ENSTROM F-28F/280FX RFM SUPPLEMENT
3-1
FAA Approved: Mar 28/19
Report No. 28-AC-081
Jan 15/19
CHAPTER 3. EMERGENCY PROCEDURES
3-1. General
Refer to the basic RFM.
3-2. Abnormal Procedures
When the GPS/SBAS receiver is inoperative or GPS position
information is not available or is invalid, the GTX will no
longer be transmitting ADS-B Out data.
Figure 3-1 shows when ADS-B is not transmitting.
Figure 3-1. ADS-B 1090 Failed Screen
Figure 3-2 shows if both the transponder and ADS-B are
not transmitting.
Figure 3-2. ADS-B 1090 and Transponder Failed Screen
1. In the event of either a “NO 1090ES TX” or a
“TRANSPONDER FAILED” annunciation, verify valid
position with interfaced GPS position sources.
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