Boeing Crew Oxygen systems with two bottles
Our 787s have two crew O2 bottles and one pressure readout on the status page. I assume all Boeings have the same logic so are these two independent O2 systems (one for the LHS and one for the RHS) or are they joined as one. There is only one over pressure bursting disk (which suggests they are linked) but I have no access to schematics. This follows on from a training debate we were having asking was it possible to loose all crew oxygen at once or is their some safety protection if say the pipe from one bottle breaks.Also no one knew if you did loose all pressure would the status page show zero (/ nothing or dashed lines). What Would a transducer failure show?
Answers to any of these questions would be much appreciated. Thanks