Lawmakers voice concerns over claims that Boeing threatens staff who raise safety concerns.

A Boeing engineer told US lawmakers that he was harassed and threatened after he raised concerns about the safety of the company’s planes.

Whistleblower Sam Salehpour said Wednesday that his boss berated him in a 40-minute call and his tyre was punctured by a nail.

He spoke at a hearing as part of a congressional investigation into safety at the manufacturing giant.