Code of Federal Regulations - Title 14

494

14 CFR Ch. I (1–1–14 Edition)

§ 25.1203

(b) Each system component in an en-

gine compartment must be fireproof.

§ 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 sec-
tions 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, in-

ertia, 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 associ-
ated wiring within a designated fire
zone is severed at one point, unless the
system continues to function as a sat-
isfactory 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 cir-
cuit.

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 func-
tioning of each fire or overheat detec-
tor electric circuit.

(e) Components of each fire or over-

heat detector system in a fire zone
must be fire-resistant.

(f) No fire or overheat detector sys-

tem component for any fire zone may
pass through another fire zone, un-
less—

(1) It is protected against the possi-

bility of false warnings resulting from
fires in zones through which it passes;
or

(2) Each zone involved is simulta-

neously 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 re-
sponse time criteria specified in the ap-
propriate Technical Standard Order for
the detector.

(h) EWIS for each fire or overheat de-

tector system in a fire zone must meet
the requirements of § 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]

§ 25.1207

Compliance.

Unless otherwise specified, compli-

ance with the requirements of §§ 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 con-

figurations;

(b) Tests of components;
(c) Service experience of aircraft

with similar powerplant configura-
tions;

(d) Analysis.

[Amdt. 25–46, 43 FR 50598, Oct. 30, 1978]

Subpart F—Equipment

ENERAL

§ 25.1301

Function and installation.

(a) Each item of installed equipment

must—

(1) Be of a kind and design appro-

priate to its intended function;

(2) Be labeled as to its identification,

function, or operating limitations, or
any applicable combination of these
factors;

(3) Be installed according to limita-

tions specified for that equipment; and

(4) Function properly when installed.
(b) EWIS must meet the require-

ments of subpart H of this part.

[Doc.. No. 5066, Amdt. 1–6, 29 FR 18333, Dec.
24, 1964, as amended by Amdt. 25–123, 72 FR
63405, Nov. 8, 2007]

§ 25.1302

Installed systems and equip-

ment for use by the flightcrew.

This section applies to installed sys-

tems and equipment intended for
flightcrew members’ use in operating
the airplane from their normally seat-
ed positions on the flight deck. The ap-
plicant must show that these systems
and installed equipment, individually
and in combination with other such
systems and equipment, are designed
so that qualified flightcrew members
trained in their use can safely perform

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