Section 25.865

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

(3) Possible ignition sources, including electrical faults, overheating of
equipment, and malfunctioning of protective devices.
(4) Means available for controlling or
extinguishing a fire, such as stopping
flow of fluids, shutting down equipment, fireproof containment, or use of
extinguishing agents.
(5) Ability of airplane components
that are critical to safety of flight to
withstand fire and heat.
(c) If action by the flight crew is required to prevent or counteract a fluid
fire (e.g., equipment shutdown or actuation of a fire extinguisher) quick acting means must be provided to alert
the crew.
(d) Each area where flammable fluids
or vapors might escape by leakage of a
fluid system must be identified and defined.
[Amdt. 25-23, 35 FR 5676, Apr. 8, 1970, as
amended by Amdt. 25-46, 43 FR 50597, Oct. 30,
1978]

Section 25.865 Fire protection of flight controls, engine mounts, and other
flight structure.
Essential flight controls, engine
mounts, and other flight structures located in designated fire zones or in adjacent areas which would be subjected
to the effects of fire in the fire zone
must be constructed of fireproof material or shielded so that they are capable of withstanding the effects of fire.
[Amdt. 25-23, 35 FR 5676, Apr. 8, 1970]

(a) Surfaces to the rear of the nacelles, within one nacelle diameter of
the nacelle centerline, must be at least
fire-resistant.
(b) Paragraph (a) of this section does
not apply to tail surfaces to the rear of
the nacelles that could not be readily
affected by heat, flames, or sparks
coming from a designated fire zone or
engine compartment of any nacelle.
[Amdt. 25-23, 35 FR 5676, Apr. 8, 1970]
spaschal on DSK3GDR082PROD with CFR

[Amdt. 25-72, 55 FR 29784, July 20, 1990, as
amended by Amdt. 25-113, 69 FR 12530, Mar.
16, 2004; Amdt. 25-123, 72 FR 63405, Nov. 8,
2007]

MISCELLANEOUS
Section 25.871

Section 25.867 Fire protection: other components.

Section 25.869

smoke protection requirements of
SectionSection 25.831(c) and 25.863.
(2) Equipment that is located in designated fire zones and is used during
emergency procedures must be at least
fire resistant.
(3) EWIS components must meet the
requirements of Section 25.1713.
(b) Each vacuum air system line and
fitting on the discharge side of the
pump that might contain flammable
vapors or fluids must meet the requirements of Section 25.1183 if the line or fitting is
in a designated fire zone. Other vacuum
air systems components in designated
fire zones must be at least fire resistant.
(c) Oxygen equipment and lines
must - 
(1) Not be located in any designated
fire zone,
(2) Be protected from heat that may
be generated in, or escape from, any
designated fire zone, and
(3) Be installed so that escaping oxygen cannot cause ignition of grease,
fluid, or vapor accumulations that are
present in normal operation or as a result of failure or malfunction of any
system.

Fire protection: systems.

(a) Electrical system components:
(1) Components of the electrical system must meet the applicable fire and

Leveling means.

There must be means for determining
when the airplane is in a level position
on the ground.
[Amdt. 25-23, 35 FR 5676, Apr. 8, 1970]

Section 25.875 Reinforcement
lers.

near

(a) Each part of the airplane near the
propeller tips must be strong and stiff
enough to withstand the effects of the
induced vibration and of ice thrown
from the propeller.
(b) No window may be near the propeller tips unless it can withstand the
most severe ice impact likely to occur.

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