Hi,
Well, the testy reactions are ofcourse uncalled for. Especially when the question is being asked diplomatically. (it's different when you're being
told to switch on the oxygen switch..
)
The answer to your first question is "Yes".
The answer to your second question is to my best knowledge unavailable.
Regarding the 2 types of airflow management. There is only 1 type of airflow management on the 777. That's the one with recirculation fans on.
The reason the packs have two modes of operation is to compensate in the event of a system failure in one of the components that prevents the normal use of system number 1
