ADSB Equipment Legality Question?

[walrus]

I have a question regarding the use of Dynon Skyview equipment for ADSB. The Skyview transponder is certified, so that is OK. The Dynon GPS it  uses for full ADSB (SIl =2, SDA = 3) is not certified but the combination is accepted by the FAA as meeting their ADSB standards (CFR whatever) - the Dynon manuals specifically state this, as does their software setup screen.

 

CAO 20.18 requires that GPS position sources meets clause 3 of Part B of  Appendix XI - Transmitting Equipment. This says that the GPS must be an IFR capable unit covered by one of TSO's 145, 146 or 196. Folks, these are very expensive. Think $3000+++.

 

BUT. CASA appears to have a let out clause for RAA type aircraft (described as certain light sport, etc.):

 

Quote

9B.12     A requirement under Appendix XI, XII, or XIII that an approved equipment configuration for ADS-B transmitting equipment be authorised in accordance with a specific TSO or ETSO does not apply to the ADS-B transmitting equipment carried on certain light sport, experimental and other aircraft provided that:

(a)   the equipment configuration that is carried provides the pilot, other aircraft and ATC with the same transponder and surveillance capability as would be provided if the equipment were expressly authorised in accordance with the specific TSO or ETSO; and

(b)   the pilot or the operator has a statement of conformance (however described) from the equipment manufacturer stating the particular standard or standards of the TSO or ETSO with which the equipment conforms.

 

 

 

This inclines me to believe that he Dynon statement is a "statement  of conformance (however described)" as specified in 9B.12 (b) because it is stated in the installation manual that the installation complies with U.S. 14CFR 91.227. and the GPS meets TSO166b performance specs.

 

If this is correct, then it should be legal to use the Dynon equipment to provide a full ADSB out system (SIL=2 ,SDA=3) as accepted by the FAA.

 

What do you think? Is it kosher?

 

 

 

 

 

 

 

[KRviator]

I've had Dynon in my RV broadcasting full ADS-B out for years using the GPS-2020 antenna, relying on the provisions of CASR 21.470. Essentially, the installation (modification) is approved by the FAA, so CASA automatically recognizes it, notwithstanding the provisions of CAO20.18.

 

Quote

Foreign modification/repair designs
A design for a modification of, or repair to, an aircraft, aircraft engine, propeller or appliance is taken to have been approved for the purpose of these Regulations if the design is:

                     (a)  approved by the national aviation authority of a recognised country; or

                     (b)  for a design of a modification or repair that relates to an aircraft, aircraft engine or propeller designed in a recognised country--published or issued by the foreign type certificate holder of the aircraft, aircraft engine or propeller under a system approved by the national aviation authority of that country; or

                     (c)  for a design of a modification or repair that relates to an appliance designed in a recognised country--published or issued by the manufacturer of the appliance under a system approved by the national aviation authority of that country; or

                     (d)  accepted by CASA under an agreement (however described) regarding approvals of designs for modifications and repairs between:

                              (i)  CASA and the national aviation authority of a Contracting State; or

                             (ii)  Australia and a Contracting State.

 

Edited February 11, 2021 by KRviator

[walrus]

Thank you for the advice, I guess that is the way I have to go.