Boeing has been forced to correct a flaw in the software of flight training simulators that are meant to reproduce the flying conditions of the 737 Max aircraft involved in two deadly crashes in the past six months.

The disclosure of a problem with the simulator software is a further blow to the credibility of the Boeing brand, which has been seriously damaged in recent months by the two crashes, in which 346 people died. Subsequent disclosures of serious design flaws both in the anti-stall system of the Max, the manoeuvring characteristics augmentation system (MCAS), as well as errors involving