Der Himmel gehört Euch

The wife of a mechanic and former fighter pilot falls in love with the idea of flying herself. This soon becomes an obsession and she undertakes a lofty feat: the longest solo flight ever made by a woman.

What I find strange about this film is how it starts by saying it is about real people. Yet, I am unable to determine which real people it concerns. As an American, when I hear longest solo flight, I think Amelia Earhart. Because I have this bias, am I not aware of a similar French aviator? (Or aviatrix?) The film is a good one, but that one detail nags at me because I would love to compare the film to a real-life counterpart, and as far as I can tell, it does not exist. A shame.