By Athena Jones
(CNN) — For more than a decade, Jane Wicker lived her life on the wing of an airplane.
On Saturday, in Dayton, Ohio, that’s the same way it tragically ended.
As planned, her plane turned upside down so she could sit on its wing.
Then, suddenly … disaster.
Wicker and her pilot, Charlie Swencker, were killed instantly.
The key question: what caused the plane to become so unbalanced during a standard part of her routine?
The NTSB is investigating – but says it’s way too early to know what went wrong.
No onlookers were injured.
The pictures above and video below show Wicker’s stunts at the 2012 Cleveland National Air Show.