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CSP A--013
MASTER
A. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Air Traffic Transponder
XPDR 1 DC ESS 4 D5
Control XPDR 2 DC BUS 2 2 H8
REV 56, Jan 31/03
Vol. 1 18--60--10
NAVIGATION SYSTEMS
Air Traffic Control Transponder System
Flight Crew Operating Manual MASTER
CSP A--013
THIS PAGE INTENTIONALLY LEFT BLANK
Vol. 1 18--70--1
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual
CSP A--013
MASTER
1. TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM
The traffic alert and collision avoidance system (TCAS) is an airborne system that
interrogates the air traffic control transponders of nearby aircraft to identify and display
potential and predicted collision threats. TCAS surveillance range is up to 40 nautical miles
and can detect and track up to 30 aircraft simultaneously. The system computes range,
bearing and closure rates of other transponder equipped aircraft.
A mode “S” Transponder provides air-to-air communications for coordinating the resolution
maneuvers between TCAS equipped aircraft. The TCAS system provides no indication of
traffic conflicts if the intruder aircraft is without an operative transponder.
TCAS provides symbology that depicts surrounding aircraft in terms of relative altitude,
range, clock position, and vertical rate. The flight compartment displays also provide data
on closure rates. The system displays four types of traffic.
The display control panels are used to activate TCAS and to set range display. Weather
radar data can be overlaid on the multifunctional display, in TCAS mode.
TCAS mode and altitude format are displayed on the top level page of the radio tuning units.
Testing and setting changes are made on the TCAS main page.
Traffic Collision Avoidance System --- Threat Level and Data Tags
Figure 18---70---1
TCAS DISPLAY THREAT LEVELS AND DATA TAGS
THREAT LEVEL
DEFINITION
Intruding aircraft 25
seconds from closest
point of approach
Intruding aircraft 40
seconds from closest
point of approach
Any traffic within TCAS
range limit
+00
THREAT
SYMBOL COLOR LEVEL CAUSE
Resolution
Advisory (RA)
Traffic
Advisory (TA)
Proximate
Traffic
Other Traffic
Intruding aircraft is above by
100 feet and descending at
least 500 feet per minute
Traffic below 1,200 feet and
climbing at least 500 feet
per minute
Intruding aircraft level
with and not climbing or
descending
RED
AMBER
CYAN
CYAN Traffic above 2,700 feet and
descending at least 500 feet
per minute
+01
--12
+27
REV 56, Jan 31/03
NAVIGATION SYSTEMS Vol. 1 18--70--2
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual MASTER
CSP A--013
Traffic Collision Avoidance System Interface <MST>
Figure 18---70---2
PSEU
GPWS
RAD ALT 1/2
IRS 2
EICAS
(FDR)
AECU
IAPS
(MDC)
TA/RA TA/RA
AIR/GROUND
LOGIC
AURAL
PRIORITY
TA ONLY
HDG
AURAL
WARNINGS
TA/RA
COORDINATION
& CONTROL
MODE S
XPNDR
ATC 2
ADC 1
ADC 2
ALT ALT
TCAS
RTU 2
BRT
RTU 1
MODE S
XPNDR
ATC 1
BRT
BRT
DIR
ANT
CB3--C1
TCAS
AHRS 2 HDG
<0025>
IAPS
OMNI
AC ANT
ESS
BUS
HEAD--UP
GUIDANCE
SYSTEM
<0026>
<0094> <0094>
Vol. 1 18--70--3
REV 56, Jan 31/03
NAVIGATION SYSTEMS
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual
CSP A--013
MASTER
Traffic Collision Avoidance System --- Controls <MST>
Figure 18---70---3
TFC (TCAS)
Used to directly select TCAS
traffic display on MFD.
RANGE -- Inner Selector
Used to select range displayed
on MFD. Range selections are:
5, 10, 20 and 40 NM.
Display Control Panel
Pilot’s and Copilot’s Side Panels
<0040>
REV 56, Jan 31/03
NAVIGATION SYSTEMS Vol. 1 18--70--4
Traffic Alert and Collision Avoidance
System
Flight Crew Operating Manual MASTER
CSP A--013
Traffic Collision Avoidance System --- Radio Tuning Unit <MST>
Figure 18---70---4
Radio Tuning Unit -- Top Level Page
Center Pedestal
TCAS Mode (cyan)
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