Originally Posted by
Meursault
In the last 50 years, on western civil aircraft, how many sudden cases of loss of cabin pressure and subsequent application of 10-20 sec of TUC? Now consider the number of flights where it did not happen. Then consider the total flight time of all flights globally and put it in relation to the total time of a long haul flight with an inexperienced SO alone in the seat.
I think Magenta is not far off, less than one in a billion would be my guess.
I've had two depressurisations - one, in a wide-body twin, occurred a few seconds after an engine failure at 37,000 feet whilst climbing to 41,000'. So, masks on shutting down an engine and turning to our ETOPS alternate ....... truly, a couple of years later, the scenario had been introduced as a SIM loft and many complained that it just not realistic and it was just wasting training time.
PS aircraft with the auto depress systems have malfunctioned royally in the recent past.