843 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.630 

materials concerned by the FAA Prin-
cipal Operations Inspector assigned to 
the operator. 

§ 175.501

Special requirements for 

oxidizers and compressed oxygen. 

(a) Compressed oxygen, when prop-

erly labeled Oxidizer or Oxygen, may 
be loaded and transported as provided 
in this section. Except for Oxygen, 
compressed, no person may load or 
transport a hazardous material for 
which an OXIDIZER label is required 
under this subchapter in an inacces-
sible cargo compartment that does not 
have a fire or smoke detection system 
and a fire suppression system. 

(b) In addition to the quantity limi-

tations prescribed in § 175.75, no more 
than a combined total of six cylinders 
of compressed oxygen may be stowed 
on an aircraft in the inaccessible air-
craft cargo compartment(s) that do not 
have fire or smoke detection systems 
and fire suppression systems. 

(c) When loaded into a passenger-car-

rying aircraft or in an inaccessible 
cargo location on a cargo-only aircraft, 
cylinders of compressed oxygen must 
be stowed horizontally on the floor or 
as close as practicable to the floor of 
the cargo compartment or unit load de-
vice. This provision does not apply to 
cylinders stowed in the cabin of the 
aircraft in accordance with paragraph 
(e) of this section. 

(d) When transported in a Class B air-

craft cargo compartment (see 14 CFR 
25.857(b)) or its equivalent (i.e., an ac-
cessible cargo compartment equipped 
with a fire or smoke detection system, 
but not a fire suppression system), cyl-
inders of compressed oxygen must be 
loaded in a manner that a crew mem-
ber can see, handle and, when size and 
weight permit, separate the cylinders 
from other cargo during flight. No 
more than six cylinders of compressed 
oxygen and, in addition, one cylinder of 
medical-use compressed oxygen per 
passenger needing oxygen at destina-
tion—with a rated capacity of 1000 L 
(34 cubic feet) or less of oxygen—may 
be carried in a Class B aircraft cargo 
compartment or its equivalent. 

(e) A cylinder containing medical-use 

compressed oxygen, owned or leased by 
an aircraft operator or offered for 
transportation by a passenger needing 

it for personal medical use at destina-
tion, may be carried in the cabin of a 
passenger-carrying aircraft in accord-
ance with the following provisions: 

(1) No more than six cylinders be-

longing to the aircraft operator and, in 
addition, no more than one cylinder 
per passenger needing the oxygen at 
destination, may be transported in the 
cabin of the aircraft under the provi-
sions of this paragraph (e); 

(2) The rated capacity of each cyl-

inder may not exceed 1,000 L (34 cubic 
feet); 

(3) Each cylinder must conform to 

the provisions of this subchapter and 
be placed in: 

(i) An outer packaging that conforms 

to the performance criteria of Air 
Transport Association (ATA) Specifica-
tion 300 for a Category I Shipping Con-
tainer; or 

(ii) A metal, plastic or wood outer 

packaging that conforms to a UN 
standard at the Packing Group I or II 
performance level. 

(4) The aircraft operator shall se-

curely stow the cylinder in its over-
pack or outer packaging in the cabin of 
the aircraft and shall notify the pilot- 
in-command as specified in § 175.33 of 
this part; and 

(5) Shipments under this paragraph 

(e) are not subject to— 

(i) Sections 173.302(f) and 173.304(f) of 

this subchapter, subpart C of part 172 of 
this subchapter, and, for passengers 
only, subpart H of part 172 of this sub-
chapter; 

(ii) Section 173.25(a)(4) of this sub-

chapter; and 

(iii) Paragraph (b) of this section. 

[72 FR 4456, Jan. 31, 2007, as amended at 72 
FR 55099, Sept. 28, 2007] 

§ 175.630

Special requirements for Di-

vision 6.1 (poisonous) material and 
Division 6.2 (infectious substances) 
materials. 

(a) [Reserved] 
(b) No person may operate an aircraft 

that has been used to transport any 
package required to bear a POISON or 
POISON INHALATION HAZARD label 
unless, upon removal of such package, 
the area in the aircraft in which it was 
carried is visually inspected for evi-
dence of leakage, spillage, or other 

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