(a)  P7 Circuit Breaker Panel
 1) A14 ADC R PWR

 S 865-149
 (46)
 Enter E/002/350/00.

 S 865-150

 (47)
 Open this circuit breaker:

 (a)  P7 Circuit Breaker Panel
 1) F09 EIU L

 S 755-151
 (48)
 Make sure that bit 24 is set to "1".

 S 865-152

 (49)
 Close this circuit breaker:

 (a)  P7 Circuit Breaker Panel
 1) F09 EIU L

 S 865-153
 (50)
 Enter E/002/354/00.

 S 865-154

 (51)
 Open this circuit breaker:

 (a)  P7 Circuit Breaker Panel
 1) F15 EIU R

 (52)
 Make sure that bit 15 is set to "1".

 S 865-156

 (53)
 Close this circuit breaker:

 (a)  P7 Circuit Breaker Panel
 1) F15 EIU R

 (54)
 Enter E/002/350/00.

 S 755-155
 S 865-157
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MAINTENANCE MANUAL

 S 865-158
 (55) Open this circuit breaker:
 (a)  P7 Circuit Breaker Panel
 1) A06 MMR L

 S 755-159
 (56)
 Make sure that bit 16 is set to "1".

 S 865-160

 (57)
 Close this circuit breaker:

 (a)  P7 Circuit Breaker Panel
 1) A06 MMR L

 S 865-161
 (58)
 Enter E/002/350/00.

 S 865-162

 (59)
 Open these circuit breakers:

 (a)  P7 Circuit Breaker Panel
 1) A01 MAWEA PWR A
 2) B01 MAWEA PWR B

 S 755-163
 (60)
 Make sure that bits 19 and 20 are set to "1".

 S 865-164

 (61)
 Close these circuit breakers:

 (a)  P7 Circuit Breaker Panel
 1) A01 MAWEA PWR A
 2) B01 MAWEA PWR B

 L. Terrain Override and Switching Test
 S 865-173
 (1)  
Set the TERR switches on the captain's and first officer's EFIS control panels to the off position.

 S 865-174

 (2)  
Make sure the TERR OVRD switch on the P3-4 panel is in the off position.

 S 865-175

 (3)  
Set the WXR switches on the captain's and first officer's EFIS control panels to the on position.

 (a) Make sure terrain data does not show on the ND's.
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747-400 MAINTENANCE MANUAL
 S 865-176
 (4)  Set the TERR switch on the captain's EFIS control panel to the on position. (a) Make sure the terrain display data shows on the captain's ND. (b) Make sure the TERR message shows on the captain's ND.
 S 865-177
 (5)  Set the TERR switch on the first officer's EFIS control panel to the on position. (a) Make sure the terrain display data shows on the first officer's ND.
 (b)  Make sure the TERR message shows on the first officer's ND.
 S 865-178
 (6)  Set the TERR OVRD switch to the on position. (a) Make sure OVRD shows on the switch. (b) Make sure the terrain display data does not show on the ND's. (c) Make sure the TERR OVRD message shows on the ND's. (d) Make sure the TERR OVRD (Advisory) message shows on the main EICAS display.
 S 865-179
 (7)  Set the TERR OVRD switch to the off position. (a) Make sure OVRD does not show on the switch. (b) Make sure the terrain display data shows on the ND's. (c) Make sure the TERR OVRD message does not show on the ND's. (d) Make sure the TERR OVRD (Advisory) message does not show on the main EICAS display.
 S 865-180
 (8)  Open this circuit breaker: (a) P7 Circuit Breaker Panel 1) D06 TERR DSPL
　
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