140
14 CFR Ch. I (1–1–24 Edition)
§ 121.341
event the flight terminates in that
water.
[Doc. No. 6713, 31 FR 1147, Jan. 28, 1966, as
amended by Amdt. 121–25, 32 FR 3223, Feb. 24,
1967; Amdt. 121–251, 60 FR 65932, Dec. 20, 1995]
§ 121.341 Equipment for operations in
icing conditions.
(a) Except as permitted in paragraph
(c)(2) of this section, unless an airplane
is type certificated under the transport
category airworthiness requirements
relating to ice protection, or unless an
airplane is a non-transport category
airplane type certificated after Decem-
ber 31, 1964, that has the ice protection
provisions that meet section 34 of ap-
pendix A of part 135 of this chapter, no
person may operate an airplane in
icing conditions unless it is equipped
with means for the prevention or re-
moval of ice on windshields, wings, em-
pennage, propellers, and other parts of
the airplane where ice formation will
adversely affect the safety of the air-
plane.
(b) No person may operate an air-
plane in icing conditions at night un-
less means are provided for illu-
minating or otherwise determining the
formation of ice on the parts of the
wings that are critical from the stand-
point of ice accumulation. Any illu-
minating that is used must be of a type
that will not cause glare or reflection
that would handicap crewmembers in
the performance of their duties.
(c)
Non-transport category airplanes
type certificated after December 31, 1964.
Except for an airplane that has ice pro-
tection provisions that meet section 34
of appendix A of part 135 of this chap-
ter, or those for transport category air-
plane type certification, no person may
operate—
(1) Under IFR into known or forecast
light or moderate icing conditions;
(2) Under VFR into known light or
moderate icing conditions; unless the
airplane has functioning deicing anti-
icing equipment protecting each pro-
peller, windshield, wing, stabilizing or
control surface, and each airspeed, al-
timeter, rate of climb, or flight atti-
tude instrument system; or
(3) Into known or forecast severe
icing conditions.
(d) If current weather reports and
briefing information relied upon by the
pilot in command indicate that the
forecast icing condition that would
otherwise prohibit the flight will not
be encountered during the flight be-
cause of changed weather conditions
since the forecast, the restrictions in
paragraph (c) of this section based on
forecast conditions do not apply.
[Doc. No. 6258, 29 FR 18205, Dec. 31, 1964, as
amended by Amdt. 121–251, 60 FR 65929, Dec.
20, 1995]
§ 121.342 Pitot heat indication systems.
No person may operate a transport
category airplane or, after December
20, 1999, a nontransport category air-
plane type certificated after December
31, 1964, that is equipped with a flight
instrument pitot heating system unless
the airplane is also equipped with an
operable pitot heat indication system
that complies § 25.1326 of this chapter
in effect on April 12, 1978.
[Doc. No. 28154, 60 FR 65932, Dec. 20, 1995]
§ 121.343 Flight data recorders.
(a) Except as provided in paragraphs
(b), (c), (d), (e), and (f) of this section,
no person may operate a large airplane
that is certificated for operations
above 25,000 feet altitude or is turbine-
engine powered unless it is equipped
with one or more approved flight re-
corders that record data from which
the following may be determined with-
in the ranges, accuracies, and record-
ing intervals specified in appendix B of
this part:
(1) Time;
(2) Altitude;
(3) Airspeed;
(4) Vertical acceleration;
(5) Heading; and
(6) Time of each radio transmission
either to or from air traffic control.
(b) No person may operate a large
airplane type certificated up to and in-
cluding September 30, 1969, for oper-
ations above 25,000 feet altitude, or a
turbine-engine powered airplane cer-
tificated before the same date, unless
it is equipped before May 26, 1989 with
one or more approved flight recorders
that utilize a digital method of record-
ing and storing data and a method of
readily retrieving that data from the
storage medium. The following infor-
mation must be able to be determined