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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-014
General
The TCAS computer puts traffic into these four groups:
* Other traffic shows as a white open diamond, and the altitude
readout is white text
* Proximate traffic shows as a solid white diamond, and the
altitude readout is white text
* Traffic advisory (TA) shows as a solid amber circle, and the
altitude readout is amber text
* Resolution advisory (RA) shows as a solid red square and
the altitude readout is red text.
Each traffic symbol has an altitude readout. A vertical motion
arrow is also shown if the airplane vertical speed is greater
than 500 feet per minute (fpm). The traffic symbols show in
these navigation display modes:
* Center (CTR) MAP
* Expanded (EXP) MAP
* Expanded (EXP) VOR
* Expanded (EXP) APP.
Range Data
Push the TFC switch on the EFIS control panel to show TCAS
data. The range the EFIS control panel selects also shows on
the ND.
In addition to the range, the TCAS 3 nautical mile (nm) range
ring shows for ranges greater than 5 nm and less than 160 nm.
Also, when you push the TFC switch, range arcs show on the
ND.
Altitude Readout
Relative altitude shows in the same color as the traffic symbol
on the NDs.
Altitude Separation
The TCAS computer calculates the altitude separation between
own airplane and the target. It uses the barometric altitudes of
the airplanes to do this. The altitude separation shows on the
ND in hundreds of feet. If the traffic is above, the digits show
above the traffic symbol with a plus (+) sign. If the traffic is
below, the digits show below the traffic symbol with a minus (-)
sign.
If the altitude separation is less than 100 feet, 00 shows.
If the altitude separation cannot be calculated, the altitude
display does not show.
Vertical Motion Arrow
A vertical motion arrow shows on the right side of the traffic
symbol. It is the same color as the traffic symbol.
TCAS - NAVIGATION DISPLAY
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-45-00-015
The arrow points down if the traffic airplane goes down at a rate
more than or equal to 500 fpm. The arrow points up if the traffic
airplane is in a climb at a rate more than or equal to 500 fpm.
The arrow does not show for rates less than 500 fpm.
TCAS Messages
The ND can show these messages for TCAS:
* TFC shows in cyan in the CTR MAP and EXP MAP, VOR and
APP modes. It shows the TCAS traffic display is active. The
TFC switch on the EFIS control panel must be set to ON.
* TA ONLY shows in cyan and in all modes. It shows that TCAS
is not calculating RAs. It shows if the TFC switch on the EFIS
control panel is set to ON or OFF.
* TCAS TEST shows in cyan and in all modes. It shows that
TCAS is in the test mode. It shows if the TFC switch on the
EFIS control panel is set to ON or OFF.
* TCAS TEST FAIL shows on two lines when in test mode and
the TCAS has a failure. TCAS and FAIL show in amber and
TEST shows in cyan. It shows if the TFC switch on the EFIS
control panel is set to ON or OFF.
* TCAS FAIL shows in amber and in all modes. It shows that
TCAS has failed. The TFC switch on the EFIS control panel
must be set to ON.
* TCAS OFF shows on two lines in amber and in all modes. It
shows that the ATC mode switch is not in TA or TA/RA. It
shows if the TFC switch on the EFIS control panel is set to ON
or OFF.
OFFSCALE
The OFFSCALE message shows on the ND when an RA or TA is
outside the current ND display area. The TFC switch on the EFIS
control panel must be set to ON to show the OFFSCALE
message. If an RA is outside the ND range, the OFFSCALE
message shows in red. If a TA is outside the ND range, the
OFFSCALE message shows in amber. If both a TA and RA are
outside the ND range, the OFFSCALE message shows in red.
This message shows in these navigation display modes:
* Center (CTR) MAP
* Expanded (EXP) MAP
* Expanded (EXP) VOR
* Expanded (EXP) APP.
TRAFFIC
The red TRAFFIC message shows any time there is an RA. The
amber TRAFFIC message shows any time there is a TA and no
RA. The TRAFFIC message shows in all ND formats with the
TFC switch on the EFIS control panel set to ON or OFF.
TCAS - NAVIGATION DISPLAY
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
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