Six months ago, I replaced my AFS4500 EFIS with an AFS 5400. After doing that, my avionics A&P noted a small static leak..OK for VFR, not IFR, he said. I then ran a PAPR and it showed a failure in ADS-B barometric altitude reporting (previous PAPR's were fine). Transponder is a GTX327 and the ADS-B is an EchoUAT. Navigator was a 430W, now is an IFD440. Switching the GPS navigator didn't make the problem worse or better.
Thoughts on why this might be happening? Is the static leak part of the problem? Or is it more likely that I've mis-configured the serial ports from the 5400? (I have the 5400 as the PFD and a second 3500 attached to the 5400 via ethernet cable). FWIW, the ADS-B IN trf/wx function of the EchoUAT works fine and displays on the 3500. The only part of the ADS-B OUT that fails is the barometric altitude reporting, and it only fails a percentage of the time, not 100% of the time.
Reply With Quote