(9)  
SSM 24-33-01 thru SSM 24-33-03

 (10)
 SSM 24-34-01 thru SSM 24-34-03

 C.
Access

 (1)  
Location Zone
 118 Electrical and Electronics Compartment, RH
 221 Control Cabin, LH
 222 Control Cabin, RH

 (2)  
Access Panel
 118A, Electrical Power Receptacle Door

 D.
Prepare for the Test

 S 085-034
 WARNING: YOU MUST CAREFULLY FOLLOW THE STEPS IN THE REFERENCED TASK TO
_______ PREPARE THE SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE SIMULATION. FAILURE TO FOLLOW THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF THE AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Do the "Prepare Safety-Sensitive Systems for Air Mode Simulation" task (AMM 32-09-02/201, par. 2).
 S 865-012
 CAUTION:_______DO NOT OPERATE THE APU DURING THIS TEST. TRANSIENTS CAN CAUSE AUTOSHUTDOWN AND DAMAGE TO THE PACKS AND APU.
 (2)  Supply external electrical power (AMM 24-22-00/201).
 NOTE: If you supply one external power source only, it is possible
____ that the SSB will open during the test. If the SSB opens, find the SPLIT SYSTEM BREAKER switch on the GEN FIELD MAN RESET module (P461 panel). Move the switch up, then down. This will close the SSB.
 S 715-038
 (3)  
Do a check of the indicator lights for the electrical system.

 (a)  
Make sure all the indicator lights for the electrical system on the P5 panel and the P461 panel come on.

 (b)  
Set the IND LTS switch to BRT.

 S 715-040
 (4)  
Make sure the BUS TIE 1, 2, 3, and 4 ISLN lights on the P5 panel are off.

 (a)
If an ISLN light is on, push the applicable BUS TIE switch.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 865-028
 CAUTION:_______DO NOT REMOVE UTILITY POWER. E/E RACK AND FLIGHT COMPARTMENT ELECTRONICS CAN BECOME TOO HOT IF THE COOLING FANS STOP.
 (5)  Remove the electrical loads that are not necessary on the airplane (i.e.: galleys, heat).
 NOTE: Smaller loads on the AC and DC buses will decrease the wear
____
 on the relay contacts during this test.

 S 865-016
 (6)  
Make sure the STORM switch on the P5 panel is set to OFF.

 S 865-036

 (7)  
Open this circuit breaker to remove power from the ground service bus for the dome lights in the flight compartment:

 (a)  
P6, Main Power Distribution Panel
 1) 6F24, FLT DK LIGHTS DOME

 S 715-018
 (8)  
Make sure the captain's dome lights are on.

 S 865-019

 (9)  
Make sure the IRS mode select switches, on the P5 panel, are set to OFF.

 S 865-020

 (10)
 Make sure the GND TESTS switch, on the P461 panel, is set to NORM.

 S 865-021
 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.
 (11)
 For the applicable engine, 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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-30-00
 ALL  ú ú 01 Page 504 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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