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Applicable to:
TCAS MODES
Applicable to: ,
The TCAS has two modes of operation :
TA/RA : Selected on the ATC/TCAS panel; this mode allows the display of all intruders, as
classified by the TCAS.
TA : Can be selected:
• By the crew, on the ATC/TCAS panel, in case of aircraft degraded performance
(engine failure, landing gear extended), or when operating near closely-spaced
parallel runways,
• Automatically, when the following priority messages are triggered:
‐ Stall
‐ GPWS messages.
Consequently:
• All RAs are inhibited and converted into TAs
•􀀃The􀀃TA􀀃threshold􀀃is􀀃set􀀃to􀀃TAU􀀃≤􀀃20􀀃seconds,􀀃irrespective􀀃of􀀃the􀀃aircraft’s􀀃altitude􀀃
• No vertical speed advisories are indicated on the PFD
• “TA ONLY” is displayed on the NDs
In case priority messages are triggered, all aural TCAS messages are suppressed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - DESCRIPTION
A330/A340 FLEET DSC-34-80-10 P 9/10
FCOM 19 AUG 10
TCAS MODES
Applicable to:
The TCAS has two modes of operation :
TA/RA : Selected on the ATC/TCAS panel; this mode allows the display of all intruders, as
classified by the TCAS.
TA : Can be selected:
• By the crew, on the ATC/TCAS panel, in case of aircraft degraded performance
(engine failure, landing gear extended), or when operating near closely-spaced
parallel runways,
• Automatically, when the following priority messages are triggered:
‐ Windshear ��
‐ Stall
‐ GPWS messages.
Consequently:
• All RAs are inhibited and converted into TAs
•􀀃The􀀃TA􀀃threshold􀀃is􀀃set􀀃to􀀃TAU􀀃≤􀀃20􀀃seconds,􀀃irrespective􀀃of􀀃the􀀃aircraft’s􀀃altitude􀀃
• No vertical speed advisories are indicated on the PFD
• “TA ONLY” is displayed on the NDs
In case priority messages are triggered, all aural TCAS messages are suppressed.
ADVISORY INHIBITION
Applicable to: ,
Some advisories are inhibited, depending on the aircraft altitude :
‐ All intruders flying below 380 ft AGL, when the own aircraft altitude is below 1 700 ft AGL.
‐ All RA aural messages below 1 100 ft AGL in climb, and 900 ft AGL in descent. In this case, the
RAs are converted into TAs.
‐ “Descend” type advisory below 1 200 ft AGL in climb, or 1 000 ft AGL in descent.
‐ “Increase Descent” RA below 1 650 ft AGL in climb, or 1 450 ft AGL in descent.
‐ All TA aural messages below 600 ft AGL in climb and below 400 ft AGL in descent.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - DESCRIPTION
A330/A340 FLEET DSC-34-80-10 P 10/10
FCOM 19 AUG 10
ADVISORY INHIBITION
Applicable to:
Some advisories are inhibited, depending on the aircraft altitude :
‐ At low altitude
‐ All intruders flying below 380 ft AGL, when the own aircraft altitude is below 1 700 ft AGL.
‐ Below 1 100 ft in climb, and 900 ft in descent all TA aural messages are inhibited and all RA are
inhibited and converted into TA.
‐ “Descend” type advisory below 1 200 ft AGL in climb, or 1 000 ft AGL in descent.
‐ “Increase Descent” RA below 1 450 ft AGL.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-34-80-20 P 1/16
FCOM 19 AUG 10
ATC/TCAS PANEL
Applicable to:
(1) TCAS mode selector
TA/RA : Normal position.
Proximate and other intruders, traffic advisories (TA) and resolution
advisories (RA) are displayed if :
‐ ALT RPTG switch is at ON, and
‐ In flight, the ATC mode selector is at ON or AUTO.
TA : This mode may be used in case of aircraft degraded performance
(engine failure, landing gear extended...) or on parallel runways.
All RAs are converted into TAs.
TAs, proximate and other intruders are displayed.
STBY : The TCAS is on standby.
(2) TRAFFIC selector
The TRAFFIC selection affects only the display of proximate and others.
THRT : Proximate and other intruders are displayed only if a TA or RA is present, and they
are within 2 700 ft above and 2 700 ft below the aircraft.
ALL : Proximate and other intruders are always displayed, even if no TA or RA is present.
(full time function). The altitude range is 2 700 ft above the aircraft to 2 700 ft below.
　
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