787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Electrical -
System Description
Copyright © The Boeing Company. See title page for details.
6.20.10 D615Z003-TBC
“On-Ground Battery Only” mode – When the BATTERY switch is selected to ON
while the airplane is on the ground, and there are no other power sources
connected. This mode is to support the airplane power-up sequence. Significant
loads energized by this mode include:
Note: Some overhead panel indicator lights are inoperative in On-Ground
Battery Only mode.
“Ground Handling” mode – When the first forward external power receptacle is
connected (not selected ON), and there are no other power sources. Significant
loads energized by this mode include:
Note: Ground Handling mode has priority over On-Ground Battery Only mode,
and initializes regardless of BATTERY switch position.
“Ground Service” mode – When the GROUND SERVICE switch on the master
attendant switch panel is selected ON while in Ground Handling Mode. In
addition to loads energized by Ground Handling mode, other significant loads
energized by this mode include:
• captain’s inboard DU
• lower DU
• MCP
• APU start capability
• wing fueling panel
• captain’s / first officer’s ACP
• captain’s / first officer’s
flight interphone
• VHF L
• TCP L
• DSP L
• MFK L
• CCD L
• AHRU L, R
• FMC
• CCR L
• ground crew call horn
• engine/APU fire detection
• miscellaneous lighting
• lower display unit
• APU start capability
• MFK L
• CCD L
• CCR L, R
• equipment cooling
• engine/APU fire detection
• cargo compartment lighting
• cargo door actuation systems
• cargo handling systems
• cargo loading lights
• service compartment lights
• wing fueling panel
• battery chargers
• cabin system (limited operation) • cabin lighting (limited
operation)
February 15, 2010
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