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A
737-300/400/500MAINTENANCE MANUAL
 BUS PROTECTION PANEL - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task is the removal of the bus protection panel (BPP). The second task is the installation of the BPP. After the installation, there is an operational test of the BPP.
 B.  The BPP controls and monitors the external power. A cam-lock handle holds the BPP in the P6 panel.
 TASK 24-41-21-024-001
 2.  Bus Protection Panel Removal
____________________________
 A.  References
 (1)  
AMM 20-10-07/201, Electrical/Electronic Black Box

 (2)  
AMM 24-22-00/201, Manual Control

 B.  
Access

 (1)  
Location Zone 101 Left Control Cabin - P5 forward overhead panel 102 Right Control Cabin - P6 load control center panel

 C.  
Procedure

 S 864-010
 CAUTION: MAKE SURE THAT NONE OF THE AC OR DC BUSES ARE ENERGIZED WHEN
_______ YOU REMOVE THE BPP. ELECTRICAL POWER DURING BPP REMOVAL CAN CAUSE DAMAGE TO THE BPP.
 (1)  Make sure that no electrical power is on the airplane (AMM 24-22-00/201).
 (a)  
Make sure that the GEN and APU GEN switches on the P5-4 panel are in the OFF position.

 (b)  
Make sure that the BAT switch on the P5-13 panel is in the OFF position.

 (c)  
Make sure that the external power cable is disconnected or not energized.

 S 024-003
 (2)  Remove the BPP (black box unit with cam-lock handles) (AMM 20-10-07/201).
 TASK 24-41-21-424-004
 3.  Bus Protection Panel Installation
_________________________________
 A.  Standard Tools and Equipment
 (1)
External Power Supply - 115/200 volts ac, 3-phase, 400 Hz

 B.  
References

 (1)  
AMM 20-10-07/201, Electrical/Electronic Black Box

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 C.

D.
E.
A
737-300/400/500MAINTENANCE MANUAL
 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 24-41-00/101, AC External Power

 (4)
IPC 24-50-00, Figure 60LAccess

 (1)  
Location Zone 101 Left Control Cabin - P5 forward overhead panel 102 Right Control Cabin - P6 load control center panel 115 Cargo Door - P13 forward attendant's panel 202 Lower Nose Compartment - P19 external power panel 402 Right Wing - outboard leading edge

 (2)  
Access Panels 1101 External Power Receptacle Door 6540 Refueling Station Access Door

Procedure
 S 864-011
 CAUTION: MAKE SURE THAT NONE OF THE AC OR DC BUSES ARE ENERGIZED WHEN
_______ YOU INSTALL THE BPP. ELECTRICAL POWER DURING BPP INSTALLATION CAN CAUSE DAMAGE TO THE BPP.
 (1)  Make sure that no electrical power is on the airplane (AMM 24-22-00/201).
 (a)  
Make sure that the GEN and APU GEN switches on the P5-4 panel are in the OFF position.

 (b)  
Make sure that the BAT switch on the P5-13 panel is in the OFF position.

 (c)  
Make sure that the external power cable is disconnected or not energized.

 S 544-006
 (2)  
If they are installed, remove the protective covers from the BPP and the shelf in the P6 panel.

 S 424-007

 (3)  
Install the BPP (black box unit with cam-lock handles) (AMM 20-10-07/201).

 S 864-019

 (4)  
Turn the DC meter switch on the P5-13 panel to BAT.

 (a)
Make sure that the DC voltmeter shows 24 | 4 volts.Make Sure That the Bus Protection Panel Operates Correctly.

 (1)  
Make sure the access door for the refueling station is closed.

 S 414-012
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 24-41-21
 ALL  ú ú 01 Page 402 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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本文鏈接地址：737-300 400 500 AMM 飛機(jī)維護(hù)手冊(cè) 電源 ELECTRICAL POWER(163)