Section 29.1439

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

system, and to prevent excessive pressures resulting from any fluid volumetric change in lines likely to remain
closed long enough for such a change to
take place. The possibility of detrimental transient (surge) pressures during operation must be considered.
(5) Each hydraulic line, fitting, and
component must be installed and supported to prevent excessive vibration
and to withstand inertia loads. Each
element of the installation must be
protected from abrasion, corrosion, and
mechanical damage.
(6) Means for providing flexibility
must be used to connect points, in a
hydraulic fluid line, between which relative motion or differential vibration
exists.
(b) Tests. Each element of the system
must be tested to a proof pressure of 1.5
times the maximum pressure to which
that element will be subjected in normal operation, without failure, malfunction, or detrimental deformation
of any part of the system.
(c) Fire protection. Each hydraulic
system using flammable hydraulic
fluid must meet the applicable requirements of SectionSection 29.861, 29.1183, 29.1185, and
29.1189.

spaschal on DSK3GDR082PROD with CFR

Section 29.1439 Protective breathing equipment.
(a) If one or more cargo or baggage
compartments are to be accessible in
flight, protective breathing equipment
must be available for an appropriate
crewmember.
(b) For protective breathing equipment required by paragraph (a) of this
section or by any operating rule of this
chapter - 
(1) That equipment must be designed
to protect the crew from smoke, carbon
dioxide, and other harmful gases while
on flight deck duty;
(2) That equipment must include - 
(i) Masks covering the eyes, nose, and
mouth; or
(ii) Masks covering the nose and
mouth, plus accessory equipment to
protect the eyes; and
(3) That equipment must supply protective oxygen of 10 minutes duration
per crewmember at a pressure altitude
of 8,000 feet with a respiratory minute
volume of 30 liters per minute BTPD.

Section 29.1457

Cockpit voice recorders.

(a) Each cockpit voice recorder required by the operating rules of this
chapter must be approved, and must be
installed so that it will record the following:
(1) Voice communications transmitted from or received in the rotorcraft by radio.
(2) Voice communications of flight
crewmembers on the flight deck.
(3) Voice communications of flight
crewmembers on the flight deck, using
the rotorcraft-s interphone system.
(4) Voice or audio signals identifying
navigation or approach aids introduced
into a headset or speaker.
(5) Voice communications of flight
crewmembers using the passenger loudspeaker system, if there is such a system, and if the fourth channel is available in accordance with the requirements of paragraph (c)(4)(ii) of this section.
(6) If datalink communication equipment is installed, all datalink communications, using an approved data message set. Datalink messages must be
recorded as the output signal from the
communications unit that translates
the signal into usable data.
(b) The recording requirements of
paragraph (a)(2) of this section may be
met - 
(1) By installing a cockpit-mounted
area microphone, located in the best
position for recording voice communications originating at the first and
second pilot stations and voice communications of other crewmembers on the
flight deck when directed to those stations; or
(2) By installing a continually energized or voice-actuated lip microphone
at the first and second pilot stations.
The microphone specified in this paragraph must be so located and, if necessary, the preamplifiers and filters of
the recorder must be so adjusted or
supplemented, that the recorded communications are intelligible when recorded under flight cockpit noise conditions and played back. The level of
intelligibility must be approved by the
Administrator. Repeated aural or visual playback of the record may be used
in evaluating intelligibility.

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