Garmin GTX 327 Installation Manual

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Page 8 GTX 327 Installation ManualRev J 190-00187-022.3.3 Installation Approval Considerations for Pressurized AircraftAntenna and cable installations on pressurized cabin aircraft require FAA approved installation designand engineering substantiation data whenever such installations incorporate alteration (penetration) of thecabin pressure vessel by connector holes and/or mounting arrangements.For needed engineering support pertaining to the design and approval of such pressurized aircraft antennainstallations, it is recommended that the installer proceed according to any of the following listedalternatives:1. Obtain approved antenna installation design data from the aircraft manufacturer.2. Obtain an FAA approved Supplemental Type Certificate (STC) pertaining to and valid for thesubject antenna installation.3. Contact the FAA Aircraft Certification Office in the appropriate Region and request identificationof FAA Designated Engineering Representatives (DERs) who are authorized to prepare andapprove the required antenna installation engineering data.4. Obtain FAA Advisory Circular AC-183C and select (and contact) a DER from the roster ofindividuals identified thereunder.5. Contact an aviation industry organization such as the Aircraft Electronics Association and requesttheir assistance.