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TRIP
OUT
ACPC
CCBP
NOTE: (OUT IN)
Affected circuit breaker font size
is reduced when reset. The reset
circuit breaker will automatically
be removed from STATUS page
list, after successful reset and a
new page is selected.
message goes out.
CB TRIP
THERM CB CAN’T BE CHANGED FROM CDU
NOTE:
Will appear if an attempt to reset
is carried out on a thermal circuit
breaker. A thermal breaker
cannot be reset using EMS CDU.
The affected circuit breaker can
only be manually reset at its
location.
Most recent tripped circuit breaker
will automatically highlight.
To select another circuit breaker,
use the line select key, this
acknowledges and highlights
the displayed breaker.
Once acknowledged or reset,
the CB TRIP message goes out.
Select activation key adjacent
highlighted circuit breaker.
GX_06_010
ACPC
CCBP
M
CIRCUIT BREAKER - STATUS 1/1
STAB TRIM 1
STAB TRIM 2
FUEL COMPUTR CH B
DU 1
RAD ALT 1
AC1
AC ESS
DC ESS
DC ESS
DC 1
LOCKED
OUT
IN
LOCKED
TRIP
6-12 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
ELECTRICAL
AC SYSTEM EICAS MESSAGES
1 . 65
789
EMER PWR ONLY
Indicates that RAT is
powering AC ESS BUS,
or batteries are
feeding DC ESS and
battery buses in
emergency condition.
APU GEN OVLD
Indicates an overload
on the APU generator.
CB TRIP AC FEED
Indicates that a circuit
breaker for an AC
feeder/AC cabin feeder
has tripped.
GEN 1 (2,3,4) OVLD
Indicates an overload
on affected generator
channel.
RAT GEN FAIL
(on ground only)
Indicates that a fault has
been detected in the RAT
generator system during
built-in test (BIT).
AC BUS 1 (2, 3, 4) FAIL
Indicates that affected bus
is not powered, or has
a fault.
AC ESS BUS FAIL
Indicates that AC ESS
is not powered or
has a fault.
APU GEN OVERHEAT
Indicates that the APU
generator oil has
overheated.
CB TRIP DC FEED
Indicates that a circuit
breaker for a DC feeder/
DC cabin feeder has tripped.
GX_06_011
EMER PWR ONLY
AC BUS 1 FAIL
AC BUS 2 FAIL
AC BUS 3 FAIL
AC BUS 4 FAIL
AC ESS BUS FAIL
APU GEN OVERHEAT
APU GEN OVLD
CB TRIP AC FEED
CB TRIP DC FEED
ELEC SYS FAIL
GEN 1 OVLD
GEN 2 OVLD
GEN 3 OVLD
GEN 4 OVLD
RAT GEN FAIL
ELEC SYS FAIL
CAIMS level A fault.
Prevents A/C dispatch until
fixed.
For Training Purposes Only
Sept 04
6-13
P I LOT T R A I N I N G GU I D E
ELECTRICAL
AC SYSTEM EICAS MESSAGES
789
1 . 65
AC BUS 1 (2,3,4) XFER FAULT
Indicates that transfer of
alternate power supply to
affected AC bus is lost.
CB TRIP
Indicates that a circuit
breaker has tripped.
APU GEN FAIL
Indicates that APU
GEN has failed.
RAT GEN ON
Indicates that the RAT is
powering AC ESS BUS
and is the only gen online
AC BUS 1 (2,3,4) MAN OFF
Indicates that the affected bus
has been manually isolated. All
4 buses cannot be manually
isolated concurrently.
RAT GEN OFF
Indicates that the RAT is
deployed and the RAT line
connector is selected off.
ELEC SYS FAULT
Indicates loss of
redundancy on EGPDS
logic. CAIMS level C
fault. Fault must be fixed
within 10 days.
EXT AC PWR AVAIL
Indicates that external
power is available.
GEN 1 (2,3,4) FAIL
Indicates a GCU fault in
the applicable generator.
APU GEN OFF
Indicates that
APU GEN is selected off.
EXT AC PWR ON
Indicates that external
AC power has been
selected on.
GEN 1 (2,3,4) OFF
Indicates that affected
generator is selected off.
GX_06_012
AC BUS1 XFER FAULT
AC BUS2 XFER FAULT
AC BUS3 XFER FAULT
AC BUS4 XFER FAULT
APU GEN FAIL
ELEC SYS FAULT
EXT AC PWR AVAIL
CB TRIP
GEN 1 FAIL
GEN 2 FAIL
GEN 3 FAIL
GEN 4 FAIL
RAT GEN ON
AC BUS 1 MAN OFF
AC BUS 2 MAN OFF
AC BUS 3 MAN OFF
AC BUS 4 MAN OFF
APU GEN OFF
EXT AC PWR ON
GEN 1 OFF
GEN 2 OFF
GEN 3 OFF
GEN 4 OFF
RAT GEN OFF
6-14 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
ELECTRICAL
AC SYSTEM SYNOPTIC
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