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TT31 Minor Change Library

At Trig we have developed a set of EASA approved upgrade instructions that document the process of installing the TT31 transponder in a range of aircraft. Trig installers can use these instructions to achieve airworthiness compliance without needing to seek further approval from EASA.

These Minor Change Approvals are free.

First – we suggest that you look at the Aircraft Approved Type List within the Minor Change Approval Summary Sheets (below). Use this to verify that your specific aircraft model is featured within the Minor Change Approval.

Next – find your specific aircraft model from the individual aircraft links (at the foot of this page). Clicking on each link takes you to the EASA Minor Change Approval Certificate.

Finally – The Minor Change Approval Certificate for your aircraft will indicate the relevant ‘Associated Technical Document’ that must be followed as part of the installation. Please see the relevant technical document in the Minor Change Master Instructions  section below.

Minor Change Approval Summary Sheets

Certain approval certificates include standard text inserted by EASA which says “The installation of this modification by third persons is subject to written permission of the approval holder”.  For the avoidance of doubt, we hereby grant that permission, and this web page may be referred to as evidence of that permission.

For space reasons, both the EASA Approval Sheets and this web page have abbreviated some sub-type information, where aircraft model variant approvals still apply.  The following master documents show the complete list of all approved EASA models and variants for those types.

Fixed Wing (CS-23) Aircraft Approved Type List (revision 2.0)

Powered Sailplane (CS-22) Aircraft Approved Type List (revision 1.0)

If you are installing a TT31 transponder in an aircraft type NOT shown here, but for which the minor change instructions would apply, Trig Avionics grant you permission to use the published minor change instructions as the basis for your own application.

Minor Change Master Instructions

The Minor Change Master Instructions are available for download here.

Fixed Wing (CS-23) TT31 Minor Change Instructions (latest revision, issue 1.6).

Fixed Wing (CS-VLA) TT31 Minor Change Instructions (latest revision, issue 2.0).

Powered Sailplane (CS-22) TT31 Minor Change Instructions (latest revision, issue 2.0).

Small Rotorcraft TT31 Minor Change Instructions (latest revision, issue 4.0).

As our library of Minor Changes has expanded we have responded to questions from our installers. As a result we have made improvements to these Master Instructions. The information in the latest revisions are still applicable to all the Minor Changes listed below. Because there is information in the latest document that is not included in the earlier revisions we recommend that installers refer to the latest document. For completeness however the previous versions of the Fixed Wing instructions are still available for download: (Fixed Wing Issue 1.4) or (Fixed Wing Issue 1.5)

Alenia Aermacchi

F260, S205, SF260TP

Alpha

HR200, R2100, R2112, R2120, R2160

American Champion

8KCAB

AMS

Carat A

Apex Aircraft

ATL, CAP10, CAP20, CAP21, CAP230, CAP231, CAP232, DR220, DR221, DR250, DR253

Aquila

AT01

Aviat

A-1A, A-1B, Pup

Beagle

B121 Pup

Beechcraft

19A, 19B, 19M, 23, A23, C23 E33, E33C, J35, K35, N35, P35, S35, V35, V35A, V35B, 35-33,35-B33, 35-C33, 35-C33A, 36, A36, A36AT, A36TC, B36TC, 77

Bell Helicopters

206 series, 407

Bölkow

BO208BO209

Cessna

C120, C140, C150, C152, C170, C172, C175, C177, C180, C182, C188, C206, C207, C210,

Individual subtype letters have been omitted for space reasons. All these Cessna approvals cover the complete series and where appropriate apply to aircraft manufactured in either France or the USA.

Cirrus

SR20SR22

Constuctii Aeronautice

IS-28

Diamond

DA20-A1, DA20-C1, DV20, DA40, H-36 Dimona, HK36, HK 36 Super Dimona

EADS Deutschland GmbH

SIAT 223

E.I.S. Aircraft GmbH

RF5, RF5 B, RF4 D, SFS 31

Eurocopter

AS350B, AS350 B1, AS350 B2, AS350 B3, AS350 BA, AS350 BB, AS350 D, EC130 B4

Evektor

L 13

Extra

EA300, EA300/L, EA300/S, EA300/200

FLS Aerospace Ltd

Club Sprint

Fournier

RF 10, RF 3, RF 4

Fuji

FA200-160, FA200-180, FA200-180AO

Gardan

GY80-150, GY80-160, GY80-180

General Avia

F20, F22A, F22B, F22C, F22R

Grob

G109, G115, G120

Grumman

AA-1, AA-1A, AA-1B, AA-1C, AA-5, AA-5A, AA-5B, AG-5B

HB Flugtechnik

HB 21, HB 21/2400, HB 21/2400 B, HB 23/2400, HB 23/2400SD, HB 23/2400 Scanliner, HB 23/2400 V2

Maule

M-4, M-4-210C, M-5-210C, M-5-235C, M-6-235, M-7-235, MX-7-180, MX-7-235, MXT-7-180,MX-7-180A, MXT-7-180A

M&D Flugzeugbau

AVO 68 Samburo

Mooney

M20 Series

Morane-Saulnier

MS880, MS883, MS892, MS893, MS894 (Rallye)

Moravan (Zlin)

Z142, Z42, Z43, Z143, Z50, Z242, Z126, Z226, Z326, Z526, Z726

Pilatus

PC-6

Piper

J3, PA-12, PA-18, PA-22, PA-24, PA-28, PA-32, PA-38-112

Individual subtype letters have been omitted for space reasons. All these Piper approvals cover the complete series.

PZL

M18, M26, M28, PZL-101, PZL-102, PZL-104 Wilga, PZL-106, PZL-Kruk, Koliber 110, 150

Robin

DR300, DR315, DR340, DR360, DR380, DR400, DR500, HR100 and HR200, R1180, R2100,R2100A, R2160D, R3000

Robinson

R22, R44

Rockwell Commander

112, 112TC, 114, 114TC

Scheibe

SF 25SF 36

Siai Marchetti

260, 260B, 260C, 260D, 260E, 260F

Slingsby

T67A, T67B, T67C, T67M

Socata

TB9, TB10, TB20, TB21, TB200, Rallye 100, 110, 150

Stemme

S 10

Symphony

OMF-100-160

Technoflug

CARAT

Tecnam

P2002JF, P2002JR

Wassmer

WA4, WA40, WA41