Astronautics RoadRunner AFI4700, Pilot'S Manual

Page: 71 / 91

PLG12863E
AFI4700 Pilot’s Guide
71
Table 3-13: TCAS Modes
Modes Description
TCAS
TA
The TCAS system indicates that only traffic
advisories are available and resolution advisories
are not available.
TCAS
TST
The TCAS indicates test mode is active.
TCAS
OFF
The TCAS system indicates it is off.
Table 3-14: TCAS Submodes
Submodes Description
FL __
TCAS
The TCAS system indicates the altitude state is
Absolute. Threat symbols are displayed with
absolute altitude instead of relative altitude.
ABV _
TCAS
The TCAS system indicates it is operating in “look
up” mode where traffic detected –2,700 ft and
+9,000 ft of ownship is displayed.
BLW _
TCAS
The TCAS system indicates it is operating in “look
up” mode where traffic detected –9,000 ft and
+2,700 ft of ownship is displayed.
THRT _
TCAS
The TCAS system indicates that only threats will
be displayed. Normal Proximate and Other traffic
will be suppressed.
3.3.7.3
Offscale Intruders
When the TCAS detects a TA intruder that cannot be displayed on the
HSI due to the selected range, the EFI will annunciate “OFFSCALE” in
the top left corner of the HSI. Additionally, the EFI will display the
intruder symbol on the edge of the HSI. This, in conjunction with the
“OFFSCALE” annunciation, represents that the intruder is at a
distance beyond the other range ring. If the HSI range is increased
beyond the intruder, the “OFFSCALE” annunciation will be removed
and the intruder symbol will be displayed normally on the HSI.