(d)
Use a cargo tie down to support the cable.
(e)
Energize the power cable.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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(f) Make sure these white lights on the P30 panel are on:
1) The CONNECTED light.
2) The NOT IN USE Light.
S 862-033
(3) Do these steps to remove the external power from the ground handling bus:
(a)
Remove the power from the external power cable.
(b)
Make sure these lights on the P30 panel are off:
1) The CONNECTED light.
2) The NOT IN USE light.
WARNING: REMOVE THE ELECTRICAL POWER FROM THE EXTERNAL POWER CABLE
_______ BEFORE YOU REMOVE THE CABLE FROM THE AIRPLANE. INJURY TO PERSONS CAN BE CAUSED BY AN ELECTRICAL SHOCK.
(c)
Remove the external power cable.
(d)
Close the cover on the P30 panel.
S 862-034
(4) Do these steps to supply the external power to the ground service bus:
NOTE: The ground handling bus energizes automatically when the
____
external power is supplied to the receptacle.
(a) Open the cover on the external power panel P30.
WARNING: IF THE EXTERNAL POWER SUPPLY HAS AN EARTH GROUNDED
_______ NEUTRAL, THERE MUST NOT BE AN OPEN OR FLOATING GROUND IN THE NEUTRAL CIRCUIT WIRING OF THE SUPPLY OR THE AIRPLANE. IF AN OPEN OR FLOATING GROUND IS PRESENT, THE AIRPLANE CAN BE PUT AT AN ELECTRICAL POTENTIAL ABOVE EARTH GROUND. THIS ELECTRICAL POTENTIAL CAN RESULT IN ELECTRIC SHOCK WITH POSSIBLE SEVERE INJURY TO PERSONNEL WHO TOUCH THE AIRPLANE.
(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 does not operate correctly, do this task: Static Grounding (AMM 24-41-01/401).
WARNING: REMOVE THE ELECTRICAL POWER FROM THE EXTERNAL POWER CABLE
_______ BEFORE YOU CONNECT THE CABLE TO THE AIRPLANE. INJURY TO PERSONS CAN BE CAUSED BY AN ELECTRICAL SHOCK.
(c)
Install the power cable in the external power receptacle.
(d)
Use a cargo tie down to support the cable.
(e)
Energize the power cable.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-22-00
ALL ú ú 01 Page 204 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(f)
Make sure these white lights on the P30 panel are on: 1) The CONNECTED light. 2) The NOT IN USE light.
(g)
Push the GRND SERV BUS switch on the left forward attendant's panel P21. 1) Make sure the light in the GRND SERV BUS switch is on.
(h)
Make sure the NOT IN USE light on the P30 panel is off.
S 862-035
(5) Do these steps to remove the external power from the ground service bus:
(a)
Push the GRND SERV BUS switch on the left forward attendant's panel P21. 1) Make sure the light in the switch is off.
(b)
Make sure the white NOT IN USE light on the external power panel P30 is on.
(c)
Remove the power from the external power cable.
(d)
Make sure these lights on the P30 panel are off.
1) The CONNECTED light.
2) The NOT IN USE light.
WARNING: REMOVE THE ELECTRICAL POWER FROM THE EXTERNAL POWER CABLE
_______ BEFORE YOU REMOVE THE CABLE FROM THE AIRPLANE. INJURY TO PERSONS CAN BE CAUSED BY AN ELECTRICAL SHOCK.
(e)
Remove the external power cable.
(f)
Close the cover on the P30 panel.
S 862-036
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