Sec. 25.1445 - Equipment standards for the oxygen
distributing system.
(a) When oxygen is supplied to both crew
and passengers, the distribution system must be designed for either --
(1) A source of supply for the flight
crew on duty and a separate source for the passengers and other
crewmembers; or
(2) A common source of supply with means
to separately reserve the minimum supply required by the flight crew on
duty.
(b) Portable walk-around oxygen units of
the continuous flow, diluter-demand, and straight demand kinds may be used
to meet the crew or passenger breathing requirements.