328 Support Services GmbH (328SSG) is a wholly owned subsidiary of the Sierra Nevada Corporation (SNC).

In 2019, 328SSG employed over 160 aviation experts, located at Airport Oberpfaffenhofen in Bavaria, some 30km South West from Munich, Germany. 328SSG supports currently more than 180 Dornier 328 aircraft Worldwide, certified in 85 countries providing TC and STC design activities through its EASA Part 21J Design Organization (Category 1A), its Part 21G Approved Production Organization (C1, C2 and D1 rating), its Maintenance organization through EASA/FAA Part 145 and a training Organisation EASA Part 147 as well as Part-M services (CAMO).

328 Support Services GmbH traces its route back to the dawn of aviation namely Dornier Flugzeugwerke, a German aircraft manufacturer founded in 1914. Over the course of its long lifespan Dornier Flugzeugwerke produced many notable designs for both the civil and military markets.

In January 2006, 328 Support Services GmbH (328SSG) was founded and became the Type Certificate (TC) holder for the Dornier 328 TurboProp and Jet aircraft. The company purchased the type certificate for the Dornier 328 aircraft, a 30 seater multirole aircraft, as well as for the Dornier 428 and other assets, in December 2005 from Avcraft, which previously had acquired it from Fairchild-Dornier.

The major product, the Do328 is a Regional aircraft that was manufactured in the 90s and early 2000s. The aircraft is certified in 85 countries around the world and currently operated in many countries by major airlines. The aircraft is used in both commercial and special mission markets and covers a great varieties of missions such as Air Ambulance, Search and Rescue operations, VIP and corporate shuttle or transport to name a few..

As the TC holder of the Dornier 328, 328SSG focused its core business on supporting the fleet of around 180 operational Do328 aircraft around the world. Customer & Technical support, including design engineering as well as training, are part of the daily business for the 328SSG team who ensure the aircraft is always ahead of its class.

Through its Part 21J Design Organisation, 328SSG is a EASA Level 1 Design Organization similar to any major OEMs such as Airbus, Boeing and Bombardier, and is able to support the industry in all issues on manufacturing, maintenance, continued airworthiness and other issues within the scope of their portfolio.

It is approved to work on any types of fixed wing aircraft & helicopter, from small piston aircraft up to Large jumbo jets with above 200 STC’s already certified on many different types of aircraft globally.

328SSG is also an approved EASA 21G Production Organization for production and selling new and spare parts as it is approved to produce parts not only for the Dornier aircraft but for all aircraft types. Furthermore, the company is an approved EASA Part 145 Maintenance Organization and offers aircraft maintenance, modification, overhaul, repairs, retrofit and refurbishment work on the Dornier 328 product.

Since 2015, 328SSG is under American ownership as it has been acquired by Sierra Nevada Corporation (SNC), a Tier one supplier within the Aerospace industry to the US government, headquarter in Centennial, Colorado.

In August 2019, 328SSG announced the formation of a new aircraft original equipment manufacturer, DRA GmbH, founded on the proud heritage of Dornier and Germany’s reputation for engineering design, quality and innovation.  DRA GmbH, together with 328SSG, will manage future developments of the D328NEU aircraft and exploit future technologies and capabilities to produce a more efficient, economic and environmentally friendly aircraft.

328SSG is based at Oberpfaffenhofen Airport, near Munich, Germany and currently employs nearly 200 aviation experts in design, modification, certification, material and supply chain.


See our Management System Certificates here

ISO 9001:2018

EN 9100:2018 based on ISO 9001:2015

328 Support Services GmbH is the Type Certificate Holder of the Dornier 328 Turboprop (D328-100) and Dornier 328 Jet (D328-300). Please find the EASA and FAA Type Certificate Data Sheets attached below:

EASA TCDS A.096               FAA   TCDS A45NM (Rev. 8)              FAA   TCDS A55NM (Rev. 7)

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