I am helping a friend install a GDL 82 with his GTX 327 transponder. The installation manual shows an optional connection for an ADS-B OUT FAIL lamp. Is this really optional, or is it required to have this lamp as part of this configuration?
I seem to recall that when I read the multi-page FAA publication for the ADS-B equipment requirements (a few years ago) that an external FAIL indicator was required if the installation did not provide another means of indicating a failure of the ADS-B system. I also know that some of the L3 equipment requires this FAIL lamp.
Have the requirements changed such that this FAIL lamp is no longer required?
I seem to recall that when I read the multi-page FAA publication for the ADS-B equipment requirements (a few years ago) that an external FAIL indicator was required if the installation did not provide another means of indicating a failure of the ADS-B system. I also know that some of the L3 equipment requires this FAIL lamp.
Have the requirements changed such that this FAIL lamp is no longer required?