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432 

14 CFR Ch. I (1–1–24 Edition) 

§ 135.91 

supply, located so as to allow imme-
diate placing of the mask on the pilot’s 
face sealed and secured for use. 

(3) Whenever a pressurized aircraft is 

operated at altitudes above 35,000 feet 
MSL, at least one pilot at the controls 
shall wear, secured and sealed, an oxy-
gen mask required by paragraph 
(b)(2)(i) of this section. 

(4) If one pilot leaves a pilot duty sta-

tion of an aircraft when operating at 
altitudes above 25,000 feet MSL, the re-
maining pilot at the controls shall put 
on and use an approved oxygen mask 
until the other pilot returns to the 
pilot duty station of the aircraft. 

§ 135.91 Oxygen and portable oxygen 

concentrators for medical use by 
passengers. 

(a) Except as provided in paragraphs 

(d) and (e) of this section, no certifi-
cate holder may allow the carriage or 
operation of equipment for the storage, 
generation or dispensing of medical ox-
ygen unless the conditions in para-
graphs (a) through (c) of this section 
are satisfied. Beginning August 22, 2016, 
a certificate holder may allow a pas-
senger to carry and operate a portable 
oxygen concentrator when the condi-
tions in paragraphs (b) and (f) of this 
section are satisfied. 

(1) The equipment must be— 
(i) Of an approved type or in con-

formity with the manufacturing, pack-
aging, marking, labeling, and mainte-
nance 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 certifi-
cate holder’s approved maintenance 
program; 

(iii) Free of flammable contaminants 

on all exterior surfaces; 

(iv) Constructed so that all valves, 

fittings, and gauges are protected from 
damage during carriage or operation; 
and 

(v) 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 173.115(b)— 

(i) When owned by the certificate 

holder, it must be maintained under its 
approved maintenance program; and 

(ii) The pressure in any oxygen cyl-

inder must not exceed the rated cyl-
inder pressure. 

(4) The pilot in command must be ad-

vised 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 ac-
cess to or use of any required emer-
gency or regular exit, or of the aisle in 
the passenger compartment. 

(b) No person may smoke or create 

an open flame and no certificate holder 
may allow any person to smoke or cre-
ate an open flame within 10 feet of oxy-
gen storage and dispensing equipment 
carried under paragraph (a) of this sec-
tion or a portable oxygen concentrator 
carried and operated under paragraph 
(f) of this section. 

(c) No certificate holder may allow 

any person other than a person trained 
in the use of medical oxygen equip-
ment to connect or disconnect oxygen 
bottles or any other ancillary compo-
nent 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 transpor-
tation (including any other properly 
equipped certificate holder) is reason-
ably available and the person carried 
under the medical emergency is accom-
panied 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, ex-
cluding Saturdays, Sundays, and Fed-
eral holidays, after the deviation, send 
to the responsible Flight Standards of-
fice a complete report of the operation 
involved, including a description of the 
deviation and the reasons for it. 

(f) 

Portable oxygen concentrators

—(1) 

Acceptance criteria. 

A passenger may 

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433 

Federal Aviation Administration, DOT 

§ 135.93 

carry or operate a portable oxygen con-
centrator for personal use on board an 
aircraft and a certificate holder may 
allow a passenger to carry or operate a 
portable oxygen concentrator on board 
an aircraft operated under this part 
during all phases of flight if the port-
able oxygen concentrator satisfies all 
of the requirements of this paragraph 
(f): 

(i) Is legally marketed in the United 

States in accordance with Food and 
Drug Administration requirements in 
title 21 of the CFR; 

(ii) Does not radiate radio frequency 

emissions that interfere with aircraft 
systems; 

(iii) Generates a maximum oxygen 

pressure of less than 200 kPa gauge 
(29.0 psig/43.8 psia) at 20 

°

C (68 

°

F); 

(iv) Does not contain any hazardous 

materials subject to the Hazardous Ma-
terials Regulations (49 CFR parts 171 
through 180) except as provided in 49 
CFR 175.10 for batteries used to power 
portable electronic devices and that do 
not require aircraft operator approval; 
and 

(v) Bears a label on the exterior of 

the device applied in a manner that en-
sures the label will remain affixed for 
the life of the device and containing 
the following certification statement 
in red lettering: ‘‘The manufacturer of 
this POC has determined this device 
conforms to all applicable FAA accept-
ance criteria for POC carriage and use 
on board aircraft.’’ The label require-
ments in this paragraph (f)(1)(v) do not 
apply to the following portable oxygen 
concentrators approved by the FAA for 
use on board aircraft prior to May 24, 
2016: 

(A) AirSep Focus; 
(B) AirSep FreeStyle; 
(C) AirSep FreeStyle 5; 
(D) AirSep LifeStyle; 
(E) Delphi RS–00400; 
(F) DeVilbiss Healthcare iGo; 
(G) Inogen One; 
(H) Inogen One G2; 
(I) Inogen One G3; 
(J) Inova Labs LifeChoice; 
(K) Inova Labs LifeChoice Activox; 
(L) International Biophysics 

LifeChoice; 

(M) Invacare Solo2; 
(N) Invacare XPO2; 

(O) Oxlife Independence Oxygen Con-

centrator; 

(P) Oxus RS–00400; 
(Q) Precision Medical EasyPulse; 
(R) Respironics EverGo; 
(S) Respironics SimplyGo; 
(T) SeQual Eclipse; 
(U) SeQual eQuinox Oxygen System 

(model 4000); 

(V) SeQual Oxywell Oxygen System 

(model 4000); 

(W) SeQual SAROS; and 
(X) VBox Trooper Oxygen Concen-

trator. 

(2) 

Operating requirements. 

Portable 

oxygen concentrators that satisfy the 
acceptance criteria identified in para-
graph (f)(1) of this section may be car-
ried on or operated by a passenger on 
board an aircraft provided the aircraft 
operator ensures that all of the condi-
tions in this paragraph (f)(2) are satis-
fied: 

(i) 

Exit seats. 

No person operating a 

portable oxygen concentrator is per-
mitted to occupy an exit seat. 

(ii) 

Stowage of device. 

During move-

ment on the surface, takeoff and land-
ing, the device must be stowed under 
the seat in front of the user, or in an-
other approved stowage location so 
that it does not block the aisle way or 
the entryway to the row. If the device 
is to be operated by the user, it must 
be operated only at a seat location that 
does not restrict any passenger’s access 
to, or use of, any required emergency 
or regular exit, or the aisle(s) in the 
passenger compartment. 

[Doc. No. 16097, 43 FR 46783, Oct. 10, 1978, as 
amended by Amdt. 135–60, 61 FR 2616, Jan. 26, 
1996; Docket FAA–2014–0554, Amdt. 135–133, 81 
FR 33119, May 24, 2016; Docket FAA–2018–0119, 
Amdt. 135–139, 83 FR 9175, Mar. 5, 2018] 

§ 135.93 Minimum altitudes for use of 

autopilot. 

(a) 

Definitions. 

For purpose of this 

section— 

(1) Altitudes for takeoff/initial climb 

and go-around/missed approach are de-
fined as above the airport elevation. 

(2) Altitudes for enroute operations 

are defined as above terrain elevation. 

(3) Altitudes for approach are defined 

as above the touchdown zone elevation 
(TDZE), unless the altitude is specifi-
cally in reference to DA (H) or MDA, in