FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft King Air 300/300LW 190-00716-03 Rev.4
Page 148 of 167
GTS 8000 TCAS II
Refer to the GARMIN Pilot’s Guide and Cockpit Reference Guide, P/N 190-01343-01 and 190-01344-01
Rev. A or later FAA accepted revision for complete detailed descriptions of the GARMIN GTS 8000 TCAS
II system function and operating instructions.
System Description
The TCAS II is an on-board collision avoidance system that identifies and displays aircraft that are
potential collision threats. The GTS 8000 can issue resolution advisories (RAs) in the form of vertical
maneuver guidance on the pilot and copilot’s vertical speed indicators, in addition to aural messages.
Using transponder replies from threat aircraft, the GTS 8000 determines relative altitude, range, and
bearing of any ATCRBS or Mode S equipped aircraft with altitude reporting capability. Using this
information, the GTS 8000 will determine the type of advisory to issue. ATCRBS equipped aircraft that
only reply with Mode A information will not provide altitude information. Therefore, the GTS 8000 will not
issue resolution advisories for these aircraft, but can issue traffic advisories. The GTS 8000 will not
detect aircraft that are not equipped with transponders.
The GTS 8000 TCAS II components as installed in the King Air 300/300LW consist of:
 A TCAS II processor
 A TCAS II compatible Mode S Transponder. As installed in the King Air 300/300LW with a
G1000 system, the GTX 3000 transponder is used.
 One top mounted antenna,
 One bottom mounted antenna
 A radio altimeter
 Controls provided via the GDU 1040 and GDSU 1500 display units
The TCAS II provides two levels of advisories:
1. If the traffic gets within 25 to 48 seconds (depending upon altitude) of projected Closest Point of
Approach (CPA), it is then considered an intruder, and an aural and visual traffic advisory (TA) is
issued. This level calls attention to what may develop into a collision threat using the traffic map
displays and the aural message, “TRAFFIC - TRAFFIC.” It permits mental and physical preparation
for a possible maneuver to follow, and assists the pilot in achieving visual acquisition of the intruding
aircraft
2. If the intruder gets within 15 to 35 seconds of CPA (depending on altitude), it is considered a threat
and an aural and visual resolution advisory (RA) is issued. The RA provides a recommended
vertical maneuver using VSIs located on each PFD, and voice messages to provide adequate
vertical separation from the threat aircraft, or prevents initiation of a maneuver that would place the
TCAS II aircraft in jeopardy. The GTS 8000 TCAS II is considered a backup system to the “SEE
AND AVOID” concept and the ATC surveillance.
When a TCAS II RA is issued, the pilot should immediately disconnect the autopilot and pitch the aircraft
in the direction that will result in a vertical speed in the green band on the VSI. The flight director will
NOT provide guidance to comply with the RA command.
The TCAS II RA algorithms are based on the pilot initiating the initial 0.25 g acceleration maneuver within
approximately 5 seconds. Pilot response is expected within approximately 2.5 seconds if an additional RA
is issued (The increase rate and rate reversal RAs are based on a 0.35 g acceleration maneuver.).