S 865-045
 (5)  
Make sure the IRS mode select switches, on the P5 panel, are set to OFF.

 (6)  
Make sure the GND TESTS switch, on the P461 panel, is set to NORM.

 S 865-046
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 S 865-047
 WARNING: MAKE SURE TO OPEN THE APPLICABLE ENGINE IGNITION CIRCUIT
_______ BREAKERS BEFORE YOU DO THE TEST. THE IGNITER PLUGS CAN AUTOMATICALLY FIRE IF YOU DO NOT OPEN THE CIRCUIT BREAKERS. WITH FUEL IN THE COMBUSTION CHAMBER, AN INTERNAL ENGINE OR TAILPIPE FIRE CAN OCCUR. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO THE ENGINE.
 (7)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6, Main Power Distribution Panel
 1) 6F1, IGN 1 ENG 1
 2) 6K19, IGN 2 ENG 1
 3) 6G19, STBY IGN ENG 1
 4) 6F2, IGN 1 ENG 2
 5) 6K20, IGN 2 ENG 2
 6) 6G20, STBY IGN ENG 2
 7) 6F3, IGN 1 ENG 3
 8) 6K21, IGN 2 ENG 3
 9) 6G21, STBY IGN ENG 3
 10) 6F4, IGN 1 ENG 4
 11) 6K22, IGN 2 ENG 4
 12) 6G22, STBY IGN ENG 4

 S 865-007
 (8)  
Make sure the BATTERY switch, on the P5 panel, is set to ON.

 S 865-008

 (9)  
Set the STANDBY POWER switch, on the P5 panel, to AUTO.

 S 715-140

 (10)
 Make sure that data shows on the upper and lower EICAS screens.

 S 715-142

 (11)
 Make sure that data shows on all the screens for the primary flight display (PFD) and the navigation display (ND).

 D. Do the Operational Test for the Main Static Inverter
 S 865-013
 (1)  
Set the STANDBY POWER switch to OFF.

 S 715-073

 (2)  
Examine the EICAS screens.

 (a)  
Make sure that data shows on the lower EICAS screen.

 (b)  
Make sure that data does not show on the upper EICAS screen.

 (3)  
Set the STANDBY POWER switch to AUTO.

 S 865-071
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747-400 MAINTENANCE MANUAL
 (4)  S 865-014Push the EXT PWR 1 and 2 switches, on the P5 panel, to remove electrical power from the airplane. (a) Make sure the ON lights on the EXT PWR 1 and 2 switches go off.
 (5)  S 215-117Examine the EICAS screens. (a) Make sure that data shows on the upper EICAS screen. (b) Make sure that data does not show on the lower EICAS screen.
 (6)  S 865-017Set the STANDBY POWER switch to BAT.
 (7)  S 715-074Examine the EICAS screens. (a) Make sure that data shows on the upper EICAS screen. (b) Make sure that data does not show on the lower EICAS screen.
 (8)  S 865-023Set the STANDBY POWER switch to AUTO.
 (9)  S 865-024Push the EXT PWR 1 and 2 switches to supply electrical power to the airplane. (a) Make sure the ON lights on the EXT PWR 1 and 2 switches come on.

 S 715-025
 (10)
 Make sure that data shows on the upper and lower EICAS screens.

 S 865-072

 (11)
 Open these circuit breakers:

 (a)  
P6, Main Power Distribution Panel 1) 6J7, MN BAT RELAY CONT 2) 6A25, XFR RELAY STBY

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 S 715-028
 (12)
 Make sure that data shows on the upper and lower EICAS screens.
　
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