iFly GPS Forum

I have have the NavWorx ADS600-B in my Grumman Cheetah and recently disconnected the UAT transmission using the guidance that John Austin provided in his request for an AMOC from the FAA.  I made a flight a couple of weeks ago with the out function disabled but was still receiving some traffic.  From all indications the procedure that John provided works to allow the NavWorx to receive.  I request a PAPR from the FAA but got no response leading me to believe that the unit is not transmitting.   I am about to install a Garmin GDL-82 UAT transceiver.  Upon completion I will continue to use the NavWorx for traffic and weather reception but will have the Garmin provide the UAT transmission function.  

If I recall the AD correctly, you can leave it in place if the breaker is removed and wiring harness disconnected?  There might be a requirement for a placard, too, but I don't remember for sure (check the AD).  You could then leave it in the plane until you got an AMOC.

Ordinarily, I'd agree that the FAA could care less what, if any, ADS-B receiver you have - it is a passive device, not required, etc.  However, the NavWorx ADS600-B and ADS600-EXP are UAT/transceivers and are specifically referenced in an AD.  The AD makes no allowance for alteration of the NavWorx unit ... that's what an AMOC (Alternative Means of Compliance) provides for.  IMHO if you were in an accident, ramp check, etc. where an overly zealous inspector was looking for infractions, a NavWorx ADS600-B or ADS600-EXP that is still wired and powered, regardless of its operational status (and without an AMOC) would be a violation of the AD.  Ironically, I agree that any other ADS-B receiver except for a NavWorx would be perfectly legal.  However, past precedents have clearly been established by the FAA that equipment subject to an AD - altered or not -  that is simply re-labeled, altered, or called something else is not allowed and the equipment is still subject to its original AD.  The likelihood of using the NavWorx as an undocumented receiver being a "real" issue is almost zilch, but the original question was whether it would be legal or not - it would not in this case.

I applied for and received an AMOC for the ADS600-EXP.  It is a global AMOC, which means anyone can use it.  You just comply with the AMOC, notify your FSDO (notify ... not asking permission!), and make the logbook entry per the AMOC and you're good to go.  Kyle Cobble (817-222-5172) is the FAA official most familiar with the AD and the AMOC.  Kudos to Kyle for being extremely helpful in developing and obtaining the AMOC!  I think it would be very simple to get an AMOC for the ADS600-B as it is virtually identical to the ADS600-EXP internally and apparently the deactivation process of the transmitter would work exactly the same as done in the ADS600-EXP.