Federal Aviation Administration, DOT

Section 121.349

by the certificate holder as its compliance with paragraph (c)(2) of this section are repeatable; and
(ii) The certificate holder maintains
documentation of the procedure required to reconstruct the original sensor signal value. This documentation is
also subject to the requirements of
Section 121.344(i).
(d) Compliance. Compliance is required as follows:
(1) No later than October 20, 2011,
each operator must determine, for each
airplane on its operations specifications, whether the airplane-s DFDR
system is filtering any of the parameters listed in paragraph (c) of this section. The operator must create a record
of this determination for each airplane
it operates, and maintain it as part of
the correlation documentation required by Section 121.344(j)(3) of this part.
(2) For airplanes that are not filtering 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 definition of filtering on any listed parameter.
(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, remove the filtering; or
(ii) No later than April 22, 2013, submit 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 approved 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
Section 121.344(j)(3) of this part.
[Doc. No. FAA-2006-26135, 75 FR 7356, Feb. 19,
2010]

Section 121.347 Communication and navigation equipment for operations
under VFR over routes navigated
by pilotage.
(a) No person may operate an airplane under VFR over routes that can
be navigated by pilotage unless the airplane is equipped with the radio communication 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 airspace, or within a Class E surface area
designated for an airport in which
flights are intended; and
(3) Receive meteorological information 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 airplane at night under VFR over routes
that can be navigated by pilotage unless that airplane is equipped with - 
(1) Radio communication equipment
necessary under normal operating conditions 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]

Section 121.349 Communication and navigation equipment for operations
under VFR over routes not navigated by pilotage or for operations
under IFR or over the top.
(a) Navigation equipment requirements - General. No person may conduct
operations under VFR over routes that
cannot be navigated by pilotage, or operations conducted under IFR or over
the top, unless - 
(1) The en route navigation aids necessary for navigating the airplane
along the route (e.g., ATS routes, arrival and departure routes, and instrument approach procedures, including
missed approach procedures if a missed

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