On 1 October 2022, a Boeing 737-800 First Officer undergoing routine supervised training mishandled the touchdown at Nantes. The aircraft sustained substantial damage but there were no injuries. The potential consequences of an inexperienced trainee First Officer still undergoing line training after 63 hours on his first multi-crew type being allowed to attempt a landing on the non-standard longitudinal runway profile at Nantes with very little related coaching from the Training Captain were underestimated. The aircraft operator significantly enhanced its management of line training and a Safety Recommendation to improve operator awareness of Nantes’ non-standard runway profile was made.