Airbus A340 Series, Брошюра

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STL 472.502/90 Issue 6
A340 Automatic Flight System - Guidance Function
10.11
Vertical modes Common modes
Approach • ILS available :
- GLIDE capture and track,
- FLARE,
- LAND,
- ROLL-OUT.
• ILS not available, RNAV approach
selected on MCDU :
- LATERAL guidance on the F-PLN
- VERTICAL guidance and descent
allowed down to MDA.
Takeoff • SRS :
- With engines running V2 + 10 holding ;
- With one engine out
VA (1) holding if VA>V2,
V2 holding if VA<V2.
(1) VA = Aircraft speed when engine
failure occurs.
• RWY :
- Track hold or LOC centerline hold.
Go-around • SRS (as for takeoff) ;
• GA TRK hold.
Level changes [managed guidance (CLB, DES), selected
guidance (OP CLB, OP DES)].
• In CLB/DES modes vertical path is maintained as
defined by the FMGC, taking into account the flight
plan constraints inserted in the system and the
clearance altitude selected on the FCU.
• OP CLB (OP DES) mode allows uninterrupted aircraft
climb or descent towards the FCU selected altitude,
maintaining a TARGET SPEED (managed or selected)
with a fixed given thrust. ALT constraints are ignored.
Altitude hold
The altitude mode is active :
- when the aircraft reaches the FCU altitude, or
- when the ALT pushbutton is pressed, or
- when V/S is set at zero, or
- when in DES or CLB mode, the aircraft reaches a
flight plan altitude constraint.
V/S FPA
• V/S FPA is engaged by pulling on V/S FPA selector.
V/S or FPA value can be selected before or after a pull
action.
• Level off by pushing the V/S / FPA selector (equivalent
to a zero V/S / FA sel mode engagement).