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870 

49 CFR Ch. I (10–1–23 Edition) 

§ 175.630 

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 
contamination. All contamination dis-
covered must be either isolated or re-
moved from the aircraft. 

(c) When unloaded from the aircraft, 

each package, overpack, pallet, or unit 
load device containing a Division 6.2 
material must be inspected for signs of 
leakage. If evidence of leakage is 
found, the cargo compartment in which 
the package, overpack, or unit load de-
vice was transported must be dis-
infected. Disinfection may be by any 
means that will make the material re-
leased ineffective at transmitting dis-
ease. 

[71 FR 14604, Mar. 22, 2006, as amended at 71 
FR 32263, June 2, 2006; 80 FR 1164, Jan. 8, 2015; 
85 FR 83402, Dec. 21, 2020] 

§ 175.700

Special limitations and re-

quirements for Class 7 materials. 

(a) Except as provided in §§ 173.4a, 

173.422 and 173.423 of this subchapter, 
no person may carry any Class 7 mate-
rials aboard a passenger-carrying air-
craft unless that material is intended 
for use in, or incident to research (See 
§ 171.8 of this subchapter), medical diag-
nosis or treatment. Regardless of its 
intended use, no person may carry a 
Type B(M) package aboard a passenger- 
carrying aircraft, a vented Type B(M) 
package aboard any aircraft, or a liq-
uid pyrophoric Class 7 material aboard 
any aircraft. 

(b) 

Limits for transport index and criti-

cality safety index. 

A person may carry 

the following Class 7 (radioactive) ma-
terials aboard an aircraft only when— 

(1) On a passenger-carrying aircraft— 
(i) Each single package on the air-

craft has a transport index no greater 
than 3.0; 

(ii) The combined transport index 

and the combined criticality index of 

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871 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.701 

all the packages on the aircraft are 
each no greater than 50. 

(2) On a cargo aircraft— 
(i) Each single package on the air-

craft has a transport index no greater 
than 10.0. 

(ii) The combined transport index of 

all the packages on the aircraft is no 
greater than 200, and the combined 
criticality index of all the packages on 
the aircraft is no greater than— 

(A) 50 on a non-exclusive use cargo 

aircraft, or 

(B) 100 on an aircraft assigned for the 

exclusive use of the shipper [offeror] 
for the specific shipment of fissile 
Class 7 material. Instructions for the 
exclusive use must be developed by the 
shipper [offeror] and carrier, and the 
instructions must accompany the ship-
ping papers. 

(3) The combined transport index and 

combined criticality index are deter-
mined by adding together the transport 
index and criticality index numbers, 
respectively, shown on the labels of the 
individual packages. 

(c) No person may carry in a pas-

senger-carrying aircraft any package 
required to be labeled RADIOACTIVE 
YELLOW–II or RADIOACTIVE YEL-
LOW–III label unless the package is 
carried on the floor of the cargo com-
partment or freight container. 

[71 FR 14604, Mar. 22, 2006, as amended at 74 
FR 2268, Jan. 14, 2009] 

§ 175.701

Separation distance require-

ments for packages containing 
Class 7 (radioactive) materials in 
passenger-carrying aircraft. 

(a) The following table prescribes the 

minimum separation distances that 
must be maintained in a passenger-car-
rying aircraft between Class 7 (radio-
active) materials labeled RADIO-
ACTIVE YELLOW–II or RADIOACTIVE 
YELLOW–III and passengers and crew: 

Transport index or sum of 

transport indexes of all pack-

ages in the aircraft or 

predesignated area 

Minimum separation 

distances 

Centimeters 

Inches 

0.1 to 1.0 ...............................

30 

12 

1.1 to 2.0 ...............................

50 

20 

2.1 to 3.0 ...............................

70 

28 

3.1 to 4.0 ...............................

85 

34 

4.1 to 5.0 ...............................

100 

40 

5.1 to 6.0 ...............................

115 

46 

6.1 to 7.0 ...............................

130 

52 

7.1 to 8.0 ...............................

145 

57 

8.1 to 9.0 ...............................

155 

61 

Transport index or sum of 

transport indexes of all pack-

ages in the aircraft or 

predesignated area 

Minimum separation 

distances 

Centimeters 

Inches 

9.1 to 10.0 .............................

165 

65 

10.1 to 11.0 ...........................

175 

69 

11.1 to 12.0 ...........................

185 

73 

12.1 to 13.0 ...........................

195 

77 

13.1 to 14.0 ...........................

205 

81 

14.1 to 15.0 ...........................

215 

85 

15.1 to 16.0 ...........................

225 

89 

16.1 to 17.0 ...........................

235 

93 

17.1 to 18.0 ...........................

245 

97 

18.1 to 20.0 ...........................

260 

102 

20.1 to 25.0 ...........................

290 

114 

25.1 to 30.0 ...........................

320 

126 

30.1 to 35.0 ...........................

350 

138 

35.1 to 40.0 ...........................

375 

148 

40.1 to 45.0 ...........................

400 

157 

45.1 to 50.0 ...........................

425 

167 

(b) When transported aboard pas-

senger-carrying aircraft packages, 
overpacks or freight containers labeled 
Radioactive Yellow–II or Radioactive 
Yellow–III must be separated from live 
animals by a distance of at least 0.5 m 
(20 inches) for journeys not exceeding 
24 hours, and by a distance of at least 
1.0 m (39 inches) for journeys longer 
than 24 hours. 

(c) Except as provided in paragraph 

(d) of this section, the minimum sepa-
ration distances prescribed in para-
graphs (a) and (b) of this section are de-
termined by measuring the shortest 
distance between the surfaces of the 
Class 7 (radioactive) materials package 
and the surfaces bounding the space oc-
cupied by passengers or animals. If 
more than one package of Class 7 (ra-
dioactive) materials is placed in a pas-
senger-carrying aircraft, the minimum 
separation distance for these packages 
shall be determined in accordance with 
paragraphs (a) and (b) of this section 
on the basis of the sum of the transport 
index numbers of the individual pack-
ages or overpacks. 

(d) 

Predesignated areas. 

A package la-

beled RADIOACTIVE YELLOW–II or 
RADIOACTIVE YELLOW–III may be 
carried in a passenger-carrying aircraft 
in accordance with a system of 
predesignated areas established by the 
aircraft operator. Each aircraft oper-
ator that elects to use a system of 
predesignated areas shall submit a de-
tailed description of the proposed sys-
tem to the Associate Administrator for 
approval prior to implementation of 
the system. A proposed system of 
predesignated areas is approved if the