Captain’s or First Officer’s DU, then refer to the applicable Maintenance Message Index to find the fault isolation task.
SIL ALL
-------------------------END OF TASK ---------------------------
LRU/SYSTEM  MAINTENANCE MESSAGE  GO TO FIM TASK 
WEATHER RADAR  ANT FAULT  34-43
TASK
803
 
WEATHER RADAR  CON FAULT  34-43
TASK
804
 
WEATHER RADAR  COOLING FAULT  34-43
TASK
805
 
WEATHER RADAR  NO AIR DATA IN  34-43
TASK
806
 
WEATHER RADAR  NO ATTITUDE IN  34-43
TASK
806
 
WEATHER RADAR  NO HEADING INPUT  34-43
TASK
806
 
WEATHER RADAR  NO RAD ALT  34-43
TASK
807
 
WEATHER RADAR  R/T FAULT  34-43
TASK
802
 
　
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