Banbury-based Formula 1 team Marussia say their car was not at fault for a crash which left test driver Maria de Villotta seriously injured.
The 32-year-old hit a support truck at Duxford airfield earlier this month while testing, having two operations in hospital and losing her right eye.
Marussia team principal John Booth said: “We are satisfied the findings of our internal investigation exclude the car as a factor in the accident.”
The Spanish driver is reported to have made a “remarkable” recovery.
De Villota was was making her testing debut for Marussia.