TASK 24-21-00-440-801
3. AC Generation and Load System - Activation
(Figure 201)
A. General
(1) This task has these procedures:
(a) Supply external power from the ground service buses.
(b) Supply external power from the 115V AC transfer buses.
(2) Use the applicable procedure to energize the necessary buses.
B. References
Reference Title
20-40-11-910-801 Static Grounding (P/B 201)
C. Tools/Equipment
Reference Description
STD-858
Tag - DO NOT OPERATE
D. Location Zones
Zone Area
116 Nose Landing Gear Wheel Well - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
E. Access Panels
Number Name/Location
117A Electronic Equipment Access Door
F. Procedure
SUBTASK 24-21-00-860-016
(1) Do these steps to supply external power to the ground service and 115V AC transfer buses:
(a) Open the External Power Receptacle Door.
WARNING
MAKE SURE THAT THERE IS NO OPEN OR FLOATING GROUND IN THE
NEUTRAL CIRCUIT OF THE POWER SUPPLY OR THE AIRCRAFT. AN
OPEN OR FLOATING GROUND CAN CAUSE ELECTRICAL SHOCK TO
PERSONNEL WHO TOUCH THE AIRCRAFT.
(b) Make sure the external power supply operates correctly before you supply external power
to the airplane.
1) If the ground return (neutral) circuit on the external power supply or the external
power receptacle do not operate correctly, do this task: Static Grounding,
TASK 20-40-11-910-801
WARNING
REMOVE ELECTRICAL POWER FROM THE EXTERNAL POWER
SOURCE. IF YOU DO NOT REMOVE ELECTRICAL POWER, YOU CAN
CAUSE INJURIES TO PERSONNEL AND DAMAGE TO EQUIPMENT.
(c) Install the power cable to the external power receptacle.
(d) Energize the external power cable.
(e) Make sure these lights on the external power panel, P19 are on:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-00
Page 205
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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