320
14 CFR Ch. I (1–1–14 Edition)
§ 23.1459
cockpit voice recorder without jeopard-
izing service to essential or emergency
loads.
(ii) It remains powered for as long as
possible without jeopardizing emer-
gency operation of the airplane.
(2) There is an automatic means to
simultaneously stop the recorder and
prevent each erasure feature from func-
tioning, within 10 minutes after crash
impact; and
(3) There is an aural or visual means
for preflight checking of the recorder
for proper operation;
(4) Any single electrical failure exter-
nal to the recorder does not disable
both the cockpit voice recorder and the
flight data recorder;
(5) It has an independent power
source—
(i) That provides 10
±
1 minutes of
electrical power to operate both the
cockpit voice recorder and cockpit-
mounted area microphone;
(ii) That is located as close as prac-
ticable to the cockpit voice recorder;
and
(iii) To which the cockpit voice re-
corder and cockpit-mounted area
microphone are switched automati-
cally in the event that all other power
to the cockpit voice recorder is inter-
rupted either by normal shutdown or
by any other loss of power to the elec-
trical power bus; and
(6) It is in a separate container from
the flight data recorder when both are
required. If used to comply with only
the cockpit voice recorder require-
ments, a combination unit may be in-
stalled.
(e) The recorder container must be
located and mounted to minimize the
probability of rupture of the container
as a result of crash impact and con-
sequent heat damage to the recorder
from fire.
(1) Except as provided in paragraph
(e)(2) of this section, the recorder con-
tainer must be located as far aft as
practicable, but need not be outside of
the pressurized compartment, and may
not be located where aft-mounted en-
gines may crush the container during
impact.
(2) If two separate combination dig-
ital flight data recorder and cockpit
voice recorder units are installed in-
stead of one cockpit voice recorder and
one digital flight data recorder, the
combination unit that is installed to
comply with the cockpit voice recorder
requirements may be located near the
cockpit.
(f) If the cockpit voice recorder has a
bulk erasure device, the installation
must be designed to minimize the prob-
ability of inadvertent operation and ac-
tuation of the device during crash im-
pact.
(g) Each recorder container must:
(1) Be either bright orange or bright
yellow;
(2) Have reflective tape affixed to its
external surface to facilitate its loca-
tion under water; and
(3) Have an underwater locating de-
vice, when required by the operating
rules of this chapter, on or adjacent to
the container which is secured in such
manner that they are not likely to be
separated during crash impact.
[Amdt. 23–35, 53 FR 26142, July 11, 1988, as
amended by Amdt. 23–58, 73 FR 12562, Mar. 7,
2008; 74 FR 32799, July 9, 2009]
§ 23.1459
Flight data recorders.
(a) Each flight recorder required by
the operating rules of this chapter
must be installed so that:
(1) It is supplied with airspeed, alti-
tude, and directional data obtained
from sources that meet the accuracy
requirements of §§ 23.1323, 23.1325, and
23.1327, as appropriate;
(2) The vertical acceleration sensor is
rigidly attached, and located longitu-
dinally either within the approved cen-
ter of gravity limits of the airplane, or
at a distance forward or aft of these
limits that does not exceed 25 percent
of the airplane’s mean aerodynamic
chord;
(3)(i) It receives its electrical power
from the bus that provides the max-
imum 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 emer-
gency operation of the airplane.
(4) There is an aural or visual means
for preflight checking of the recorder
for proper recording of data in the stor-
age medium;
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