135.91 Oxygen for medical use by passengers.
(a) Except as provided in paragraphs (d) and (e) of this section, no
certificate holder may allow the carriage or operation of equipment for the
storage, generation or dispensing of medical oxygen unless the unit to be
carried is constructed so that all valves, fittings, and gauges are
protected from damage during that carriage or operation and unless the
following conditions are met—
(1) The equipment must be—
(i) Of an approved type or in conformity with the manufacturing,
packaging, marking, labeling, and maintenance requirements of title 49 CFR
parts 171, 172, and 173, except §173.24(a)(1);
(ii) When owned by the certificate holder, maintained under the
certificate holder's approved maintenance program;
(iii) Free of flammable contaminants on all exterior surfaces; and
(iv) Appropriately secured.
(2) When the oxygen is stored in the form of a liquid, the equipment must
have been under the certificate holder's approved maintenance program since
its purchase new or since the storage container was last purged.
(3) When the oxygen is stored in the form of a compressed gas as defined
in title 49 CFR 173.300(a)—
(i) When owned by the certificate holder, it must be maintained under its
approved maintenance program; and
(ii) The pressure in any oxygen cylinder must not exceed the rated
(4) The pilot in command must be advised when the equipment is on board,
and when it is intended to be used.
(5) The equipment must be stowed, and each person using the equipment
must be seated, so as not to restrict access to or use of any required
emergency or regular exit, or of the aisle in the passenger compartment.
(b) No person may smoke and no certificate holder may allow any person to
smoke within 10 feet of oxygen storage and dispensing equipment carried
under paragraph (a) of this section.
(c) No certificate holder may allow any person other than a person
trained in the use of medical oxygen equipment to connect or disconnect
oxygen bottles or any other ancillary component while any passenger is
aboard the aircraft.
(d) Paragraph (a)(1)(i) of this section does not apply when that
equipment is furnished by a professional or medical emergency service for
use on board an aircraft in a medical emergency when no other practical
means of transportation (including any other properly equipped certificate
holder) is reasonably available and the person carried under the medical
emergency is accompanied by a person trained in the use of medical oxygen.
(e) Each certificate holder who, under the authority of paragraph (d) of
this section, deviates from paragraph (a)(1)(i) of this section under a
medical emergency shall, within 10 days, excluding Saturdays, Sundays, and
Federal holidays, after the deviation, send to the certificate-holding
district office a complete report of the operation involved, including a
description of the deviation and the reasons for it.