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ALL
FLIGHT MODE ANNUNCIATOR DESCRIPTION/OPERATION
ENGAGEMENT STATUS
Here is a list of the possible messages in the
engagement status zone.
Engagement status:
- First line in white: AP1+2, AP1, AP2.
- Second line in white: 1FD- (FD1 is engaged on
Captain side), -FD1 (FD1 is engaged on F/O
side), -FD2 (FD2 is engaged on F/O side), 2FD-
(FD2 is engaged on Captain side), 1FD2 (both
FDs are engaged, one on each side), 1FD1 (FD2
is failed, FD1 is engaged), 2FD2 (FD1 is failed,
FD2 is engaged).
- Third line in cyan: A/THR (engaged and not
active).
Third line in white: A/THR (engaged and
active).
Flight Director (FD) indications flash for several
seconds after Flight Director engagement or display
transfer.
MESSAGES
Here are examples of the possible messages.
Advisory messages appear in white on the third line
in zones 2 and 3, for example: MORE DRAG.
There is one red message dedicated to this display
area, that is: MAN PITCH TRIM ONLY.
TMUFGCR04-T01 LEVEL 3
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MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
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SELF EXAMINATION
Green color is used for:
A - armed modes.
B - active modes.
C - engagement status.
A/THR cyan indication in the engagement status zone
indicates that the:
A - autothrust is disengaged.
B - autothrust is engaged and not active.
C - autothrust is engaged and active.
The landing category and decision height value
appear when:
A - the autopilot is engaged.
B - LAND mode is armed or active.
C - an ILS frequency is autotuned.
TMUFGCR04 LEVEL 3
EFFECTIVITY 22-00-00 Page 6
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UF94200
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22 - AUTO FLIGHT SYSTEM
22-70-00 FLIGHT MANAGEMENT PRIORITY LOGIC
CONTENTS:
FM Operating Modes
Mode Operation
MCDU
Displays
Radio Navigation
Self Examination
TMUFM0601 LEVEL 1
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FLIGHT MANAGEMENT PRIORITY LOGIC
FM OPERATING MODES
There are three operating modes: NORMAL, INDEPENDENT
and SINGLE.
At Flight Management (FM) initialization, that means
at power up, both FM parts exchange information.
Initial cross-comparison is made on the following
parameters: Navigation data base identification,
performance data base identification, FM operational
program identification, aircraft program pin data and
engine program pin data.
NORMAL MODE
If the Flight Management parts agree, NORMAL mode is
active.
When keys are pressed, they are immediately processed
by both FMs, regardless of the Multipurpose Control
Display Unit (MCDU) from which they originate.
INDEPENDENT MODE
If the FM parts disagree, a white message "FMS1/FMS2
A/C STS DIFF" is displayed on the MCDUs and the system
then reverts to INDEPENDENT mode.
Each FM part manages its own MCDU.
A failure in the Flight Management and Guidance
Computers (FMGCs) inter system buses results in the
amber MCDU message "INDEPENDENT OPERATION".
SINGLE MODE
If one FM part has failed, SINGLE mode is active.
Both MCDUs are driven by the remaining FM part.
A white message "OPP FMGC IN PROGRESS" is displayed
on the MCDU corresponding to the failed FMGC.
TMUFM0601-T01 LEVEL 1
EFFECTIVITY 22-70-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
UF94200
EFFECTIVITY Page 148
ALL
TMUFM0601-P01 LEVEL 1
FLIGHT MANAGEMENT PRIORITY LOGIC
EFFECTIVITY 22-70-00 Page 3
Dec 31/94
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 22 AUTO FLIGHT SYSTEM
UF94200
EFFECTIVITY Page 149
ALL
FLIGHT MANAGEMENT PRIORITY LOGIC
MODE OPERATION
NORMAL MODE
In NORMAL mode, the Flight Management part receives
the master/slave activation from the Flight Guidance
(FG) part.
The MASTER computer imposes the following parameters
upon the SLAVE computer:
- flight phase,
- flight plan sequencing,
- active performance mode and speeds,
- clearance and maximum altitudes,
　
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