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Thielert Woes Create Headaches for Diamond, Cessna

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Key Takeaways:

  • Diesel engine maker Thielert is in insolvency proceedings and under criminal investigation, causing severe uncertainty for its high-profile airplane programs.
  • Owners of Thielert-powered aircraft, particularly Diamond models, face grounded planes due to unavailable or exorbitantly expensive parts, invalid warranties, and significantly increased operating costs.
  • Diamond Aircraft, Thielert's main customer, is abandoning its partnership and developing a new engine with Austro Engines, leaving current Thielert engine owners to bear the costs of upgrades and losses from Thielert's bankruptcy.
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The legal and financial troubles of diesel engine maker Thielert have left high-profile airplane programs from Diamond and Cessna in a state of uncertainty.

Thielert Aircraft Engines is currently being overseen by a government administrator after the company filed for insolvency earlier this year amid a financial crisis and criminal investigation into the company’s record keeping. Company founder Frank Thielert and a chief financial officer were both fired by the board, and a criminal investigation of the company’s accounting practices is under way. While operating under interim government funding, Thielert is continuing to produce engines, albeit at a slower rate, and spare parts are hard to come by and exorbitantly expensive.

FLYING Staff

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