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Displays the selected TCAS mode.
Altitude Format (cyan)
Displays the selected altitude format.
(relative or absolute)
Radio Tuning Unit -- TCAS Main Page
Center Pedestal
Mode Selection
Used to select TCAS mode. Selected mode is displayed in cyan.
AUTO -- All advisories are displayed.
STBY -- All interrogations are inhibited.
TA ONLY -- Only traffic advisories are displayed.
Altitude Format
Used to select altitude format.
REL -- Relative to own airplane altitude.
ABS -- Absolute with respect to barometric altitude.
TCAS Key
Used to select TCAS main page.
Traffic Selection
Used to select traffic display
mode. Selected setting is
displayed in cyan.
ON -- Displays all
transponder traffic
(advisory, proximate and
others).
OFF -- Displays advisory
traffic only.
Altitude Range
Used to select surveillance
airspace relative to own air
plane altitude. Selected
setting is displayed in cyan.
ABOVE -- 9,900 feet above
and 2,700 feet below.
NORM -- 2,700 feet above
and below.
BELOW -- 2,700 feet above
and 9,900 feet below.
<0012> <0012>
<0024><0050>
Vol. 1 18--70--5
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual
CSP A--013
MASTER
A. Traffic Advisory
The traffic advisory (TA) is issued to indicate the relative positions of intruding aircraft
that are about 40 seconds from the closest point of approach.
Traffic advisories are displayed on the MFD (in TCAS mode) and shows the relative
position of nearby ATC transponder equipped aircraft.
The traffic advisory allows the flight crew an opportunity to visually locate the intruding
aircraft. The advisory is always displayed on the PFDs or can be displayed on the
TCAS page of the MFD if selected from the display control panel.
TA ONLY (Traffic advisory only) will be displayed automatically when the aircraft is 1000
feet or below, and will revert to pre-selected mode automatically when the aircraft is
above 1000 feet.
B. Resolution Advisory
Resolution advisories (RA) will direct the flight crew to resolve a threat by executing an
aircraft maneuver that will increase separation. This occurs when the TCAS computer
predicts that the intruding aircraft is within about 25 seconds from the closest point of
approach.
Resolution advisories are displayed on the vertical speed indicator (VSI) portion of the
PFD. The VSI shows the appropriate vertical maneuver to avoid the threat. The VSI
provides vertical guidance to maintain safe vertical separation as follows:
S Corrective RAs -- Fly from the red zone to the green zone
S Preventive RAs -- Do not fly into the red zone.
The vertical maneuver is also accompanied by TCAS voice warnings.
NOTE
The TCAS resolution advisory programs are based on
the pilot initiating the RA maneuver within
approximately 5 seconds. If an additional corrective
resolution advisory is issued (e.g. a reversal), the
maneuver must be initiated within 2.5 seconds.
REV 56, Jan 31/03
NAVIGATION SYSTEMS Vol. 1 18--70--6
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual MASTER
CSP A--013
Traffic Collision Avoidance System --- PFD Indications <MST>
Figure 18---70---5
TCAS Message Area
TRAFFIC (red) -- Indicates TCAS resolution
advisory (flashes for first 10 seconds).
TRAFFIC (amber) -- Indicates TCAS traffic
advisory (flashes for first 10 seconds).
TCAS FAIL (amber) -- Indicates TCAS
system failure.
TCAS RA FAIL (amber) -- Indicates PFD is
unable to display TCAS resolution advisory.
TA ONLY (white) -- Indicates that TCAS has
been selected to traffic advisory only mode,
or has been automatically selected when the
aircraft is below 1,000 feet. Flashes amber
when traffic advisory is present.
TCAS OFF (white) -- Indicates that TCAS
has been selected to standby mode.
TCAS TEST (white) -- Indicates that TCAS
system is in test.
Resolution Advisory
Arc on vertical speed scale displays
collision avoidance instructions.
Red band -- Range to be avoided.
Green band -- Target range or
range to be maintained.
Primary Flight Display
Pilot’s and Copilot’s Instrument Panels
Vertical speed pointer and readout
turn red when a TCAS resolution
advisory is issued and speed is not
within corrective limits.
1 2 4
1 2 4
0.0
NOTE:
Vol. 1 18--70--7
REV 56, Jan 31/03
NAVIGATION SYSTEMS
　
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