Samionics is located at Eskilstuna Airport (ESSU) about 100km West of Stockholm. Our mission is to provide service and support for aircraft and helicopters regarding avionics, trouble shooting, service, repair and installation.

Experience from bench repair of most GA avionics from the well known Bendix/King KX170 generation up to todays products such as Garmin G1000/G500 in Diamond DA40/42, Cessna & Mooney.

We have installed about 100 Garmin GNS430/530 units, audiopanels, COM’s and NAV’s. Several Aspen Avionic EFD1000PRO EFIS installations. Stormscope WX-500, S-Tec 55X autopilots, Artex and Kannad 406 ELT’s. We have EASA approvals for Trig Avionics TT31 Mode-S transponder (KT76A replacement) in C208, PA34 and Beech multi engine piston aircraft.

So far we have produced over 60 EASA Part-21 minor change approvals – done by us at a very cost effective price.

The history of the avionic work shop named Telfi Radio started for many years ago… The shop has been moved back and forth between Eskilstuna/ESSU and Västerås/ESOW. Due to the financial collapse in the early 1990’s the company faded away for a year or two but then was put back in business 1995 when the remains was bought by Nord Flyg Service.

The previous owner Stefan Jägersund and one of its old employees Hasse Esbjörnsson helped in rebuilding the avionic shop. The business was quite small so there was only enough work for one full time employed and that came to be – Sam Yrlund. In 2008 the company Nordflyg Service was sold and the name change to Helicraft Nordflyg Service. In 2014 as a measure of reducing expenses the base/line station in Eskilstuna/ESSU was relocated to the already existing maintenance facility in Nyköping/ESKN. The avionics shop however remains at Eskilstuna Airport under the trade name Samionics.

Repairing old avionics may become very expensive. Older transponders with defective transmitter cavity tubes should be replaced for modern Mode-S transpondes with solid state transmitters.

Many still dont know that for IFR you MUST have an ICAO Annex 10 fm immunity approved VOR/LOC recevier. For new COM installations 8.33kHz spacing cabability is required.

So what can we do for you? Well most of all – cut down expenses. We aim to have very low costs, providing you best prices and get the job done. By this we are helping you one step closer getting that avionics package you have dreamt of installed.


Please support our business by letting us do your next avionics installation.

Sam Yrlund
Avionics and Maintenane manager