149
Federal Aviation Administration, DOT
§ 121.349
(2) Demonstrate by test and analysis
that the original sensor signal value
can be reconstructed from the recorded
data. This demonstration requires
that:
(i) The FAA determine that the pro-
cedure and the test results submitted
by the certificate holder as its compli-
ance with paragraph (c)(2) of this sec-
tion are repeatable; and
(ii) The certificate holder maintains
documentation of the procedure re-
quired to reconstruct the original sen-
sor signal value. This documentation is
also subject to the requirements of
§ 121.344(i).
(d)
Compliance.
Compliance is re-
quired as follows:
(1) No later than October 20, 2011,
each operator must determine, for each
airplane on its operations specifica-
tions, whether the airplane’s DFDR
system is filtering any of the param-
eters listed in paragraph (c) of this sec-
tion. The operator must create a record
of this determination for each airplane
it operates, and maintain it as part of
the correlation documentation re-
quired by § 121.344(j)(3) of this part.
(2) For airplanes that are not fil-
tering any listed parameter, no further
action is required unless the airplane’s
DFDR system is modified in a manner
that would cause it to meet the defini-
tion of filtering on any listed param-
eter.
(3) For airplanes found to be filtering
a parameter listed in paragraph (c) of
this section, the operator must either:
(i) No later than April 21, 2014, re-
move the filtering; or
(ii) No later than April 22, 2013, sub-
mit the necessary procedure and test
results required by paragraph (c)(2) of
this section.
(4) After April 21, 2014, no aircraft
flight data recording system may filter
any parameter listed in paragraph (c)
of this section that does not meet the
requirements of Appendix B or M of
this part, unless the certificate holder
possesses test and analysis procedures
and the test results that have been ap-
proved by the FAA. All records of
tests, analysis and procedures used to
comply with this section must be
maintained as part of the correlation
documentation required by
§ 121.344(j)(3) of this part.
[Doc. No. FAA–2006–26135, 75 FR 7356, Feb. 19,
2010]
§ 121.347 Communication and naviga-
tion equipment for operations
under VFR over routes navigated
by pilotage.
(a) No person may operate an air-
plane under VFR over routes that can
be navigated by pilotage unless the air-
plane is equipped with the radio com-
munication equipment necessary under
normal operating conditions to fulfill
the following:
(1) Communicate with at least one
appropriate station from any point on
the route;
(2) Communicate with appropriate air
traffic control facilities from any point
within Class B, Class C, or Class D air-
space, or within a Class E surface area
designated for an airport in which
flights are intended; and
(3) Receive meteorological informa-
tion from any point en route by either
of two independent systems. One of the
means provided to comply with this
subparagraph may be used to comply
with paragraphs (a)(1) and (2) of this
section.
(b) No person may operate an air-
plane at night under VFR over routes
that can be navigated by pilotage un-
less that airplane is equipped with—
(1) Radio communication equipment
necessary under normal operating con-
ditions to fulfill the functions specified
in paragraph (a) of this section; and
(2) Navigation equipment suitable for
the route to be flown.
[Doc. No. 6258, 29 FR 19205, Dec. 31, 1964, as
amended by Amdt. 121–226, 56 FR 65663, Dec.
17, 1991; Amdt. 121–333, 72 FR 31681, June 7,
2007]
§ 121.349 Communication and naviga-
tion equipment for operations
under VFR over routes not navi-
gated by pilotage or for operations
under IFR or over the top.
(a)
Navigation equipment require-
ments—General.
No person may conduct
operations under VFR over routes that
cannot be navigated by pilotage, or op-
erations conducted under IFR or over
the top, unless—
150
14 CFR Ch. I (1–1–24 Edition)
§ 121.351
(1) The en route navigation aids nec-
essary for navigating the airplane
along the route (e.g., ATS routes, ar-
rival and departure routes, and instru-
ment approach procedures, including
missed approach procedures if a missed
approach routing is specified in the
procedure) are available and suitable
for use by the aircraft navigation sys-
tems required by this section;
(2) The airplane used in those oper-
ations is equipped with at least—
(i) Except as provided in paragraph
(c) of this section, two approved inde-
pendent navigation systems suitable
for navigating the airplane along the
route to be flown within the degree of
accuracy required for ATC;
(ii) One marker beacon receiver pro-
viding visual and aural signals; and
(iii) One ILS receiver; and
(3) Any RNAV system used to meet
the navigation equipment require-
ments of this section is authorized in
the certificate holder’s operations
specifications.
(b)
Communication equipment require-
ments.
No person may operate an air-
plane under VFR over routes that can-
not be navigated by pilotage, and no
person may operate an airplane under
IFR or over the top, unless the airplane
is equipped with—
(1) At least two independent commu-
nication systems necessary under nor-
mal operating conditions to fulfill the
functions specified in § 121.347 (a); and
(2) At least one of the communica-
tion systems required by paragraph
(b)(1) of this section must have two-
way voice communication capability.
(c)
Use of a single independent naviga-
tion system for operations under VFR over
routes that cannot be navigated by pilot-
age, or operations conducted under IFR
or over the top.
Notwithstanding the re-
quirements of paragraph (a)(2)(i) of this
section, the airplane may be equipped
with a single independent navigation
system suitable for navigating the air-
plane along the route to be flown with-
in the degree of accuracy required for
ATC if:
(1) It can be shown that the airplane
is equipped with at least one other
independent navigation system suit-
able, in the event of loss of the naviga-
tion capability of the single inde-
pendent navigation system permitted
by this paragraph at any point along
the route, for proceeding safely to a
suitable airport and completing an in-
strument approach; and
(2) The airplane has sufficient fuel so
that the flight may proceed safely to a
suitable airport by use of the remain-
ing navigation system, and complete
an instrument approach and land.
(d)
Use of VOR navigation equipment.
If VOR navigation equipment is used to
comply with paragraph (a) or (c) of this
section, no person may operate an air-
plane unless it is equipped with at least
one approved DME or suitable RNAV
system.
(e)
Additional communication system
equipment requirements for operators sub-
ject to § 121.2.
In addition to the require-
ments in paragraph (b) of this section,
no person may operate an airplane hav-
ing a passenger seat configuration of 10
to 30 seats, excluding each crewmember
seat, and a maximum payload capacity
of 7,500 pounds or less, under IFR, over
the top, or in extended over-water op-
erations unless it is equipped with at
least—
(1) Two microphones; and
(2) Two headsets, or one headset and
one speaker.
[Doc. No. FAA–2002–14002, 72 FR 31681, June 7,
2007]
§ 121.351 Communication and naviga-
tion equipment for extended over-
water operations and for certain
other operations.
(a) Except as provided in paragraph
(c) of this section, no person may con-
duct an extended over-water operation
unless the airplane is equipped with at
least two independent long-range navi-
gation systems and at least two inde-
pendent long-range communication
systems necessary under normal oper-
ating conditions to fulfill the following
functions—
(1) Communicate with at least one
appropriate station from any point on
the route;
(2) Receive meteorological informa-
tion from any point on the route by ei-
ther of two independent communica-
tion systems. One of the communica-
tion systems used to comply with this
paragraph may be used to comply with
paragraphs (a)(1) and (a)(3) of this sec-
tion; and