GAD42 Needs Service CAS Advisory I can't put my IFD5XX/4XX into Maintenance Mode from Flight Mode. IFD Connected to Aspen EFD1000 Causes Aircraft To Fly 1 Dot Left On GPS APR IFD540/440 VHF Weak Tx or Rx IFD5xx/4xx displays No TIS-B message (TIS-B in a circle with a line through it) Installing IFD options problem - Load says "IFD appears to not be installed in aircraft Nxxxxx" Issues with Fit/ Alignment of connectors during installation of IFD5XX. Uncommanded actions on the IFD VHF Breaking Squelch Troubleshooting Vertical and Lateral Deviation Flashing Behavior IFD550 SVS Page and HSI with dual Install