On Friday, June 19, 2015 at 9:34:03 AM UTC-7, Darryl Ramm wrote:
I suspect you are one of few A&Ps who would file a 337 for an ELT install in a glider. There is no regulation that I am aware of that controls an ELT install in a glider or clarifies explicitly if an ELT install must be a major or minor install.... You have to make that call. In your case does the FSDO actually look at anything about the ELT performance? Antenna? Ground plane? ELT install orientation? switch location? Look at compliance with the install documentation? (Some of which will be mighty hard to meet).

And to add to that ACK for example promotes the instal of their ELTs being minor installs, e.g. see the FAA letter here http://www.ackavionics.com/pdf/E-04%...all%20Data.pdf Of course there can be cases where it could need a 337.