JAR 27.1457 Cockpit voice recorders
(a) Each cockpit voice recorder required by
[the applicable operating rules 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 flightcrew
members on the flight deck.
(3) Voice communications of flightcrew
members 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 flightcrew
members using the passenger
loudspeaker system, if there is such a system,
and if the fourth channel is available in
accordance with the requirements of subparagraph
(c) (4) (ii) of this paragraph.
(b) The recording requirements of subparagraph
(a) (2) of this paragraph 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
crew members on the flight deck when
directed to those stations; or
(2) By installing a continually
energised or voice-activated lip microphone
at the first and second pilot stations. The
microphone specified in this paragraph must
JAR 27.1415 (continued)
SECTION 1 JAR–27
Reissued by Change 1 1–F–11 6.9.93
be so located and if necessary, the
preamplifiers and filters of the recorder must
be adjusted or supplemented so 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
Authority. Repeated aural or visual playback
of the record may be used in evaluating
intelligibility.
(c) Each cockpit voice recorder must be
installed so that the part of the communication
or audio signals specified in sub-paragraph (a)
of this paragraph obtained from each of the
following sources is recorded on a separate
channel:
(1) For the first channel, from each
microphone, headset, or speaker used at the
first pilot station.
(2) For the second channel, from each
microphone, headset, or speaker used at the
second pilot station.
(3) For the third channel, from the
cockpit-mounted area microphone, or the
continually energised or voice-activated lip
microphone at the first and second pilot
stations.
(4) For the fourth channel, from –
(i) Each microphone, headset,
or speaker used at the stations for the
third and fourth crew members; or
(ii) If the stations specified in
sub-paragraph (c) (4) (i) of this
paragraph are not required or if the
signal at such a station is picked up by
another channel, each microphone on
the flight deck that is used with the
passenger loud-speaker system if its
signals are not picked up by another
channel.
(iii) Each microphone on the
flight deck that is used with the
rotorcraft’s loudspeaker system if its
signals are not picked up by another
channel.
(d) Each cockpit voice recorder must be
installed so that –
(1) It receives its electric power from
the bus that provides the maximum reliability
for operation of the cockpit voice recorder
without jeopardising service to essential or
emergency loads;
(2) There is an automatic means to
simultaneously stop the recorder and prevent
each erasure feature from functioning, within
10 minutes after crash impact; and
(3) There is an aural or visual means
for pre-flight checking of the recorder for
proper operation.
(e) The record container must be located
and mounted to minimise the probability of
rupture of the container as a result of crash
impact and consequent heat damage to the
record from fire.
(f) If the cockpit voice recorder has a bulk
erasure device, the installation must be designed
to minimise the probability of inadvertent
operation and actuation of the device during
crash impact.
(g) Each recorder container must be either
bright orange or bright yellow.
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