Whistleblower urges Boeing to ground all 787 Dreamliners after safety warning

Engineer Sam Salehpour calls on planemaker ahead of testimony before Senate homeland security committee

A whistleblower has urged Boeing to ground every 787 Dreamliner jet worldwide after warning they are at risk of premature failure ahead of a high-profile hearing on Capitol Hill.

The planemaker has been grappling with its latest crisis since a cabin panel blowout in January raised fresh questions about the production of its bestselling commercial jet, the 737 Max.