24-22-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-022
WARNING:_______ TURN OFF THE EXTERNAL ELECTRICAL POWER SOURCE BEFORE YOU PUT
THE POWER CABLES INTO THE AIRPLANE RECEPTACLES. ELECTRICAL
ARCS CAN CAUSE INJURIES.
(2) Connect the power cables to the external power receptacles No. 1 (D51) and No. 2 (D52) on panel P36.
NOTE: If only one external power source is available, connect
____ the power cable to receptacle No. 1 (D51).
S 864-023
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS BEFORE YOU TURN THE POWER ON. THE FLAPS CAN AUTOMATICALLY MOVE WHEN YOU SUPPLY ELECTRICAL POWER.
CAUTION: THE BATTERY SWITCH MUST BE OFF WHEN ELECTRICAL POWER IS REMOVED
_______ FROM THE AIRPLANE. IF THE BATTERY SWITCH IS ON WITH NO AC POWER ON THE AIRPLANE, THE BATTERIES CAN BECOME DISCHARGED. THE APU WILL NOT START IF THE APU BATTERY IS DISCHARGED.
(3)
Set the BATTERY switch, on the P5 overhead panel, to ON.
S 864-024
(4)
Set the STANDBY POWER switch to AUTO.
S 864-025
(5)
Apply electrical power to the external power cables.
S 214-026
(6)
Make sure that the AVAIL lights on the EXT PWR 1 and 2 switches are on.
S 214-027
(7)
Make sure that the DRIVE lights on the DRIVE DISC 1, 2, 3, and 4 switches are on.
S 864-028
(8)
Set the BUS TIE 1, 2, 3, and 4 switches to ISLN.
S 214-029
(9)
Make sure that the ISLN lights on the BUS TIE 1, 2, 3, and 4 switches are on.
S 864-030
(10)
Set the BUS TIE 1, 2, 3, and 4 switches to AUTO.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 214-031
(11)
Make sure that the ISLN lights on the BUS TIE 1, 2, 3, and 4 switches are off.
S 864-032
(12)
Push the EXT PWR 1 and 2 switches.
S 214-033
(13)
Make sure that the ON lights on the EXT PWR 1 and 2 switches are on.
S 864-034
(14)
Get access to the maintenance page for the electrical system (AMM 45-10-00/201).
S 864-035
(15)
Set the L UTILITY switch to OFF.
S 214-036
(16)
Make sure that the utility buses No. 1 and 2 show in amber on the maintenance page for the electrical system.
S 864-037
(17)
Set the L UTILITY switch to ON.
S 214-038
(18)
Make sure that the utility buses No. 1 and 2 show in green on the maintenance page for the electrical system.
S 864-039
(19)
Set the R UTILITY switch to OFF.
S 214-040
(20)
Make sure that the utility buses No. 3 and 4 show in amber on the maintenance page for the electrical system.
S 864-041
(21)
Set the R UTILITY switch to ON.
S 214-042
(22)
Make sure that the utility buses No. 3 and 4 show in green on the maintenance page for the electrical system.
(23)
Set the GEN CONT 1, 2, 3, and 4 switches to OFF.
S 214-044
(24)
Make sure the FIELD OFF lights on GEN FIELD MAN RESET switches 1, 2, 3, and 4 on the P461 panel are on.
S 864-043
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