Software and Service Bulletins for pilots
Improvements and new features are available for your Trig product through software updates. These can be carried out by an Approved Trig Dealer, or suitably qualified installer. If you would like advice about the suitability, or need to update your Trig unit, please contact your local Approved Trig Dealer. They will be able to help you and organise the upgrade of your avionics.
The current version of software installed in your Trig product will be shown on the display at initial power up. Software versions run numerically, the higher the number the more recent the release – so the latest software will always include all the features of earlier versions.
The archive folders within the sidebar contains older versions of software. Once you have viewed an archive page, use the Back Button on your browser to return to this page.
Listed below are the current Trig product Software and Hardware versions.
Please note that Trig software versions use the numbering convention <MAJOR>.<MINOR>. The ‘.’ is not a decimal point. For example, version 1.12 is a later version than version 1.9
TT21 AND TT22 Transponder
17/04/2018 version 2.13
This software improves GPS-only air/ground determination algorithm for ADS-B Out.
TC20 Transponder control head
04/09/2017 version 1.14
This software adds support for Trig TN72 as a 14 CFR 91.227 compliant ADS-B position source and adds GPS only air-ground determination algorithm for ADS-B Out.
TN70 GPS
10/05/2023 version C1.10-1
A limited number of TN70 GPS Position Source units have been identified by Trig as having been affected by a manufacturing error. This service bulletin allows for specific corrective action, allowing the reconfiguration of the IO communication protocol and the hardware modification status marking of the unit.
TY91 AND TY92 VHF RADIOS
12/11/2019 version 1.12
A small number of TY91 and TY92 radios have been found to intermittently mistune the receiver frequency, although the control head has selected, and is displaying the intended channel. The symptoms are that the wanted channel is not received, and depending on the mistune, a different channel might be received. If the mistuned channel is not active, the radio would appear silent. Reselecting the channel, transmitting on the channel, or powering the radio off and on generally corrects the problem.
Software version 1.12 introduces a change to the tuning mechanism to correct this problem. No other radio features are affected, and this software change has no effect on radios that are not experiencing this issue.
TC90 VHF RADIO CONTROL HEAD
06/01/2023 version 1.8
In software versions prior to version 1.8 the step size defaults to 25 kHz whenever the TC90 is switched on. Software version 1.8 remembers the step size, and restores whichever step size was selected (8.33 / 25 / 50) each time the controller is switched on.
TX56 AND TX57 NAV/COM
Software
There are no previous published software Service Bulletins for the TX56 and TX57 (including TX56A and TX57A variants)
Hardware
15/02/2023 Version 1.0
A very limited number of TX56/56A units were shipped with a potentially defective locking cam screw. These units were shipped between 31st October 2022 and 28th November 2022. This hardware service bulletin defines the range of serial numbers affected, indicates the process to identify a defective locking cam screw and provides guidance on the rectification process.
TY96 AND TY97 VHF RADIO
Software
14/08/2019 version 1.9
Software version 1.9 makes the following changes:
1. Reduces the susceptibility to incorrect squelch opening on aircraft with very high levels of RF noise radiating from the ignition system.
2. Has minor improvements to audio performance on received signals.
3. Allows the radio to recall the previous tuning knob step size s(8.33/25h/50 kHz when turned off)
4. Corrects an error when trying to load a frequency database with more than 255 entries.
Hardware
15/02/2023 Version 1.0
A very limited number of TY96A units were shipped with a potentially defective locking cam screw. These units were shipped between 31st October 2022 and 28th November 2022. This hardware service bulletin defines the range of serial numbers affected, indicates the process to identify a defective locking cam screw and provides guidance on the rectification process.
TT31 Transponder
Software
24/09/2018 version 3.18
TT31 software version 3.18 improves performance of Mode S replies to certain interrogations, correcting software versions 3.14, 3.15, 3.16 and 3.17.
Hardware
01/10/2018 version 1.0
This Hardware Service Bulletin applies to TT31 transponders approved under ETSO authorisation EASA.21O.643 Rev B and EASA.21O.906 Rev A, part number 00220-00-(XX) and part number 00225-00-(XX) which are:
- Serial number from 05767 to 09715;
- Modification Level 6 or below;
- Installed in an orientation which is NOT a conventional aft-facing avionics stack mounting.