[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR125.163]

[Page 994]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
 PART 125_CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 
 
              Subpart E_Special Airworthiness Requirements
 
Sec. 125.163  Fire-extinguishing agents.

    Only methyl bromide, carbon dioxide, or another agent that has been 
shown to provide equivalent extinguishing action may be used as a fire-
extinguishing agent. If methyl bromide or any other toxic extinguishing 
agent is used, provisions must be made to prevent harmful concentrations 
of fluid or fluid vapors from entering any personnel compartment either 
because of leakage during normal operation of the airplane or because of 
discharging the fire extinguisher on the ground or in flight when there 
is a defect in the extinguishing system. If a methyl bromide system is 
used, the containers must be charged with dry agent and sealed by the 
fire-extinguisher manufacturer or some other person using satisfactory 
recharging equipment. If carbon dioxide is used, it must not be possible 
to discharge enough gas into the personnel compartments to create a 
danger of suffocating the occupants.