Section 23.2325

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

(c) The airplane must provide each
occupant with air at a breathable pressure, free of hazardous concentrations
of gases, vapors, and smoke during normal operations and likely failures.
(d) If a pressurization system is installed in the airplane, it must be designed to protect against - 
(1) Decompression to an unsafe level;
and
(2) Excessive differential pressure.
(e) If an oxygen system is installed in
the airplane, it must - 
(1) Effectively provide oxygen to each
user to prevent the effects of hypoxia;
and
(2) Be free from hazards in itself, in
its method of operation, and its effect
upon other components.
FIRE AND HIGH ENERGY PROTECTION

spaschal on DSK3GDR082PROD with CFR

Section 23.2325

Fire protection.

(a) The following materials must be
self-extinguishing - 
(1) Insulation on electrical wire and
electrical cable;
(2) For levels 1, 2, and 3 airplanes,
materials in the baggage and cargo
compartments inaccessible in flight;
and
(3) For level 4 airplanes, materials in
the cockpit, cabin, baggage, and cargo
compartments.
(b) The following materials must be
flame resistant - 
(1) For levels 1, 2 and 3 airplanes, materials in each compartment accessible
in flight; and
(2) Any equipment associated with
any electrical cable installation and
that would overheat in the event of circuit overload or fault.
(c) Thermal/acoustic materials in the
fuselage, if installed, must not be a
flame propagation hazard.
(d) Sources of heat within each baggage and cargo compartment that are
capable of igniting adjacent objects
must be shielded and insulated to prevent such ignition.
(e) For level 4 airplanes, each baggage and cargo compartment must - 
(1) Be located where a fire would be
visible to the pilots, or equipped with a
fire detection system and warning system; and
(2) Be accessible for the manual extinguishing of a fire, have a built-in

fire extinguishing system, or be constructed and sealed to contain any fire
within the compartment.
(f) There must be a means to extinguish any fire in the cabin such that - 
(1) The pilot, while seated, can easily
access the fire extinguishing means;
and
(2) For levels 3 and 4 airplanes, passengers have a fire extinguishing
means available within the passenger
compartment.
(g) Each area where flammable fluids
or vapors might escape by leakage of a
fluid system must - 
(1) Be defined; and
(2) Have a means to minimize the
probability of fluid and vapor ignition,
and the resultant hazard, if ignition occurs.
(h) Combustion heater installations
must be protected from uncontained
fire.
Section 23.2330 Fire protection in designated
fire zones and adjacent areas.
(a) Flight controls, engine mounts,
and other flight structures within or
adjacent to designated fire zones must
be capable of withstanding the effects
of a fire.
(b) Engines in a designated fire zone
must remain attached to the airplane
in the event of a fire.
(c) In designated fire zones, terminals, equipment, and electrical cables
used during emergency procedures
must be fire-resistant.
Section 23.2335

Lightning protection.

The airplane must be protected
against catastrophic effects from lightning.

Subpart E - Powerplant
Section 23.2400

Powerplant installation.

(a) For the purpose of this subpart,
the airplane powerplant installation
must include each component necessary for propulsion, which affects
propulsion safety, or provides auxiliary
power to the airplane.
(b) Each airplane engine and propeller must be type certificated, except
for engines and propellers installed on
level 1 low-speed airplanes, which may
be approved under the airplane type

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