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when the FCU A/THR pb has been used on ground to arm and disarm the A/THR. (It is sometimes
performed for maintenance purpose).
PROCEDURE BEFORE ENGINE START
ARM the A/THR with the FCU pb to clear the message.
If one engine is started, the FCU pb is inhibited until takeoff and the crew cannot clear the
message.
PROCEDURE AFTER ENGINE START
WAIT until takeoff initiation, the warning will automatically disappear when the thrust lever are
set to FLX or TOGA.
Note: If the warning comes up after engine start, envisage an A/THR failure.
Applicable to:
MCDU LOCKED OR BLANK
PROCEDURE
When one MCDU locks up, or becomes blank, all FMGS functions remain available,
but the pilot cannot enter information into the MCDU, and cannot call up any MCDU
pages for display:
PULL the CB for the locked or blank MCDU, and PUSH it back in after 10 s.
Note: During a RESET/RESYNC, if the crew presses a key while the scratchpad is
showing “PLEASE WAIT”, there is no change at the MCDU level. This is normal,
and the pilot should not respond by pulling the MCDU CB.
When both MCDUs are simultaneously locked up, the failure is usually due to an
FMGC software anomaly:
Pull the FMGC1 CB and push it back in after 10 seconds. If unsuccessful, reset the FMGC2
CB.
The FMGC circuit breakers are:
‐ AUTO FLT/FMGC 1 B2 ON 49 VU.
‐ AUTO FLT/FMGC 2 M17 ON 121 VU.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 20/28
FCOM 19 AUG 10
Applicable to:
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MCDU LOCKED OR BLANK
When an MCDU locks up, or becomes blank, all functions of the FMGS remain available. But, the
pilot cannot enter information into the MCDU, and cannot call up any MCDU pages for display.
PROCEDURE
PULL the CB for the locked or blank MCDU, and PUSH it back in after 10 s.
Applicable to:
MCDU LOCKED OR BLANK
When an MCDU locks up, or becomes blank, all functions of the FMGS remain available. But, the
pilot cannot enter information into the MCDU, and cannot call up any MCDU pages for display.
PROCEDURE
PULL the CB for the locked or blank MCDU, and PUSH it back in after 10 s.
Note: During a RESET/RESYNC, if the crew presses a key while the scratchpad is showing
“PLEASE WAIT”, there is no change at the MCDU level. This is normal, and the pilot
should not respond by pulling the MCDU CB.
Applicable to:
CROSSLOAD OF NAV DATABASE
Both FMGCs are sometimes loaded with 2 different NAV database. The DUAL mode of operation
is not possible until both FMGCs receive the same database.
This may occur when a spare FMGC is loaded on an aircraft very lately before the flight.
The crossload procedure will be applied to restore the DUAL mode of operations.
CROSSLOAD can be initiated during preflight or done phase only.
The MCDU to be used is the MCDU of the FMGC loaded with the correct NAV database.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 21/28
FCOM 19 AUG 10
PROCEDURE
PRESS“ACTIVATE CROSSLOAD” key, on the sending MCDU [ 4L ].
PRESS “CONFIRM CROSSLOAD” key displayed in the same field [ 4L ].
Crossloading is initiated and “CROSSLOAD IN PROCESS” is displayed on both MCDUs. While
crossload is in process, the current percentage of crossload R completion is displayed and the
FMGCs can not be used.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 22/28
FCOM 19 AUG 10
Note: If flight phase transitions from PREFLIGHT or DONE while crossload is in process,
the crossload is aborted. If crossload is unsuccessful “CROSSLOAD ABORTED”
is displayed on the both sides and the receiving side MCDU displays “NDB LOAD
INCOMPLETE”. This message is also displayed following a failed or incomplete data
base loader operation.
Upon successful completion of the crossload, “CROSSLOAD COMPLETE” message is
displayed on the MCDU. A RESYNCH occurs and both MCDUs return to the AIRCRAFT
STATUS page.
Applicable to:
CROSSLOAD OF NAV DATABASE
Both FMGCs are sometimes loaded with 2 different NAV databases. The DUAL mode of operation
is not possible until both FMGCs receive the same database. The MCDU displays “FMS1/FMS2
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 14(63)
