AAIB investigation to Vans RV-9A, G-RPRV
Aircraft inverted following nose landing gear collapse after landing, Nympsfield Airfield, Gloucestershire, 23 August 2016.
Summary:
The aircraft landed on an undulating grass runway and had slowed down to an estimated groundspeed of 20 kt when the nose landing gear collapsed and the aircraft inverted. The pilot exited the aircraft through a hole he cut in the damaged canopy, using a fire axe.
Download report: