FOUR decades on, the doomed Japan Airlines Flight 123 crash remains one of the world’s worst aviation disasters of all time.

Hir Prajapati, who lost his mother, Kalpana Ben Prajapati, in the AI-171 plane crash, has moved to the US Federal Court against Boeing, expecting speedy justice.

Hir Prajapati also expressed gratitude towards the Indian government, police and doctors for helping the family.