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(c) Aural warning (single chime).
(d) THR LK message flashing on the two PFDs if, upon disengagement, the thrust is frozen on at least one engine (THR LK = thrust lock). In addition, the A/THR engage pushbutton switch goes off on the FCU and the A/THR indication (white or cyan) disappears on the PFD. If energy management functions are activated, memothrust situation is indicated by:
-amber ENGINE THRUST LOCKED flashing message on Upper ECAM DU -repetitive single chime and MASTER CAUT light on. THR LEVERS ..... MOVE message is repeated on upper ECAM DU.
(e) Throttle control levers below CL warning If energy management functions are activated, if both throttle control levers are set below the CL gate (or one throttle control lever below MCT gate in case of engine failure), the following warnings are provided:
-amber AUTO FLT A/THR LIMITED flashing message on upper ECAM DU -repetitive single chime -MASTER CAUT light on. THR LEVERS ..... MOVE message is repeated on upper ECAM DU. 1EFF : ALL 1 22-31-00Page 13 1 1 Feb 01/98 1 1 1CES 1
(2) Conditions for clearing of A/THR warnings There are several causes of A/THR disengagement (Ref. Para. 2.C. (2)). (a) Upon disengagement of the A/THR through the throttle control levers in the IDLE position below 50 ft., the FWC generates no warning.
(b) Upon intentional disengagement of the A/THR through action on one of the two instinctive disconnect pushbutton switches or through the throttle control levers in the IDLE position above 50 ft., the warnings are automatically cancelled:
- the MASTER CAUT light goes off after 3s
- the A/THR OFF message disappears after 9s.
NOTE : The two warnings above can be cancelled faster by pilot ____ through action on the MASTER CAUT light or on one of the two instinctive disconnect pushbutton switches. (c) Upon disengagement of the A/THR due to one of the other causes, the two visual warnings can be cancelled: - through action on one of the CLR keys located on the ECAM control panel
- through action on the MASTER CAUT light
- through action on one of the two instinctive disconnect pushbutton switches.
(3) Elaboration of A/THR warning (Ref. Fig. 005) Each FWC elaborates the A/THR warning and uses the signals below: -A/THR engagement (boolean from the FMGC via the FCU)
-position of the throttle control levers from the ECUs/EECs. The warning cancellation is made by the input discretes from the instinctive disconnect pushbutton switches. The 3 DMCs convert these codes into specific codes which are sent to the PFDs and to the upper display unit of the ECAM system through the DSDL bus. In normal operation:
- the DMC1 drives the PFD1 and the upper display unit of the ECAM system,
- the DMC2 drives the PFD2. In case of DMC1 or DMC2 failure, the crew can switch over to the DMC3 through the use of the EIS DMC selector switch. The DMC3 replaces totally the failed DMC.
1EFF : ALL 1 22-31-00Page 14 1 1 Feb 01/98 1 1 1CES 1
A/THR Warnings Figure 004
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A/THR Warnings Computation and Display Figure 005 1EFF : ALL 1 22-31-00 Page 17 1 1 Feb 01/98 1 1 1CES 1
AUTOTHRUST MODES - DESCRIPTION AND OPERATION ____________________________________________ 1. General
_______ The A/THR modes which enable to perform the automatic thrust control are SPD/MACH, THRUST and RETARD. These modes are activated automatically as a function of the AP or FD - selected longitudinal modes.
2. System Description
__________________ A. Engage Logic of A/THR Modes (Ref. Fig. 001) The choice of A/THR mode according to the AP/FD active mode or sub-mode is shown in the table below: 1EFF : ALL 1 22-32-00Page 1 1 1 Feb 01/98 1 1 1CES 1
Activation of A/THR Mode according to AP/FD Modes Figure 001 1EFF : ALL 1 22-32-00 Page 2 1 1 Feb 01/98 1 1 1CES 1
-------------------------------------------------------------------------------| AP/FD | A/THR Mode | Remarks | | Mode | Sub-Mode | | | |------------------|------------------|------------------|--------------------| | Takeoff-Go Around| -| Thrust | If A/THR is not | | | | | active the takeoff | | | | | or go-around thrust| | | | | is directly | | | | | controlled by the | | | | | ECUs/EECs. | |------------------|------------------|------------------|--------------------| | V/S-FPA | V/S-FPA | SPD/MACH | | | |------------------|------------------|--------------------| | | ALT | SPD/MACH | | |------------------|------------------|------------------|--------------------| | ALT ACQUIRE | -| SPD/MACH | | |------------------|------------------|------------------|--------------------| | ALT | ALT | SPD/MACH | | | |------------------|------------------|--------------------| | | V/S | SPD/MACH | | |------------------|------------------|------------------|--------------------| | CLB-DES | SPEED/THRUST | THRUST | | | | V.PATH/SPEED | SPD/MACH | | | | FPA/SPEED | SPD/MACH | | | | V/S/SPEED | SPD/MACH | | | | V. PATH/THRUST | THRUST | | |------------------|------------------|------------------|--------------------| | EXPEDITE | -| THRUST | | |------------------|------------------|------------------|--------------------| | OPEN CLB | -| THRUST | | | OPEN DES | | | | |------------------|------------------|------------------|--------------------| | | | | _ | | FINAL DESCENT | | SPD | _| R.NAV APPROACH | | GLIDE CAPT | | SPD | | | | GLIDE TRACK | | SPD | | ILS APPROACH | | LAND TRACK | | SPD | _| | ------------------------------------------------------------------------------- www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM AUTO FLIGHT 自动飞行2
