Section 27.1459

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

(i) That provides 10 Section1 minutes of
electrical power to operate both the
cockpit voice recorder and cockpitmounted area microphone;
(ii) That is located as close as practicable to the cockpit voice recorder;
and
(iii) To which the cockpit voice recorder and cockpit-mounted area
microphone are switched automatically in the event that all other power
to the cockpit voice recorder is interrupted either by normal shutdown or
by any other loss of power to the electrical power bus.
(e) The record container must be located and mounted to minimize 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 minimize 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.
(h) When both a cockpit voice recorder and a flight data recorder are
required by the operating rules, one
combination unit may be installed,
provided that all other requirements of
this section and the requirements for
flight data recorders under this part
are met.

spaschal on DSK3GDR082PROD with CFR

[Amdt. 27-22, 53 FR 26144, July 11, 1988, as
amended by Amdt. 27-43, 73 FR 12563, Mar. 7,
2008; 74 FR 32800, July 9, 2009; Amdt. 27-45, 75
FR 17045, Apr. 5, 2010]

Section 27.1459 Flight data recorders.
(a) Each flight recorder required by
the operating rules of Subchapter G of
this chapter must be installed so that:
(1) It is supplied with airspeed, altitude, and directional data obtained
from sources that meet the accuracy
requirements of SectionSection 27.1323, 27.1325, and
27.1327 of this part, as applicable;
(2) The vertical acceleration sensor is
rigidly attached, and located longitudinally within the approved center of
gravity limits of the rotorcraft;
(3)(i) It receives its electrical power
from the bus that provides the maximum reliability for operation of the
flight data recorder without jeopard-

izing service to essential or emergency
loads.
(ii) It remains powered for as long as
possible without jeopardizing emergency operation of the rotorcraft.
(4) There is an aural or visual means
for preflight checking of the recorder
for proper recording of data in the storage medium;
(5) Except for recorders powered solely by the engine-driven electrical generator system, there is an automatic
means to simultaneously stop a recorder that has a data erasure feature
and prevent each erasure feature from
functioning, within 10 minutes after
any crash impact; and
(6) Whether the cockpit voice recorder and digital flight data recorder
are installed in separate boxes or in a
combination unit, no single electrical
failure external to the recorder may
disable both the cockpit voice recorder
and the digital flight data recorder.
(b) Each nonejectable recorder container must be located and mounted so
as to minimize the probability of container rupture resulting from crash impact and subsequent damage to the
record from fire.
(c) A correlation must be established
between the flight recorder readings of
airspeed, altitude, and heading and the
corresponding readings (taking into account correction factors) of the first pilot-s instruments. This correlation
must cover the airspeed range over
which the aircraft is to be operated,
the range of altitude to which the aircraft is limited, and 360 degrees of
heading. Correlation may be established on the ground as appropriate.
(d) Each recorder container must:
(1) Be either bright orange or bright
yellow;
(2) Have a reflective tape affixed to
its external surface to facilitate its location under water; and
(3) Have an underwater locating device, when required by the operating
rules of this chapter, on or adjacent to
the container which is secured in such
a manner that they are not likely to be
separated during crash impact.
(e) When both a cockpit voice recorder and a flight data recorder are
required by the operating rules, one
combination unit may be installed,
provided that all other requirements of

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