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ATC/TCAS PANEL)
‐ ND : intruder position
TA/RA THRESHOLDS
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-34-80-10 P 6/6
FCOM 19 AUG 10
TCAS MODES
Applicable to: ALL
The TCAS has two modes of operation :
‐ TA/RA : This mode allows the display of all intruders.
‐ 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, or
• Automatically, when the following messages are triggered :
‐ Windshear ��
‐ Stall
‐ GPWS messages
Consequently :
‐ All RAs are inhibited and converted into TAs
‐ The TA threshold is set to TAU ≤ 20 s, irrespective of the aircraft’s altitude.
‐ No vertical speed advisories are indicated on the PFDs.
‐ “TA ONLY” is displayed on the NDs.
If windshear, stall, or GPWS messages are triggered, all aural TCAS messages are suppressed.
ADVISORY INHIBITION
Applicable to:
,
,
MSN,,,,
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 below 1 ‐ 100 ft in climb and 900 ft in descent. In this case, the RAs are converted into TAs.
‐ “Descend” type advisory below 1 200 ft AGL at takeoff or 1 000 ft AGL in approach.
‐ “Increase Descent” RA below 1 450 ft.
‐ All TA aural messages below 600 ft AGL in climb and below 400 ft AGL in descent.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-80-20 P 1/14
FCOM 19 AUG 10
ATC/TCAS PANEL
Applicable to: ,
, MSN
(1) Mode selector
TA/RA : Normal position.
TAs, RAs, proximate and other intruders are displayed.
TA ONLY : This mode should be used, in case of degraded aircraft performance (engine
failure, landing gear extended, or approach on parallel runways).
All RAs are converted into TAs. TAs, proximate and other intruders are
displayed.
STBY : The TCAS and ATC are on standby.
XPNDR : ‐ The TCAS is on standby.
‐ On ground : The selected ATC Transponder only operates in the
selective aircraft interrogation mode of Mode S.
‐ In flight : The selected ATC Transponder operates.
(2) TRAFFIC selector
ABV : The altitude range is set to +7 000 ft above the aircraft, and -2 700 ft below
the aircraft.
N : The altitude range is set to -2 700 ft below the aircraft, and +2 700 ft above
the aircraft.
BLW : The altitude range is set to -7 000 ft below the aircraft, and +2 700 ft above
the aircraft.
(3) AUTO/ON selector or THRT/ALL selector
ON (or ALL) : All intruders are displayed.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-80-20 P 2/14
FCOM 19 AUG 10
AUTO (or
THRT)
: Proximate and other intruders are only displayed, if a TA or RA is already
presented.
Note: Some TCAS control panels are equipped with a THRT/ALL selector, instead of the
AUTO/ON selector. The associated functions remain unchanged.
ATC/TCAS PANEL
Applicable to:
(1) TCAS mode sel
TA/RA : Normal position.
TAs, RAs, proximate and other intruders are displayed, if the ALT RPTG switch is
ON and the transponder is not on STBY.
TA : The TCAS does not generate any vertical orders. This mode should be used, in
case of degraded aircraft performance (engine failure, landing gear extended, or
approach on parallel runways).
All RAs are converted into TAs. TAs, proximate and other intruders are displayed, if
the ALT RPTG switch is ON and the transponder is not on STBY.
The "TA ONLY" white memo is displayed on the NDs.
STBY : The TCAS is on standby.
(2) TRAFFIC sel
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 displayed even if no TA or RA is present (full
time function). The altitude range is -2 700 ft to +2 700 ft.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
TCAS - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-80-20 P 3/14
FCOM 19 AUG 10
ABV : The same as ALL, except that the other intruders are displayed if within 9 900 ft
　
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