About time this issue is addressed by the regulators. Hopefully they will actually do something substantial about it and we will see significant reductions in maximum working hours for pilots (and cabin crew).

Why is it that regulators seem to wait until people die before addressing problems that were very clearly apparent before any accidents happened? The problem with bleed air contamination is an example of an issue that has so far not caused an accident, but has come very close a number of times, and so far regulators are turning a blind eye and just giving it lip service.

Why don’t aviation authorities have any balls?