UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED
ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1
Rev.
5
7-1
Apr
15/15
CHAPTER 7
GTX 330 TRANSPONDER WITH ADS-B OUT
SECTION 1
SYSTEM DESCRIPTION
1-1. System
Description
A. The GTX 330 with ADS-B Out is installed as part number 28-22028-1. The components
of the GTX 330 installation include the panel-mounted GTX 330 unit and a bottom-
mounted antenna.
NOTE
When combined, the Garmin GTX 330 with Extended Squitter (ES) and
the Garmin GTN 650 GPS/NAV/COM have been shown to fully comply
with AC 20-165A and 14 CFR 91.227 when installed in accordance with
Garmin’s installation instructions. This configuration will be
compliant with the 2020 ADS-B Out mandate defined in 14 CFR 91.225.
B. For ADS-B Out system functionality, the GTX 330 is configured with the extended squitter
(ES) feature and is interfaced with the GTN 650 for position input and the A-30 altitude
encoder for barometric altitude input. The GTX 330 performs the following ADS-B Out
functions: Transmission of ADS-B Out data on 1090 extended squitter (1090ES) (1090
MHz), Integration of data from internal and external sources to transmit data as required
per 14 CFR 91.227, and Pressure Altitude Broadcast Inhibit.
C. The GTX 330 may also be interfaced to other equipment such as an audio panel or VOX
ICS and an OAT probe.
D. Power to the GTX 330 installation is provided via the
XPNDR
circuit breaker (CB33) (5
Amp) located on the left side of the center pedestal.
E. Refer to the F-28F/280FX Rotorcraft Flight Manual Supplement 28-AC-070 for GTX 330
with ADS-B Out limitations and basic operation instructions.
F. The following component listed in Table 7-1 is to be operated and maintained I/A/W the
current vendor’s instructions to ensure the continued airworthiness of the aircraft.
Table 7-1. Vendor Manuals
Component Publication
Vendor
GTX 330 Transponder
GTX 330 Installation Manual, Document No
190-00207-02, latest revision
Garmin International, Inc.
1200 East 151
st
Street
Olathe, KS 66062
Tele: (913) 397-8200
Fax: (913) 397-8282
www.garmin.com
GTX 330 Pilot’s Guide, Document No. 190-
00207-00, latest revision
GTX 330/D Maintenance Manual,
Document No. 190-00207-05, latest
revision
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