The family of Thai billionaire Khun Vichai Srivaddhanaprabha is suing helicopter manufacturer Leonardo for $2.6 billion. The family alleges “multiple failures in Leonardo’s design process ...

Emergency services at the scene on the wreckage of a Leonardo AW169 that crashed in Leicester, England, in October 2018. Credit: Ben Stansall/AFP/Getty Images LONDON—Leonardo is the subject of a ...