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Continuing Airworthiness Organisation

Airworthiness for Gliders

A Continuing Airworthiness  Organisation, CAO for short, is a company certified by the EASA to maintain the airworthiness of aircraft. The CAO carries out annual airworthiness checks and certifies these with a certificate of airworthiness and/or manages aircraft in what is known as a “controlled environment”. The latter option means that the CAO is responsible under aviation law for maintaining the airworthiness of the aircraft. In the case of M&D, this includes sailplanes and powered gliders.

Furthermore, our CAO allows you to enter into a limited contract to develop and approve the maintenance program (IHP) for your aircraft.

M&D CAO Services at a glance:

  • Annual airworthiness checks for your aircraft*
  • Maintaining the airworthiness of your aircraft (“controlled environment”)*
  • Development and approval of the maintenance program for your aircraft*
  • Registration of your aircraft* on the German register

* Sailplanes and powered gliders in accordance with an approved scope of work


M+D Flugzeugbau has been a household name for many pilots and clubs for decades. We are an EASA-certified manufacturer, a maintenance & development company and a CAO. We now have twenty years’ experience in maintaining wooden, composite, fibre-reinforced and metal sailplanes and powered gliders. In addition to general maintenance, we also perform large and small repairs, make custom modifications and have them certified through EASA, carry out full and partial paint jobs, and check your aircraft’s electronic equipment, including transponders.

Our CAO programme allows you to choose whether to have your aircraft inspected annually for airworthiness (Annual Inspection) or to have it checked only once every three years through our controlled environment programme. If you opt for the Annual Inspection, you, as the owner, are responsible for ensuring airworthiness. This includes, for example, complying with airworthiness directives, monitoring hours operated, implementing maintenance measures on schedule and maintaining the aircraft records. If you choose to have maintenance carried out under our controlled environment programme, our CAo team will take care of these issues. All you need to do is update us with your aircraft’s hours operated at regular intervals. In return, we’ll keep you abreast of what’s coming up next, whether it’s a 100-hour check of the engine, an AD, a centre of gravity check, or time to replace the seatbelts.

You’re probably thinking that all this will cost a fortune. Actually: no, it doesn’t. We’ve done our sums multiple times, and we’ve come up with the same answer each time. The controlled environment option, in which we take over maintaining the airworthiness of your or your club’s aircraft and you need only to present your aircraft for a physical airworthiness inspection every three years, is even cheaper than the Annual Inspection.


Keno Markwald
phone: +49 (0) 44 65 – 9 78 78 – 37

Mail: cao(at)

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