3 ms·

Don’t they need new engines at some point anyway?

• mschuster91 5y ago
  Yeah, but you would need a new type certificate if the model of the engine is different from the version that was certified. Not to mention, you'd need a lead-free-compatible engine that physically fits into the plane.
  • jandrese 5y ago
    I know some enthusiasts have been retrofitting with Subaru boxer engines with some success, but they end up with an X registration.
  • JorgeGT 5y ago
    True! But for many popular airframe/engine combinations there are companies which hold supplemental type certificates (STCs) for the conversion, see for instance Petersen Aviation who have a dedicated website for STCs covering conversion to auto fuel: https://www.autofuelstc.com/ https://www.autofuelstc.com/