Section 25.1201

14 CFR Ch. I (1-1-19 Edition)

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 discharged or that the charging pressure
is below the established minimum necessary for proper functioning.
(d) The temperature of each container must be maintained, under intended 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 premature discharge.
(e) If a pyrotechnic capsule is used to
discharge the extinguishing agent,
each container must be installed so
that temperature conditions will not
cause hazardous deterioration of the
pyrotechnic capsule.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-23, 35 FR 5678, Apr. 8,
1970; Amdt. 25-40, 42 FR 15044, Mar. 17, 1977]

spaschal on DSK3GDR082PROD with CFR

Section 25.1201 Fire extinguishing system
materials.
(a) No material in any fire extinguishing system may react chemically
with any extinguishing agent so as to
create a hazard.
(b) Each system component in an engine compartment must be fireproof.
Section 25.1203 Fire detector system.
(a) There must be approved, quick
acting fire or overheat detectors in
each designated fire zone, and in the
combustion, turbine, and tailpipe sections of turbine engine installations, in
numbers
and
locations
ensuring
prompt detection of fire in those zones.
(b) Each fire detector system must be
constructed and installed so that - 
(1) It will withstand the vibration, inertia, and other loads to which it may
be subjected in operation;
(2) There is a means to warn the crew
in the event that the sensor or associated wiring within a designated fire
zone is severed at one point, unless the
system continues to function as a satisfactory detection system after the
severing; and
(3) There is a means to warn the crew
in the event of a short circuit in the

sensor or associated wiring within a
designated fire zone, unless the system
continues to function as a satisfactory
detection system after the short circuit.
(c) No fire or overheat detector may
be affected by any oil, water, other
fluids or fumes that might be present.
(d) There must be means to allow the
crew to check, in flight, the functioning of each fire or overheat detector electric circuit.
(e) Components of each fire or overheat detector system in a fire zone
must be fire-resistant.
(f) No fire or overheat detector system component for any fire zone may
pass through another fire zone, unless - 
(1) It is protected against the possibility of false warnings resulting from
fires in zones through which it passes;
or
(2) Each zone involved is simultaneously protected by the same detector
and extinguishing system.
(g) Each fire detector system must be
constructed so that when it is in the
configuration for installation it will
not exceed the alarm activation time
approved for the detectors using the response time criteria specified in the appropriate Technical Standard Order for
the detector.
(h) EWIS for each fire or overheat detector system in a fire zone must meet
the requirements of Section 25.1731.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-23, 35 FR 5678, Apr. 8,
1970; Amdt. 25-26, 36 FR 5493, Mar. 24, 1971;
Amdt. 25-123, 72 FR 63405, Nov. 8, 2007]

Section 25.1207

Compliance.

Unless otherwise specified, compliance with the requirements of SectionSection 25.1181
through 25.1203 must be shown by a full
scale fire test or by one or more of the
following methods:
(a) Tests of similar powerplant configurations;
(b) Tests of components;
(c) Service experience of aircraft
with similar powerplant configurations;
(d) Analysis.
[Amdt. 25-46, 43 FR 50598, Oct. 30, 1978]

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