Normal Procedures; General; Before Takeoff - Garmin GTX 345 Operator's Manual

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2-1. General

Refer to the basic RFM for procedures not specific to the
GTX 345.
The ADS-B Out system is a single point of entry system for
Mode 3/A code, Flight ID, IDENT functionality and
activating or deactivating emergency status for both
transponder and ADS-B Out functions. Parameters are set
in the transponder at the time of installation and are
automatically incorporated in ADS-B Out broadcasts.

2-2. Before Takeoff

The ADS-B Out system must be operational
("NO 1090ES TX" annunciator extinguished
before takeoff) in certain airspaces after
January 1, 2020, as specified by 14 CFR
91.225. Requirements outside of the US may
vary based on local regulations.
The annunciation "NO 1090ES TX" appears in
the lower left corner of the GTX 345 when the
ADS-B TX is manually turned off or when there
is a transmission malfunction.
1. GTX Mode – Verify ALT.
2. "NO 1090ES TX" annunciation – extinguished.
FAA Approved: Dec 19/18
Report No. 28-AC-078
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ENSTROM 480B RFM SUPPLEMENT
CHAPTER 2. NORMAL PROCEDURES
level of this Rotorcraft Flight Manual Supplement.
NOTE
NOTE
2-1
Dec 3/18