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Aircraft control is AUTOMATIC (Autopilot or
autothrust), or MANUAL (Pilot action on side sticks
or on thrust levers). Aircraft guidance is MANAGED
(Targets are provided by the FMGC), or SELECTED
(Guidance targets are selected by the pilot through
the FCU).
DATA BASE LOADING
The data base must be loaded and updated to keep the
system operational.
NOTE: Only the navigation data base is periodically
updated.
POWER-UP TEST FD ENGAGEMENT
As soon as electrical power is available, the Flight
Director (FD) is automatically engaged provided that
the power-up test is successful.
No guidance symbols are displayed as long as no AP/FD
mode is active.
MCDU INITIALIZATION
First, MCDU STATUS page is displayed. Then, the pilot
uses the MCDU for flight preparation, which includes:
- choice of the data base,
- flight plan initialization,
- radio nav entries and checks,
- performance data entry (V1, VR, V2 and FLEX
TEMP).
V2, at least, must be inserted in the MCDU before
take-off.
Entry of the flight plan (lateral and vertical) and
V2 into the MCDU is taken into account by the Flight
Management (FM) part and confirmed by the lighting of
the associated lights on the FCU.
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BASIC OPERATIONAL PRINCIPLES
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BASIC OPERATIONAL PRINCIPLES
A/THR ENGAGEMENT
Autothrust (A/THR) engagement occurs when the pilot
moves the thrust levers to the TO/GA or FLX/MCT gate.
Then:
. the FMGC automatically engages:
- the take-off modes for yaw and longitudinal
guidance (RunWaY (RWY) and Speed Reference
System (SRS)),
- the autothrust function (but it is not active).
. the FD symbols appear on the PFD (Green FD yaw bar
and pitch bar).
For take-off, the thrust levers are set to the TO/GA
gate or the FLEX/MCT gate if a flexible temperature
has been entered on the MCDU.
At the thrust reduction altitude, the FM part warns
the pilot to set the thrust levers to CLB gate.
NOTE: The thrust levers normally will not leave this
position until an audio message "RETARD"
requests to the pilot to set the thrust levers
to IDLE gate before touchdown.
AP ENGAGEMENT
Either autopilot (AP) can only be engaged 5 seconds
after lift off. Only one autopilot can be engaged at
a time, the last in, being the last engaged.
After the normal climb, cruise and descent phases,
selection of LAND mode (Autoland) allows both APs to
be engaged together.
After touchdown, during ROLL OUT mode, APs remain
engaged to control the aircraft on the runway
centerline.
Then the pilot disengages the APs at low speed, taxies
and stops the aircraft.
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SELF EXAMINATION
When is FD engaged?
A - As soon as at least one AP is engaged.
B - As soon as A/THR is engaged.
C - At the end of a successful power-up test.
Concerning AP engagement, which of the following is
true?
A - Both APs can be engaged whatever the
flight phase.
B - During the approach phase, it is
recommended to engage the second AP.
C - Both APs can never be engaged at the
same time (Last in, last engaged).
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22 - AUTO FLIGHT SYSTEM
22-00-00 AFS MAINTENANCE SYSTEM
CONTENTS:
General
FIDS
BITEs
FAC/FM/FG BITE
FCU BITE
MCDU BITE
GROUND SCAN
AFS TEST
LAND TEST
Safety Tests
Procedure
Self Examination
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ATA 22 AUTO FLIGHT SYSTEM(13)
