Federal Aviation Administration, DOT

Section 121.359

and that part of Canada west of longitude 130 degrees W, between latitude
70 degrees N, and latitude 53 degrees N,
or during any training, test, or ferry
flight.
(e) Notwithstanding any other provision of this chapter, an alternate electrical power supply is not required for
airborne weather radar equipment.
[Doc. No. 6258, 29 FR 19205, Dec. 31, 1964, as
amended by Amdt. 121-18, 31 FR 5825, Apr. 15,
1966; Amdt. 121-130, 41 FR 47229, Oct. 28, 1976;
Amdt. 121-251, 60 FR 65932, Dec. 20, 1995]

Section 121.358 Low-altitude windshear system equipment requirements.
(a) Airplanes manufactured after January 2, 1991. No person may operate a
turbine-powered
airplane
manufactured after January 2, 1991, unless it is
equipped with either an approved airborne windshear warning and flight
guidance system, an approved airborne
detection and avoidance system, or an
approved combination of these systems.
(b) Airplanes manufactured before January 3, 1991. Except as provided in paragraph (c) of this section, after January
2, 1991, no person may operate a turbine-powered airplane manufactured
before January 3, 1991 unless it meets
one of the following requirements as
applicable.
(1) The makes/models/series listed
below must be equipped with either an
approved airborne windshear warning
and flight guidance system, an approved airborne detection and avoidance system, or an approved combination of these systems:
(i) A-300-600;
(ii) A-310 - all series;
(iii) A-320 - all series;
(iv) B-737-300, 400, and 500 series;
(v) B-747-400;
(vi) B-757 - all series;
(vii) B-767 - all series;
(viii) F-100 - all series;
(ix) MD-11 - all series; and
(x) MD-80 series equipped with an
EFIS and Honeywell-970 digital flight
guidance computer.
(2) All other turbine-powered airplanes not listed above must be
equipped with as a minimum requirement, an approved airborne windshear
warning system. These airplanes may
be equipped with an approved airborne

windshear detection and avoidance system, or an approved combination of
these systems.
(c) Extension of the compliance date. A
certificate holder may obtain an extension of the compliance date in paragraph (b) of this section if it obtains
FAA approval of a retrofit schedule. To
obtain approval of a retrofit schedule
and show continued compliance with
that schedule, a certificate holder must
do the following:
(1) Submit a request for approval of a
retrofit schedule by June 1, 1990, to the
appropriate Flight Standards division
manager in the responsible Flight
Standards office.
(2) Show that all of the certificate
holder-s airplanes required to be
equipped in accordance with this section will be equipped by the final compliance date established for TCAS II
retrofit.
(3) Comply with its retrofit schedule
and submit status reports containing
information acceptable to the Administrator. The initial report must be submitted by January 2, 1991, and subsequent reports must be submitted every
six months thereafter until completion
of the schedule. The reports must be
submitted to the certificate holder-s
assigned Principal Avionics Inspector.
(d) Definitions. For the purposes of
this section the following definitions
apply - 
(1) Turbine-powered airplane includes,
e.g., turbofan-, turbojet-, propfan-, and
ultra-high bypass fan-powered airplanes. The definition specifically excludes
turbopropeller-powered
airplanes.
(2) An airplane is considered manufactured on the date the inspection acceptance records reflect that the airplane is complete and meets the FAA
Approved Type Design data.
[Doc. No. 25954, 55 FR 13242, Apr. 9, 1990, as
amended by Docket FAA-2018-0119, Amdt.
121-380, 83 FR 9173, Mar. 5, 2018]

Section 121.359 Cockpit voice recorders.
(a) No certificate holder may operate
a large turbine engine powered airplane
or a large pressurized airplane with
four reciprocating engines unless an
approved cockpit voice recorder is installed in that airplane and is operated
continuously from the start of the use

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