Expertise in the modification & repair of airplanes & helicopters

The Design Organisation (DO) of Assystem in Germany has a wide range of aviation right privileges. Several hundred projects were performed on various aircraft samples from manufacturers such as Airbus, ATR, Augusta, BAe, Bell, Boeing, Bombardier, Cessna, Embraer, Eurocopter and Learjet.


  • DOA: EASA 21J.657
  • Categories: CS 23, 25, 27, 29 (p)
  • Privileges:
    Development Part 21
    Supplemental Type Certificates STC
    Repair, classification major / minor
    Changes of and supplements to the aircraft manual

Products & solutions

  • Crew rest: Crew rest seat modifications for Class 3 Crew Rest. Read more here.
  • ELA: Electrical Load Analyses for individual aircraft or whole fleets
  • CLM: Cabin Layout Management

Would you like to make changes to your aircraft?

We will gladly provide you with an offer for engineering and approval.

Please contact our Design Organisation team in Hamburg. Ideally with the following information:

  • Aircraft manufacturer and type
  • Registration (tail sign)
  • Aircraft serial number
  • Pre-mod documents
  • Post-mod and specifications for the change

Joachim Lau

+49 40 743 65407

Hein-Sass-Weg 36

21129 Hamburg

Heiko Fimpel

+49 40 743 83110

Hein-Sass-Weg 36

21129 Hamburg

Thorsten Reimetz

+49 40 743 83115

Hein-Sass-Weg 36

21129 Hamburg

Assysten Germany - A new path to growth