(a)  Make sure the ATT flags on the captain's and the first officer's PFDs are not in view.
 S 865-276
 (5)  AIRPLANES WITH PREDICTIVE WINDSHEAR ACTIVE; Normal operation of these systems are necessary for this task.
 (a)  
AMM 31-51-00, Modular Avionics Warning Electronics Assembly

 (b)  
AMM 31-61-00, EFIS/EICAS Interface Unit

 (c)  
AMM 34-12-00, Air Data System

 (d)  
AMM 34-33-00, Radio Altimeter System

 (e)  
AMM 34-45-00, Traffic Alert and Collision Avoidance System

 (f)  
AMM 34-46-00, Ground Proximity Warning System

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747-400 MAINTENANCE MANUAL
 S 715-069
 (6)  Do an Operational Test for the weather radar system.
 F.  EIU Switching Test
 S 735-090
 (1)  Do an EIU switching test.
 (a)  
Set the WXR switch/indicator on each of the EFIS control panels to the on position.

 (b)  
Set the WXR control panel to the TEST position.

 1)  Make sure the two ND weather radar self-test displays are as follows (Fig. 501): a) The test pattern shows. b) The WXR message shows on the top line. c) The TEST message shows on the bottom line.

 (c)  
Set the EIU switch on the captain's source select module to the L position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message show on the bottom line.

 (d)  
Set the EIU switch on the captain's source select module to the C position. 1) Make sure the two both ND weather radar self-test displays

 are as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

 (e)  
Set the EIU switch on the captain's source select module to the R position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

 (f)  
Set the EIU switch on the captain's source select module to the AUTO position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

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747-400 MAINTENANCE MANUAL
 (g)  
Set the EIU switch on the first officer's source select module to the L position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501) :
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

 (h)  
Set the EIU switch on the first officer's source select module to the C position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

 (i)  
Set the EIU switch on the first officer's source select module to the R position. 1) Make sure the two ND weather radar self-test displays are

 as follows (Fig. 501):
 a) The test pattern shows.
 b) The WXR message shows on the top line.
 c) The TEST message shows on the bottom line.

 (j)  
Set the EIU switch on the first officer's source select module to the AUTO position. 1) Make sure the two ND weather radar self-test displays are
　
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