Trig Avionics TT31, Инструкции по модификации

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Generic TT31 Minor Modification 21 February 2008
SUP/TT31/001 Issue 1.6
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Trig Avionics Limited Page 1
1. Preface
1.1 Purpose
To document the minor modification to replace a Mode A/C transponder with a Trig Avionics TT31
Mode S transponder.
1.2 Scope
This minor modification applies to unpressurised single engine piston aeroplanes with fixed landing
gear and 14 Volt or 28 Volt DC electrical systems, having an existing certified Mode A/C transponder
installation, and an existing altitude encoder. It also applies to simpler retractable aircraft which lack
switchgear required to derive an accurate “on the ground” indication, and which are therefore treated
for the purposes of this installation as fixed gear aircraft.
1.3 Changes from Previous Issue
Section Change
Section 1.5, Document Cross-
References Added Annex I Type Minor Change approval list.
Section 3.5, Wiring Diagram Corrected error in pin-out numbering.
1.4 Changes Forecast
None.
1.5 Document Cross-References
1.5.1 Internal Documents
00455-00 TT31 Installation Manual Issue AC
SUP/TT31/006 Type approved list for TT31 Minor Change approval Issue 2.0
DEV/TT31/199 Declaration of Design Performance for TT31 Mode S
Transponder Issue 5.0
1.5.2 External Documents
CS-23 Certification Specifications for Normal, Utility, Aerobatic,
and Commuter Category Aeroplanes EASA
CAP747 Mandatory Requirements for Airworthiness CAA
ED-73B MOPS for SSR Mode S Transponders Eurocae
TGL 13 Certification of Mode S Transponder Systems for
Elementary Surveillance JAA
1.6 Abbreviation and Acronyms
The following abbreviations and acronyms are used in this document:
AFM Aircraft Flight Manual