[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR173.172]

[Page 507]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--Table of Contents
 
Subpart E--Non-bulk Packaging for Hazardous Materials Other Than Class 1 
                               and Class 7
 
Sec. 173.172  Aircraft hydraulic power unit fuel tank.

    Aircraft hydraulic power unit fuel tanks containing a mixture of 
anhydrous hydrazine and monomethyl hydrazine (M86 fuel) and designed for 
installation as complete units in aircraft are excepted from the 
specification packaging requirements of this subchapter when they 
conform to either of the following conditions:
    (a) The unit must consist of an aluminum pressure vessel made from 
tubing and having welded heads. Primary containment of the fuel within 
this vessel must consist of a welded aluminum bladder having a maximum 
internal volume of 46 L (12 gallons). The outer vessel must have a 
minimum design gauge pressure of 1,275 kPa (185 psig) and a minimum 
burst gauge pressure of 2,755 kPa (400 psig). Each vessel must be leak-
checked during manufacture and before shipment and must be found 
leakproof. The complete inner unit must be securely packed in non-
combustible cushioning material, such as vermiculite, in a strong outer 
tightly closed metal packaging which will adequately protect all 
fittings. Maximum quantity of fuel per unit and package is 42 L (11 
gallons); or
    (b) The unit must consist of an aluminum pressure vessel. Primary 
containment of the fuel within this vessel must consist of a welded 
hermetically sealed fuel compartment with an elastomeric bladder having 
a maximum internal volume of 46 L (12 gallons). The pressure vessel must 
have a minimum design gauge pressure of 5,170 kPa (750 psig). Each 
vessel must be leak-checked during manufacture and before shipment and 
must be securely packed in non-combustible cushioning material, such as 
vermiculite, in a strong outer tightly closed metal packaging which will 
adequately protect all fittings. Maximum quantity of fuel per unit and 
package is 42 L (11 gallons).

[Amdt. 173-224, 55 FR 52643, Dec. 21, 1990, as amended by 66 FR 45380]