Aircraft maintenance

ASG is both a full EASA Part 145 Subpart G maintenance base and have experienced and qualified FAA IA staff, which entitles us to carry out all maintenance tasks on GA and Business aircraft.

Aircraft upgrades

No matter what aircraft you own, just leave it to ASG for a hassle free arrival, handling and departure. ASG have dedicated stands for larger aircraft and a parking area for GA.


ASG are Garmin, Aspen and STEC dealers and can cater for your every avionic requirement. The bonus with completing your instrument panel upgrade with us is that we won’t charge you VAT.


ASG is both a full EASA Part 145 Subpart G maintenance base and have experienced and qualified FAA IA staff,
which entitles us to carry out all manner of inspections on a wide variety of aircraft types and registrations.

ASG offers Aircraft Engineering Services tailored to each customer’s needs.

Our services


Is your engine coming up on TBO?  We have fitted hundreds of new, factory reconditioned and re-engineered aircraft engines, both piston and turbine.


TBO, prop strike or require a newer more efficient design? We can get your prop into the shop in a couple of days for overhaul or replacement.


If you are undertaking an aircraft closure considering the location is key. ASG is based on the tax-free island of Guernsey.


Call us or even better send us an e-mail with your details and we can have an estimate for free.


With complete FAA and EASA licence coverage, ASG can support all manners of aircraft types.


ASG is based on the tax-free island of Guernsey, so using our services will save you a great deal on the long run.

Complete aircraft closure solutions

Contact us right now to get all the information you require.

I’ve had my Cirrus maintained by ASG for the past 4 years, since it was new and I’m always impressed with their detailed knowledge of the aircraft and it’s systems. ASG have really looked after me and my aircraft, which still looks as fresh as when it was built.

I always choose ASG for handling in Guernsey, because they are very friendly, it feels like I’m coming home! Nothing is too much trouble and on the odd occasion my aircraft has maintenance issues whilst I’m there, the engineers are very quick to sort things out and get me on my way. Bravo ASG!

ASG are very experienced on all Piper models, they maintained my previous aircraft before I traded up to my latest Mirage. I always get clear, detailed reports on what work needs doing along with cost estimates, before I commit to the work being done, which gives me peace of mind and enables me to budget ahead.

ASG are easily the most experienced Commander maintenance company outside the USA. No wonder there are so many Commanders in their hangars when I visit them for maintenance – I simply would not trust anyone else with my aircraft, having used them for the last 5 annual inspections.

I flew my Cirrus from Europe to ASG in Guernsey to have the CAPS replaced because they have a good reputation for fast, efficient service. I was not disappointed as they completed the work in 2 days at a fixed price that I was very happy with.


Please let us know how we can help you and we normally reply within 1 hour. You can also leave your telephone number and we would be happy to call you back. We are always interested to hear from fellow aviators.

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