EASA 2020-0015

Calls for replacement of roll-over valves.  AD stems from the discovery of a manufacturing non-conformity, affecting a certain batch of roll-over valves P/N 510397-4. This may lead to fuel leakage from the valve in case of aircraft roll-over during an emergency or unusually hard landing. This condition, if not corrected, could lead to a post-impact fire, possibly resulting in injury to occupants.