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below the MCT (one engine inoperative), a repeating warning (amber caution, single chime,
"A/THRLIMITED" ECAM message) is activated every 5 s until the flight crew moves the levers
back into the detent. “THR LVR” green is displayed on the FMA.
“LVR CLB” (all engines operative) or “LVR MCT” (one engine inoperative) flashes white in the
first column of the FMA.
This device reminds the flight crew that the normal operating position of the thrust levers, when
A/THR is active, is the CL detent (all engines) or the MCT detent (one engine inoperative).
‐ When at least one thrust lever is set out of the CL (or MCT) detent with autothrust active, the
“LVR ASYM” amber message comes up until all levers are set in the CL detent.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOTHRUST
A330/A340 FLEET DSC-22_30-90 P 9/22
FCOM 19 AUG 10
Applicable to: ,
EFFECTS OF THRUST LEVER MOVEMENT DURING A/THR ACTIVATION
While A/THR is active:
When both thrust levers are set above the CL detent (both ‐ engines operative) or one thrust
lever is set above MCT (one engine operative), the A/THR reverts from active to armed.
“A/THR” turns to blue on the FMA and the thrust levers control the thrust directly. The FMA
displays “MAN THR” white in its first column.
The thrust levers provide the flight crew with an immediate increase of thrust when both thrust
levers are pushed above the CL detent (two engines) or the active thrust lever above the MCT
detent (one engine operative).
‐ When both thrust levers are set below the CL detent (both engines operative) or one thrust lever
is set below MCT (one engine operative), a repeating warning (amber caution, single chime,
"A/THR LIMITED" ECAM message) is activated every 5 s until the flight crew moves the levers
back into the detent. “THR LVR” green is displayed on the FMA.
“LVR CLB” (both engines operative) or “LVR MCT” (one engine operative) flashes white in the
first column of the FMA.
This device reminds the flight crew that the normal operating position of the thrust levers, when
A/THR is active, is the CL detent (two engines) or the MCT detent (one engine operative).
‐ When one thrust lever is in the CL detent and the other one out of the detent, the “LVR ASYM”
amber message comes up until both levers are set in the CL detent (only with both engines
operative).
A/THR DISCONNECTION
Applicable to: ALL
GENERAL
When the A/THR is disconnected, it is neither armed nor active.
The A/THR can be disconnected in two ways:
‐ Standard disconnection:
• The flight crew pushes the instinctive disconnect pb on the thrust levers (which immediately
sets the thrust corresponding to the lever positions), or
• The flight crew sets all thrust levers to IDLE detent.
‐ Non-standard disconnection:
• The flight crew pushes the A/THR pb on the FCU while A/THR is armed/active, or
• The system loses one of the arming conditions.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT GUIDANCE
AUTOTHRUST
A330/A340 FLEET DSC-22_30-90 P 10/22
FCOM 19 AUG 10
CAUTION If the flight crew pushes and holds one instinctive disconnect pb for more than
15 s, the A/THR system is disconnected for the remainder of the flight. All A/THR
functions including ALPHA FLOOR are lost, and they can be recovered only at the
next FMGEC power-up (on ground).
Applicable to:
BELOW 100 FT RADIO ALTITUDE
When the radio altitude is below 100 ft and the flight crew sets all thrust levers above the CL
detent or one above the MCT detent, the autothrust will disconnect. It will rearm automatically
when at least one of the thrust levers is set to TOGA.
If the PF sets the thrust levers above CL detent but below TOGA and comes back to CL detent,
the A/THR will disconnect and remain disconnected. As a result, the thrust will increase up to
CLIMB thrust. The flight crew has to manually set the appropriate thrust for landing (or go-around).
THRUST LOCK FUNCTION
Applicable to: ALL
The THRUST LOCK function is activated when the thrust levers are in the CL detent (or the MCT
detent with one engine out), and:
The flight crew pushes ‐ the A/THR pb on the FCU, or
‐ The A/THR disconnects due to a failure.
The thrust is locked or frozen at its level prior to disconnection. Moving the thrust levers out of the CL
or MCT detent suppresses the thrust lock, and reverts to manual control.
When the thrust lock function is active :
‐ “THR LK” flashes amber on the FMA
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 2(61)
