B.
References
(1)
24-21-00/101, AC Generation System
(2)
24-21-41/401, Main Power Circuit Breakers
(3)
24-22-00/201, Manual Control
(4)
24-31-00/101, DC Generation System
(5)
24-41-11/601, External Power Receptacle
(6)
24-41-21/401, Bus Protection Panel
(7)
WDM 24-41-11, 24-41-12, 24-41-13
(8)
SSM 24-40-01, 24-40-02
C.
Access
(1)
Location Zones 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
D.
Prepare for the Trouble-shooting.
(1)
Make sure that no electrical power is on the airplane buses (Ref 24-22-00/201).
(a)
Make sure that the GRD PWR, GEN, and APU GEN switches on the P5-4 panel are in the OFF position.
(b)
Make sure that the GROUND SERVICE switch on the forward attendent's panel P13 is in the OFF position.
(c)
Make sure that the BAT switch on the P5-13 panel is in the OFF position.
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24-41-00
ALL ú ú 01 Page 101 ú Nov 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(2)
Make sure that the STANDBY POWER switch is in the AUTO position.
(3)
Make sure that the BUS TRANS switch is in the AUTO position.
(4)
Make sure that the circuit breaker on the front face of the bus protection panel is closed.
(5)
Make sure that these circuit breakers are closed:
(a)
P6-4 panel
1) C6, CONTROL GENERATOR APU
(b)
P6-5 panel
1) C32, FUELING AND EXTERNAL POWER CONTROL
2) C1075, EXTERNAL POWER CONTROL
(c)
P6-11 panel
1) C813, GROUND SERVICE
(d)
P6-12 panel
1) C811, BUS PROTECTION PANEL
2) C812, GROUND SERVICE - EXTERNAL POWER
(6)
Make sure that the refueling station access door is closed.
(7)
Open the external power receptacle door.
WARNING: BEFORE YOU CONNECT THE EXTERNAL POWER CABLE TO THE AIRPLANE,
_______ MAKE SURE THE EXTERNAL POWER CABLE IS NOT ENERGIZED. ELECTRICAL ARCS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(8)
Connect an external power cable to the to P19 receptacle.
(9)
Energize the external power cable.
(10)
Look at the EXTERNAL POWER - CONN and NOT IN USE lights on the P19 panel.
E. Procedure
(1) Do the trouble-shooting in figure 101.
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ALL ú ú 01 Page 102 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
PREREQUISITES:
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: C6 CONTROL GENERATOR APU ON P6-4 C812 GROUND SERVICE - EXTERNAL POWER ON P6-12 C811 BUS PROTECTION PANEL ON P6-12 C813 GROUND SERVICE ON P6-11 C1075 EXTERNAL POWER CONTROL ON P6-5 C32 FUELING AND EXTERNAL POWER CONTROL ON P6-5 CIRCUIT BREAKER ON THE FACE OF THE BPP ON P6
CORRECTLY AC EXTERNAL POWER DOES NOT OPERATE ALL ELECTRICAL POWER OFF (AMM 24-22-00/201) REFUELING STATION ACCESS DOOR CLOSED EXTERNAL POWER CABLE CONNECTED AND ENERGIZED MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION:
NO
1 PREPARE AC EXTERNAL POWER
41 EXAMINE THE EXTERNAL POWER FOR THE TROUBLESHOOTING RECEPTACLE (AMM 24-41-11/601), (REF PARAGRAPH D.). THE EXTERNAL POWER CABLE, AND
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