on.

 (f)  
Make sure the NOT IN USE light on the external power panel, P30, is off.

 (g)  
Make sure the CONNECTED light on the external power panel, P30, is on.

 (h)  
Push the two BUS TIE switches on the electrical system control panel to the AUTO position.

 (i)  
Make sure the AUTO light in each BUS TIE switch is on.

 (j)  
Make sure the left and right BUS OFF lights on the electrical system control panel are off.

 (k)  
Make sure these HOT BUS WARNING lights are on:

 1)  The AC TIE BUS and L 115 AC lights on the left generator power panel, P31.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-41-00
 ALL  ú ú 01 Page 502 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 2) The AC TIE BUS and R 115 AC lights on the right generator power panel, P32. 3) The AC TIE BUS and EXT PWR lights on the APU/external power panel, P34. 4) The 115 V AC GND SVCE BUS light on the right miscellaneous electrical equipment panel, P37.
 (l)  
Push the right BUS TIE switch on the electrical system control panel to the ISLN position. 1) Make sure the yellow ISLN light in the switch comes on. 2) Make sure the right BUS OFF light comes on. 3) Make sure the EICAS messages, R AC BUS OFF and RIGHT BUS

 ISOLATED, show on the top display.

 (m)  
Push the right BUS TIE switch on the electrical system control panel to the AUTO position.

 (n)  
Push the left BUS TIE switch on the electrical system control panel to the ISLN position. 1) Make sure the yellow ISLN light in the switch comes on. 2) Make sure the left BUS OFF light comes on. 3) Make sure the EICAS messages, L AC BUS OFF and LEFT BUS

 ISOLATED, show on the top display.

 (o)  
Push the left BUS TIE switch to the AUTO position.

 (p)  
Push the ELEC HYD switch on the EICAS MAINT panel on the right side panel, P61.

 (q)  
Make sure these values show below GND PWR on the bottom EICAS display:

 AC-V 115 |5
 FREQ 400 |20
 F. Put the Airplane Back To Its Usual Condition
 S 865-011
 (1) Push the EXT PWR switch on the electrical system control panel.
 (a) Make sure the white ON light in the switch goes off.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-41-00
 ALL  ú ú 01 Page 503 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 865-012
 WARNING: REMOVE ELECTRICAL POWER FROM THE POWER CABLE BEFORE YOU REMOVE
_______
 THE CABLE FROM THE AIRPLANE. AN ELECTRICAL ARC CAN OCCUR
 WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

 (2)  Remove electrical power from the external power cable.
 (a)  
Remove the external power cable from the airplane.

 (b)  
Close the access door for the external power panel, P30.

 S 865-013
 (3)  Push the BAT switch on the pilots' overhead panel, P5, to the OFF position.
 (a)  Make sure the OFF light in the BAT switch comes on.
 S 445-014
 (4)  Do the activation procedure for the spoilers if you did the deactivation procedure (AMM 27-61-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 24-41-00
 ALL  ú ú 01 Page 504 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 EXTERNAL POWER CONTACTOR - REMOVAL/INSTALLATION
_______________________________________________
 1.  General_______
 A.  The external power contactor, K114 (referred to as the contactor) is in the APU/external power panel, P34, in the main equipment center.
 TASK 24-41-01-004-001
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 電源 ELECTRICAL POWER 2(73)