(b)  
The R position for the WXR-R test.

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747-400
MAINTENANCE MANUAL

 S 865-214

 WARNING:_______ DO NOT OPERATE THE WEATHER RADAR WHILE FUEL IS ADDED OR REMOVED
 FROM THE AIRPLANE.  DO NOT TRANSMIT RF ENERGY WHILE FUEL IS
 ADDED OR REMOVED IN AN AREA 200 FEET OR LESS OF THE ANTENNA.
 THIS CAN CAUSE AN EXPLOSION.
 DO NOT OPERATE THE WEATHER RADAR IN A HANGAR OR OTHER
 ENCLOSURE.  MAKE SURE NO PERSONS ARE IN THE AREA 15 FEET OR
 LESS FROM THE ANTENNA WHEN IT TRANSMITS RF ENERGY.  RF ENERGY

 CAN CAUSE INJURY TO PERSONS.
 (5)  
AIRPLANES WITHOUT PREDICTIVE WINDSHEAR ACTIVE; Set the mode selector switch on the WXR control panel to the WX position.

 S 865-275

 (6)  
AIRPLANES WITH PREDICTIVE WINDSHEAR ACTIVE; Set the mode selector switch on the WXR control panel to the TEST position.

 S 865-209

 (7)  
Align the Left, Right, and Center IRUs in the NAV mode (AMM 34-21-00/201).

 (a)  Make sure the ATT flags on the captain's and the first officer's PFDs are not in view.
 S 865-120
 (8)  
Set the captain's EIU switch to the AUTO position.

 S 865-208

 (9)  
Set the first officer's EIU switch to the AUTO position.

 S 865-118

 (10)
 Prepare the CDU for the ground test:

 (a)  
Push the MENU key on the CDU to show the MENU.

 (b)  
Push the line select key (LSK) that is adjacent to <CMC to show the CMC MENU.

 (c)  
If <RETURN shows after you push the LSK, push the LSK that is adjacent to <RETURN until you see the CMC MENU.

 (d)  
Push the LSK that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.

 (e)  
Push the NEXT PAGE key until you find <34 NAVIGATION RADIOS.

 (f)  
Push the LSK that is adjacent to <34 NAVIGATION RADIOS to show the GROUND TESTS menu for the navigation radios system.

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 (g) Push the NEXT PAGE key until you find <WXR-L or <WXR-R.
 NOTE: If INHIBITED shows above <WXR-L or WXR-R, the test will
____
 not operate.

 (h)  If INHIBITED shows above <WXR-L or <WXR-R: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU. 3) Push the LSK that is adjacent to <RETURN to show the ground
 test menu again.
 E.  AIRPLANES WITHOUT PREDICTIVE WINDSHEAR ACTIVE; Weather Radar Ground Test
 S 745-119
 (1)  Push the LSK that is adjacent to the applicable prompt (<WXR-L or <WXR-R).
 (a)  
When the TEST PRECONDITIONS page shows, make sure each instruction on the page is completed. (Push the NEXT PAGE key to see the subsequent pages.)

 (b)  
Push the LSK that is adjacent to START TEST>.

 NOTE: IN PROGRESS shows during the test.
____
 S 745-173
 (2)  When IN PROGRESS goes out of view look for PASS or FAIL> adjacent to <WXR-L or<WXR-R.
 NOTE: If a PASS indication shows, no failure ocurred during
____
 the test.

 (a)  If FAIL> shows: 1) Push the LSK that is adjacent to FAIL> to see the GROUND TEST MSG pages for the failure.
 2)  Push the NEXT PAGE key until you find all the GROUND TEST MSG pages.
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