2) You have the EFIS and the Trig transponder. In addition you have the SP-12 TABS
GPS module connected to the
SAME
CAN bus as the Trig transponder interface.
Ensure all three devices have firmware updated to at least the firmware levels
mentioned in this document.
In this case your ADS-B transmissions are compliant to SIL/SDA of 3/2 and TABS
TSO-C199 for a Class-B device. This
DOES
meet 14 CFR §91.227c, AC 20-165B,
Appendix B requirements.
In this case all ADS-B related transmission data items are set as required in DO-260B
based on the data sent by the SP-12 GPS to the Trig interface. In this case the data is
NOT
routed via the EFIS and the link remains operational even with the EFIS switched
off.
Note: In this case the GPS in the EFIS is still being received by the Trig interface as
well. The Trig interface
SHALL
use the position and accuracy data from the SP-12 if it
has a valid fix. The Trig interface
SHALL
default to the position and accuracy data from
the EFIS as backup should the position from the SP-12 not be valid. In this case the
provisions of section 1) above applies.
Other documents to reference
Please view the documents titled:
SP-12.pdf – User and installation manual for SP-12 GPS module
MGL Avionics Trig Transponder interface.pdf
Both documents are available for download from the MGL Website.
