839 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 175.78 

b. Division 6.1 (unless the substance is also labeled for any hazard class or division except FLAMMABLE LIQUID) 
c. Class 7 (unless the hazardous material meets the definition of another hazard class). 
d. Class 9, Limited Quantity or Excepted Quantity material. 
e. Articles of Identification Numbers UN0012, UN0014, or UN0055 also meeting the requirements of § 173.63(b). 
f. Articles of Identification Numbers UN3528 or UN3529. 

Note 2: 

Aboard cargo-only aircraft, packages required to be loaded in a position that is considered to be accessible include 

those loaded in a Class C cargo compartment. 

[76 FR 82178, Dec. 30, 2011, as amended at 78 FR 65486, Oct. 31, 2013; 81 FR 35544, June 2, 2016; 
82 FR 15892, Mar. 30, 2017] 

§ 175.78

Stowage compatibility of 

cargo. 

(a) For stowage on an aircraft, in a 

cargo facility, or in any other area at 
an airport designated for the stowage 
of hazardous materials, packages con-
taining hazardous materials which 
might react dangerously with one an-
other may not be placed next to each 
other or in a position that would allow 

a dangerous interaction in the event of 
leakage. 

(b) At a minimum, the segregation 

instructions prescribed in the following 
Segregation Table must be followed to 
maintain acceptable segregation be-
tween packages containing hazardous 
materials with different hazards. The 
Segregation Table instructions apply 
whether or not the class or division is 
the primary or subsidiary risk. The 
Segregation Table follows: 

S

EGREGATION

T

ABLE

 

Hazard label 

Class or division 

1  2  3  4.2 4.3 5.1 5.2  8 

1 ............................................................................

Note 1 

Note 2 

Note 2 

Note 2 

Note 2 

Note 2 

Note 2 

Note 2 

2 ............................................................................

Note 2 

3 ............................................................................

Note 2 

X 

4.2 .........................................................................

Note 2 

X 

4.3 .........................................................................

Note 2 

X 

5.1 .........................................................................

Note 2 

X 

X 

5.2 .........................................................................

Note 2 

8 ............................................................................

Note 2 

X 

(c) Instructions for using the Seg-

regation Table are as follows: 

(1) Hazard labels, classes or divisions 

not shown in the table are not subject 
to segregation requirements. 

(2) Dots at the intersection of a row 

and column indicate that no restric-
tions apply. 

(3) The letter ‘‘X’’ at the intersection 

of a row and column indicates that 
packages containing these classes of 
hazardous materials may not be stowed 
next to or in contact with each other, 
or in a position which would allow 
interaction in the event of leakage of 
the contents. 

(4) Note 1. ‘‘Note 1’’ at the intersec-

tion of a row and column means the 
following: 

(i) Only Division 1.4, Compatibility 

Group S, explosives are permitted to be 
transported aboard a passenger air-
craft. Only certain Division 1.3, Com-
patibility Groups C and G, and Division 

1.4, Compatibility Groups B, C, D, E, G 
and S, explosives may be transported 
aboard a cargo aircraft. 

(ii) Division 1.4 explosives in Compat-

ibility Group S may be stowed with Di-
vision 1.3 and 1.4 explosives in compat-
ibility groups as permitted aboard air-
craft under paragraph (c)(4)(i) above. 

(iii) Except for Division 1.4B explo-

sives and as otherwise provided in this 
Note, explosives of different compat-
ibility groups may be stowed together 
whether or not they belong to the same 
division. Division 1.4B explosives must 
not be stowed together with any other 
explosive permitted aboard aircraft ex-
cept Division 1.4S, unless segregated as 
prescribed in paragraph (c)(4)(iv) of 
this section (‘‘Note 1’’). 

(iv) Division 1.4B and Division 1.3 ex-

plosives may not be stowed together. 
Division 1.4B explosives must be loaded 
into separate unit load devices and, 
when stowed aboard the aircraft, the 

VerDate Sep<11>2014 

16:41 Oct 31, 2018

Jkt 244226

PO 00000

Frm 00849

Fmt 8010

Sfmt 8010

Q:\49\49V2.TXT

PC31