130
14 CFR Ch. I (1–1–19 Edition)
§ 121.344
section, as appropriate, until the air-
plane has been operated for at least 25
hours of the operating time specified in
§ 121.359(a). A total of 1 hour of recorded
data may be erased for the purpose of
testing the flight recorder or the flight
recorder system. Any erasure made in
accordance with this paragraph must
be of the oldest recorded data accumu-
lated at the time of testing. Except as
provided in paragraph (i) of this sec-
tion, no record need be kept more than
60 days.
(i) In the event of an accident or oc-
currence that requires immediate noti-
fication of the National Transportation
Safety Board under part 830 of its regu-
lations and that results in termination
of the flight, the certificate holder
shall remove the recording media from
the airplane and keep the recorded
data required by paragraph (a), (b), (c),
or (d) of this section, as appropriate,
for at least 60 days or for a longer pe-
riod upon the request of the Board or
the Administrator.
(j) Each flight recorder required by
this section must be installed in ac-
cordance with the requirements of
§ 25.1459 of this chapter in effect on Au-
gust 31, 1977. The correlation required
by § 25.1459(c) of this chapter need be
established only on one airplane of any
group of airplanes—
(1) That are of the same type;
(2) On which the model flight re-
corder and its installation are the
same; and
(3) On which there is no difference in
the type design with respect to the in-
stallation of those first pilot’s instru-
ments associated with the flight re-
corder. The most recent instrument
calibration, including the recording
medium from which this calibration is
derived, and the recorder correlation
must be retained by the certificate
holder.
(k) Each flight recorder required by
this section that records the data spec-
ified in paragraph (a), (b), (c), or (d) of
this section, as appropriate, must have
an approved device to assist in locating
that recorder under water.
(l) No person may operate an airplane
specified in paragraph (b) of this sec-
tion that meets the Stage 2 noise levels
of part 36 of this chapter and is subject
to § 91.801(c) of this chapter unless it is
equipped with one or more approved
flight data recorders that utilize a dig-
ital method of recording and storing
data and a method of readily retrieving
that data from the storage medium.
The information specified in para-
graphs (c)(1) through (c)(11) of this sec-
tion must be able to be determined
within the ranges, accuracies and re-
cording intervals specified in appendix
B of this part. In addition—
(1) This flight data recorder must be
installed at the next heavy mainte-
nance check after May 26, 1994, but no
later than May 26, 1995. A heavy main-
tenance check is considered to be any
time an aircraft is scheduled to be out
of service for 4 or more days.
(2) By June 23, 1994, each carrier must
submit to the FAA Flight Standards
Service, Air Transportation Division
(AFS–200), documentation listing those
airplanes covered under this paragraph
and evidence that it has ordered a suf-
ficient number of flight data recorders
to meet the May 26, 1995, compliance
date for all aircraft on that list.
(3) After May 26, 1994, any aircraft
that is modified to meet Stage 3 noise
levels must have the flight data re-
corder described in paragraph (c) of
this section installed before operating
under this part.
(m) After August 20, 2001, this section
applies only to the airplane models
listed in § 121.344(l)(2). All other air-
planes must comply with the require-
ments of § 121.344, as applicable.
[Doc. No. 24418, 52 FR 9636, Mar. 25, 1987, as
amended by Amdt. 121–197, 53 FR 26147, July
11, 1988; Amdt. 121–238, 59 FR 26900, May 24,
1994; Amdt. 121–338, 73 FR 12565, Mar. 7, 2008]
§ 121.344
Digital flight data recorders
for transport category airplanes.
(a) Except as provided in paragraph
(l) of this section, no person may oper-
ate under this part a turbine-engine-
powered transport category airplane
unless it is equipped with one or more
approved flight recorders that use a
digital method of recording and storing
data and a method of readily retrieving
that data from the storage medium.
The operational parameters required to
be recorded by digital flight data re-
corders required by this section are as
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