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1 Dec 2003
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7
MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
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Table
7 gives data related to sensitivity level determinations and Figure
3 gives data related to
the conditions for resolution and traffic advisory limits compared to sensitivity levels. This data
is used as a reference during this manual
Table 7. TCAS Sensitivity Level Determinations
Mode
Description
Sensitivity
Level 0
Sensitivity level is set in automatic mode by the altitude or by the ground
command. Sensitivity level 0 is set manually when the control unit function switch
is in the TA/RA mode position (in-flight). This selection sets all TCAS surveillance,
tracking, and resolution advisory functions.
Sensitivity
Level 1
TCAS stops all surveillance, tracking, and resolution advisory functions in
sensitivity level 1. The traffic advisory display is blanked, but for a STANDBY
mode annunciation. The conditions for sensitivity level 1 are any one of the
following:
(1) CTA-100A or KFS-578A Control Unit function switch is set to TEST, STBY, ALT
OFF, or ALT ON.
(2) CTA-100A Control Unit function switch is set to ATC 1 TEST, ATC 1 STBY,
ATC 1 ON, or any ATC 2 position, or ALT SOURCE switch set to OFF
position.
(3) TCAS is in STANDBY mode or TEST mode.
(4) TCAS has failed.
Sensitivity
Level 2
TCAS does surveillance and tracking functions in sensitivity level 2. TCAS gives
traffic advisories only. The conditions for sensitivity level 2 are any one of the
following:
(1) Own aircraft is in-flight and TA or TA/RA is below 1000 feet above ground level
(AGL).
(2) Own aircraft is in-flight and transponder/TCAS control unit is set to TA.
(3) Own aircraft is on the ground and transponder/TCAS control unit is set to TA or
TA/RA.