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Enstrom TH-28/480 Series Maintenance Manual Supplement 8
G1000H Integrated Flight Deck System
Rev. 1, Jan 25/18
Page
2-1
GTS 800 TRAFFIC ADVISORY SYSTEM
SECTION 1
SYSTEM DESCRIPTION
2.1
System Description
The GTS 800 is a microprocessor-based LRU that uses active interrogations of Mode C
transponders to provide Traffic Advisories (TA) to the pilot. The GTS 800 will be interfaced to the
GTX 33H with extended squitter (which provides 1090 MHz ADS-B transmit capability) to add
passive surveillance capability. Traffic is displayed on the GDU 1040H MFD via an ethernet
HSDB. An aural alert is also provided to inform the crew that a TA is being displayed.
The GTS 800 installation includes two antennas. A top-mounted directional antenna (GA 58) is
used to derive bearing and altitude of the intruder aircraft. Top antenna transmitted interrogations
are directional, reducing the number of transponders that receive the interrogation thus reducing
potential garble on the 1090 MHz band. Bottom antenna transmitted interrogations are omni
directional, using a monopole antenna (CI 105-6).
Power to the GTS 800 system is provided via the TAS (CB162, 7½ amp) circuit breaker located
on the left side of the circuit breaker panel (Figure 16).
Refer to Figure 2
for the GTS 800 unit location and Figure 6 for the antenna locations. Refer to
28-AC-061 Rotorcraft Flight Manual Supplement for GTS 800 operation.
2.1.1
Vendor Publications
The following components listed in Table 5 are to be operated and maintained I/A/W the
current vendor’s instructions to ensure the continued airworthiness of the aircraft.
Table 5. GTS 800 Vendor Manuals
COMPONENT PUBLICATION
VENDOR
GTS 800
GTS 8XX/GPA65
Installation Manual, 190-
00587-00, latest revision
Garmin International, Inc.
1200 E. 151
st
Street
Olathe, KS 66062 USA
Telephone: 913-397-8200
G1000H Integrated Avionics
System Standard
Maintenance Manual, 190-
01739-00, latest revision
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