<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
This is the procedure in our FSDO region for already-flying experimental
aircraft for GPS IFR certification:

1. Submit form 337 (major repair or alteration) to FSDO, signed by an IA,
describing the physical installation of the GPS.  Also submit Flight Manual
Supplement (sample FMS comes with GPS), copy of the STC, GPS ground test
form, and Instructions for Continued Airworthiness form.

2. When 337 and Flight Manual Supplement are approved, submit second 337,
signed by an IA, describing how the GPS installation complies with
applicable FARs regarding GPS IFR certifications.  Approval of the second
337 is the final approval for IFR certification.

This is the procedure in our (Dulles) FSDO, and FSDO inspectors vary greatly
in their requirements.  The most painless way to proceed is to speak to the
avionics inspector at your FSDO before starting the work, and ask him what
he looks for.  Some inspectors require much less than others (Dulles is
probably one of the most strict).  Also obtain a copy of AC 20-138, which
describes the requirements for GPS IFR certification in detail.

David Buckwalter
Avionics Systems
<www.avionikits.com>


>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>