New - TT31 Mode S Transponder
The new TT31 is a power-efficient, inexpensive, Mode S transponder that meets the European elementary surveillance requirements. The TT31 fits in the same mounting tray as the KT76A & KT78A transponder, making it a great choice for either upgrades or new installations.

- European Mode S
- Low Power Consumption
- No Cavity Tube
- 240 Watts Nominal Output
- Plug and Play Installation
- Backlit LCD Display
- Easy to Use Rotary Knobs
- Timer/Stopwatch Function
- Altitude Monitor
- Supports 1090ES ADS-B out
- The TT31 is TSO approved for fitting to European and FAA registered aircraft.

All Mode S transponder upgrades for EASA certified aircraft must be carried out by a licensed engineer using a Minor Change approved by EASA. The TT31 plug and play design minimises the cost and downtime for the upgrade, and our library of pre-approved Minor Changes for popular aircraft types means that for many customers there are no EASA fees to pay either! Contact Aerosupply for more information.