787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Electrical -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 6.10.15
CBIC Indication Symbology
Individual circuit breaker operational status is represented by a symbol on the
CBIC display.
Symbol Condition Description
ECB or TCB closed
(green)
Circuit is powered.
Note: The same symbol depicts a closed
ECB or TCB. TCBs state can be
monitored, but can not be
controlled by CBIC.
ECB open (white) Circuit is not powered.
TCB open (white) Circuit is not powered.
Note: TCBs state can be monitored, but
can not be controlled by CBIC.
ECB tripped (amber) ECB is tripped due to a fault. Circuit is open
and not powered.
ECB collared and
tagged INOP
(white tag, cyan lock
collar)
ECB is open and collared for dispatch. Circuit
is not powered.
ECB collared and
tagged DO NOT
CLOSE
(red tag, cyan lock
collar)
ECB is open and collared for maintenance
purposes. Circuit is not powered.
ECB or TCB
condition unknown
(amber)
The circuit status can not be determined.
TRIPPED
INOP
DO NOT
CLOSE
UNKNOWN
February 15, 2010
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