Kelly Ortberg reports $6bn quarterly loss at beleaguered planemaker amid worker strike that has entered fifth week

The new boss of Boeing has pledged to “fundamentally” transform the culture inside the beleaguered aerospace giant, as its quarterly losses swelled to almost $6bn amid a sweeping strike.

As thousands of workers vote on a new contract on Wednesday, raising the prospect of an end to the crippling industrial action which began almost six weeks ago, Boeing revealed the extent of the damage of a dire year on its business.