341
Federal Aviation Administration, DOT
§ 125.204
(b)
Navigation equipment for operations
over the top.
No person may operate an
airplane over the top unless it has
navigation equipment suitable for the
route to be flown.
(c)
Communication and navigation
equipment for IFR or extended over-water
operations—General.
Except as provided
in paragraph (f) of this section, no per-
son may operate an airplane carrying
passengers under IFR or in extended
over-water operations unless—
(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 the fol-
lowing equipment—
(i) Except as provided in paragraph
(d) of this section, two approved inde-
pendent navigation systems suitable
for navigating the airplane along the
route within the degree of accuracy re-
quired for ATC;
(ii) One marker beacon receiver pro-
viding visual and aural signals;
(iii) One ILS receiver;
(iv) Two transmitters;
(v) Two microphones;
(vi) Two headsets or one headset and
one speaker; and
(vii) Two independent communica-
tion systems, one of which must have
two-way voice communication capa-
bility, capable of transmitting to, and
receiving from, at least one appro-
priate facility from any place on the
route to be flown; 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.
(d)
Use of a single independent naviga-
tion system for operations under IFR—not
for extended overwater operations.
Not-
withstanding the requirements of para-
graph (c)(2)(i) of this section, the air-
plane may be equipped with a single
independent navigation system suit-
able for navigating the airplane along
the route to be flown within 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.
(e)
Use of VOR navigation equipment.
If VOR navigation equipment is re-
quired by paragraph (c) or (d) of this
section, no person may operate an air-
plane unless it is equipped with at least
one approved DME or a suitable RNAV
system.
(f)
Extended over-water operations.
Notwithstanding the requirements of
paragraph (c) of this section, installa-
tion and use of a single long-range
navigation system and a single long-
range communication system for ex-
tended over-water operations in certain
geographic areas may be authorized by
the Administrator and approved in the
certificate holder’s operations speci-
fications. The following are among the
operational factors the Administrator
may consider in granting an authoriza-
tion:
(1) The ability of the flight crew to
navigate the airplane along the route
to be flown within the degree of accu-
racy required for ATC;
(2) The length of the route being
flown; and
(3) The duration of the very high fre-
quency communications gap.
[Doc. No. FAA–2002–14002, 72 FR 31682, June 7,
2007]
§ 125.204 Portable electronic devices.
(a) Except as provided in paragraph
(b) of this section, no person may oper-
ate, nor may any operator or pilot in
command of an aircraft allow the oper-
ation of, any portable electronic device
on any U.S.-registered civil aircraft op-
erating under this part.
(b) Paragraph (a) of this section does
not apply to—
342
14 CFR Ch. I (1–1–24 Edition)
§ 125.205
(1) Portable voice recorders;
(2) Hearing aids;
(3) Heart pacemakers;
(4) Electric shavers;
(5) Portable oxygen concentrators
that comply with the requirements in
§ 125.219; or
(6) Any other portable electronic de-
vice that the Part 125 certificate holder
has determined will not cause inter-
ference with the navigation or commu-
nication system of the aircraft on
which it is to be used.
(c) The determination required by
paragraph (b)(6) of this section shall be
made by that Part 125 certificate hold-
er operating the particular device to be
used.
[Doc. No. FAA–1998–4954, 64 FR 1080, Jan. 7,
1999, as amended by Docket FAA–2014–0554,
Amdt. 125–65, 81 FR 33118, May 24, 2016]
§ 125.205 Equipment requirements:
Airplanes under IFR.
No person may operate an airplane
under IFR unless it has—
(a) A vertical speed indicator;
(b) A free-air temperature indicator;
(c) A heated pitot tube for each air-
speed indicator;
(d) A power failure warning device or
vacuum indicator to show the power
available for gyroscopic instruments
from each power source;
(e) An alternate source of static pres-
sure for the altimeter and the airspeed
and vertical speed indicators;
(f) At least two generators each of
which is on a separate engine, or which
any combination of one-half of the
total number are rated sufficiently to
supply the electrical loads of all re-
quired instruments and equipment nec-
essary for safe emergency operation of
the airplane; and
(g) Two independent sources of en-
ergy (with means of selecting either),
of which at least one is an engine-driv-
en pump or generator, each of which is
able to drive all gyroscopic instru-
ments and installed so that failure of
one instrument or source does not
interfere with the energy supply to the
remaining instruments or the other en-
ergy source. For the purposes of this
paragraph, each engine-driven source
of energy must be on a different en-
gine.
(h) For the purposes of paragraph (f)
of this section, a continuous inflight
electrical load includes one that draws
current continuously during flight,
such as radio equipment, electrically
driven instruments, and lights, but
does not include occasional intermit-
tent loads.
(i) An airspeed indicating system
with heated pitot tube or equivalent
means for preventing malfunctioning
due to icing.
(j) A sensitive altimeter.
(k) Instrument lights providing
enough light to make each required in-
strument, switch, or similar instru-
ment easily readable and installed so
that the direct rays are shielded from
the flight crewmembers’ eyes and that
no objectionable reflections are visible
to them. There must be a means of con-
trolling the intensity of illumination
unless it is shown that nondimming in-
strument lights are satisfactory.
§ 125.206 Pitot heat indication systems.
(a) Except as provided in paragraph
(b) of this section, after April 12, 1981,
no person may operate a transport cat-
egory airplane equipped with a flight
instrument pitot heating system unless
the airplane is equipped with an oper-
able pitot heat indication system that
complies with § 25.1326 of this chapter
in effect on April 12, 1978.
(b) A certificate holder may obtain
an extension of the April 12, 1981, com-
pliance date specified in paragraph (a)
of this section, but not beyond April 12,
1983, from the Executive Director,
Flight Standards Service if the certifi-
cate holder—
(1) Shows that due to circumstances
beyond its control it cannot comply by
the specified compliance date; and
(2) Submits by the specified compli-
ance date a schedule for compliance ac-
ceptable to the Executive Director, in-
dicating that compliance will be
achieved at the earliest practicable
date.
[Doc. No. 18904, 46 FR 43806, Aug. 31, 1981, as
amended by Amdt. 125–13, 54 FR 39294, Sept.
25, 1989; Docket FAA–2018–0119, Amdt. 125–68,
83 FR 9174, Mar. 5, 2018]