869 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.501 

unloading procedures, as set forth in 
the operator’s operations manual, or 
for operators that are not certificate 
holders, as set forth in a written state-
ment. 

(

3

) Static ground wires must be con-

nected between the storage tank or fu-
eler and the aircraft, and between the 
aircraft and a positive ground device. 

(2) [Reserved] 
(d) The following restrictions apply 

to loading, handling, or carrying fuel 
under the provisions of this section: 

(1) During loading and unloading, no 

person may smoke, carry a lighted cig-
arette, cigar, or pipe, or operate any 
device capable of causing an open 
flame or spark within 15 m (50 feet) of 
the aircraft. 

(2) No person may fill a container, 

other than an approved bulk tank, with 
a Class 3 material or combustible liq-
uid or discharge a Class 3 material or 
combustible liquid from a container, 
other than an approved bulk tank, 
while that container is inside or within 
15 m (50 feet) of the aircraft. 

(3) When filling an approved bulk 

tank by hose from inside the aircraft, 
the doors and hatches of the aircraft 
must be fully open to insure proper 
ventilation. 

(4) Each area or compartment in 

which the fuel is loaded is suitably ven-
tilated to prevent the accumulation of 
fuel vapors. 

(5) Fuel is transferred to the aircraft 

fuel tanks only while the aircraft is on 
the ground. 

(6) Before each flight, the pilot-in- 

command: 

(i) Prohibits smoking, lighting 

matches, the carrying of any lighted 
cigar, pipe, cigarette or flame, and the 
use of anything that might cause an 
open flame or spark, while in flight; 
and 

(ii) For passenger aircraft, informs 

each passenger of the location of the 
fuel and the hazards involved. 

(e) Operators must comply with the 

following: 

(1) If the aircraft is being operated by 

a holder of a certificate issued under 14 
CFR part 121 or part 135, operations 
must be conducted in accordance with 
conditions and limitations specified in 
the certificate holder’s operations 
specifications or operations manual ac-

cepted by the FAA. If the aircraft is 
being operated under 14 CFR part 91, 
operations must be conducted in ac-
cordance with an operations plan ac-
cepted and acknowledged in writing by 
the FAA Principal Operations Inspec-
tor assigned to the operator. 

(2) The aircraft and the loading ar-

rangement to be used must be approved 
for the safe carriage of the particular 
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 

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