800 

14 CFR Ch. I (1–1–14 Edition) 

§ 29.1195 

zones, other than tail surfaces not sub-
ject to heat, flames, or sparks ema-
nating from a designated fire zone or 
engine compartment, must be at least 
fire resistant. 

[Amdt. 29–3, 33 FR 970, Jan. 26, 1968] 

§ 29.1195

Fire extinguishing systems. 

(a) Each turbine engine powered 

rotorcraft and Category A recipro-
cating engine powered rotorcraft, and 
each Category B reciprocating engine 
powered rotorcraft with engines of 
more than 1,500 cubic inches must have 
a fire extinguishing system for the des-
ignated fire zones. The fire extin-
guishing system for a powerplant must 
be able to simultaneously protect all 
zones of the powerplant compartment 
for which protection is provided. 

(b) For multiengine powered rotor-

craft, the fire extinguishing system, 
the quantity of extinguishing agent, 
and the rate of discharge must— 

(1) For each auxiliary power unit and 

combustion equipment, provide at least 
one adequate discharge; and 

(2) For each other designated fire 

zone, provide two adequate discharges. 

(c) For single engine rotorcraft, the 

quantity of extinguishing agent and 
the rate of discharge must provide at 
least one adequate discharge for the 
engine compartment. 

(d) It must be shown by either actual 

or simulated flight tests that under 
critical airflow conditions in flight the 
discharge of the extinguishing agent in 
each designated fire zone will provide 
an agent concentration capable of ex-
tinguishing fires in that zone and of 
minimizing the probability of reigni-
tion. 

(Secs. 313(a), 601, 603, 604, Federal Aviation 
Act of 1958 (49 U.S.C. 1354(a), 1421, 1423, 1424), 
sec. 6(c), Dept. of Transportation Act (49 
U.S.C. 1655(c))) 

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as 
amended by Amdt. 29–3, 33 FR 970, Jan. 26, 
1968; Amdt. 29–13, 42 FR 15047, Mar. 17, 1977; 
Amdt. 29–17, 43 FR 50602, Oct. 30, 1978] 

§ 29.1197

Fire extinguishing agents. 

(a) Fire extinguishing agents must— 
(1) Be capable of extinguishing 

flames emanating from any burning of 
fluids or other combustible materials 

in the area protected by the fire extin-
guishing system; and 

(2) Have thermal stability over the 

temperature range likely to be experi-
enced in the compartment in which 
they are stored. 

(b) If any toxic extinguishing agent is 

used, it must be shown by test that 
entry of harmful concentrations of 
fluid or fluid vapors into any personnel 
compartment (due to leakage during 
normal operation of the rotorcraft, or 
discharge on the ground or in flight) is 
prevented, even though a defect may 
exist in the extinguishing system. 

(Secs. 313(a), 601, and 603, 72 Stat. 759, 775, 49 
U.S.C. 1354(a), 1421, and 1423; sec. 6(c), 49 
U.S.C. 1655(c)) 

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as 
amended by Amdt. 29–12, 41 FR 55473, Dec. 20, 
1976; Amdt. 29–13, 42 FR 15047, Mar. 17, 1977] 

§ 29.1199

Extinguishing agent con-

tainers. 

(a) Each extinguishing agent con-

tainer must have a pressure relief to 
prevent bursting of the container by 
excessive internal pressures. 

(b) The discharge end of each dis-

charge line from a pressure relief con-
nection must be located so that dis-
charge of the fire extinguishing agent 
would not damage the rotorcraft. The 
line must also be located or protected 
to prevent clogging caused by ice or 
other foreign matter. 

(c) There must be a means for each 

fire extinguishing agent container to 
indicate that the container has dis-
charged or that the charging pressure 
is below the established minimum nec-
essary for proper functioning. 

(d) The temperature of each con-

tainer must be maintained, under in-
tended operating conditions, to prevent 
the pressure in the container from— 

(1) Falling below that necessary to 

provide an adequate rate of discharge; 
or 

(2) Rising high enough to cause pre-

mature discharge. 

(Secs. 313(a), 601, and 603, 72 Stat. 759, 775, 49 
U.S.C. 1354(a), 1421, and 1423; sec. 6(c), 49 
U.S.C. 1655 (c)) 

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as 
amended by Amdt. 29–13, 42 FR 15047, Mar. 17, 
1977] 

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