Section 25.1445

14 CFR Ch. I (1-1-19 Edition)

oxygen is the same as specified in paragraph (a) or (b) of this section, whichever is applicable.

spaschal on DSK3GDR082PROD with CFR

Section 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, diluterdemand, and straight demand kinds
may be used to meet the crew or passenger breathing requirements.
Section 25.1447 Equipment standards for oxygen dispensing units.
If oxygen dispensing units are installed, the following apply:
(a) There must be an individual dispensing unit for each occupant for
whom supplemental oxygen is to be
supplied. Units must be designed to
cover the nose and mouth and must be
equipped with a suitable means to retain the unit in position on the face.
Flight crew masks for supplemental
oxygen must have provisions for the
use of communication equipment.
(b) If certification for operation up to
and including 25,000 feet is requested,
an oxygen supply terminal and unit of
oxygen dispensing equipment for the
immediate use of oxygen by each crewmember must be within easy reach of
that crewmember. For any other occupants, the supply terminals and dispensing equipment must be located to
allow the use of oxygen as required by
the operating rules in this chapter.
(c) If certification for operation
above 25,000 feet is requested, there
must be oxygen dispensing equipment
meeting the following requirements:
(1) There must be an oxygen dispensing unit connected to oxygen supply terminals immediately available to
each occupant, wherever seated, and at
least two oxygen dispensing units connected to oxygen terminals in each lavatory. The total number of dispensing

units and outlets in the cabin must exceed the number of seats by at least 10
percent. The extra units must be as
uniformly distributed throughout the
cabin as practicable. If certification for
operation above 30,000 feet is requested,
the dispensing units providing the required oxygen flow must be automatically presented to the occupants before
the cabin pressure altitude exceeds
15,000 feet. The crew must be provided
with a manual means of making the
dispensing units immediately available
in the event of failure of the automatic
system.
(2) Each flight crewmember on flight
deck duty must be provided with a
quick-donning type oxygen dispensing
unit connected to an oxygen supply
terminal. This dispensing unit must be
immediately available to the flight
crewmember when seated at his station, and installed so that it:
(i) Can be placed on the face from its
ready
position,
properly
secured,
sealed, and supplying oxygen upon demand, with one hand, within five seconds and without disturbing eyeglasses
or causing delay in proceeding with
emergency duties; and
(ii) Allows, while in place, the performance of normal communication
functions.
(3) The oxygen dispensing equipment
for the flight crewmembers must be:
(i) The diluter demand or pressure demand (pressure demand mask with a
diluter demand pressure breathing regulator) type, or other approved oxygen
equipment shown to provide the same
degree of protection, for airplanes to be
operated above 25,000 feet.
(ii) The pressure demand (pressure
demand mask with a diluter demand
pressure breathing regulator) type with
mask-mounted regulator, or other approved oxygen equipment shown to
provide the same degree of protection,
for airplanes operated at altitudes
where decompressions that are not extremely improbable may expose the
flightcrew to cabin pressure altitudes
in excess of 34,000 feet.
(4) Portable oxygen equipment must
be immediately available for each
cabin attendant. The portable oxygen

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