Originally Posted by
Feathered
I have no clue what caused this accident at this time, but perhaps it was low cabin pressure / hypoxia. A second pilot may help in some situations or cross checks, but if there is not enough oxygen to keep one pilot conscious, how would a second pilot remain conscious unless there is a mandate that they are more physically fit / able to stay conscious with lower oxygen levels?
People react differenty to oxygen starvation. Whilst some become unsconscious very quickly others stay awake a few seconds longer, maybe just sufficiently long to get one's oxygen mask on or not. And we do not even know if this accident was caused by a pressurisation problem. It can have been any kind of medical incapacitation in which case a second pilot would certainly have saved the flight.