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suppresses the thrust lock and gives the flight crew manual control with the thrust levers.
When the Thrust Lock function is active:
‐ “THR LK” flashes amber on the FMA
‐ ECAM “ENG THRUST LOCKED” flashes every 5 s
‐ ECAM displays “THR LEVERS......MOVE”
‐ A single chime sounds and the Master Caution light flashes every 5 s.
All warnings cease when the flight crew moves the thrust levers out of the detent.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOTHRUST
A318/A319/A320/A321 FLEET DSC-22_30-90 P 7/16
FCOM 19 AUG 10
A/THR DISCONNECTION CAUTION
Applicable to: ALL
A/THR DISCONNECTION
BY INSTINCTIVE
DISCONNECT pb
OR SETTING TWO
LEVERS TO IDLE
(if above 50 ft RA)
BY OTHER MEANS
MASTER
CAUTION light
Illuminated
3 s maximum Illuminated
ECAM MESSAGE A/THR OFF amber message
9 s maximum
Flashing ENG THRUST
LOCKED amber caution, AUTO
FLT A/THR OFF amber caution,
blue "THR LEVERS.....MOVE"
AUDIO Single chime Single chime
CONSEQUENCE
CLR pb on ECAM
CONTROL PANEL Extinguished Illuminated
MASTER
CAUTION light
‐ Extinguishes MASTER
CAUTION light
‐ Erases ECAM message
Extinguishes MASTER
CAUTION light
CLR pb on ECAM
CONTROL PANEL No effect
‐ Extinguishes MASTER
CAUTION light and CLR pb
‐ Erases ECAM message
‐ Calls status
ACTION
INSTINCTIVE
DISCONNECT pb
‐ Extinguishes MASTER
CAUTION light
‐ Erases ECAM message
Extinguishes MASTER
CAUTION light
ECAM STATUS MESSAGE NO YES
The standard disconnection triggers temporary ECAM message and caution light. Single chime
sounds.
The non standard disconnection triggers caution light and ECAM message removed only by a flight
crew action. Single chime sounds.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOTHRUST
A318/A319/A320/A321 FLEET DSC-22_30-90 P 8/16
FCOM 19 AUG 10
A/THR MODES
Applicable to: ALL
GENERAL
Except in takeoff and go-around situations, normal operation of the A/THR system requires the
thrust levers to be:
‐ In the CL detent for the two-engine configuration. If they are not set in the CL detent, “LVR CLB”
flashes white on the FMA.
‐ In MCT detent when in the one-engine-out configuration. If the appropriate lever is not set in the
MCT detent, “LVR MCT” flashes white on the FMA.
The A/THR modes are selected automatically in conjunction with the AP/FD modes (except for
ALPHA FLOOR):
A/THR in THRUST mode AP/FD pitch mode maintains the speed:
OP CLB - OP DES - CLB - EXP CLB �� - EXP DES �� - SRS - FLARE and
DES (IDLE path)
A/THR in SPEED/MACH mode If neither AP nor FD is engaged
If AP/FD controls a vertical path:
V/S - FPA - ALT* - ALT CST* - ALT - ALT CRZ - G/S* - G/S - FINAL and DES
(geometric path)
A/THR in RETARD mode AP/FD engaged in LAND mode during an automatic landing
THRUST MODE
In THRUST mode, autothrust commands a specific thrust level in conjunction with the AP/FD pitch
mode. This thrust level is limited by thrust lever position.
FMA Display Meaning
THR MCT Single engine thrust in climb. The live engine is at maximum continuous thrust
(thrust lever in MCT detent)
THR CLB Climb thrust in two engine configuration (at least one thrust lever in the CL
detent, the other one below CL)
THR LVR Undetermined thrust (neither CLB nor MCT thrust)
THR IDLE Minimum thrust (both engines at IDLE thrust)
Note: When the A/THR is armed for takeoff or go-around, the FMA displays “MAN TOGA” (or
“MAN FLX”) in white to remind the flight crew that the thrust levers have been positioned
properly.
RETARD MODE
The RETARD mode is only available during automatic landing (ARP engaged in LAND mode).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOTHRUST
A318/A319/A320/A321 FLEET DSC-22_30-90 P 9/16
FCOM 19 AUG 10
At approximately 40 ft RA, the RETARD mode engages and remains engaged after touchdown.
The A/THR commands IDLE thrust during the flare, and the FMA and engine warning display
“IDLE”. If the autopilot is disengaged during the flare before touchdown, the SPEED mode
replaces the RETARD mode, and the flight crew has to manually reduce thrust.
Note: In an automatic landing, the system generates a “RETARD” callout at 10 ft RA, which
　
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