Eyharts was born on 28 April 1957 in Biarritz, Basque Country, France.

He graduated as an engineer from the French Air Force Academy of Salon-de-Provence in 1979, and graduated from the École du personnel navigant d'essais et de réception (EPNER) French test pilot school in Istres in 1988.

[3] He participated in the installation and configuration of the Columbus European laboratory module.

[5] This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.

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