138 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.351 

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 

(3) At least one of the communica-

tion systems must have two-way voice 
communication capability. 

(b) No certificate holder conducting a 

flag or supplemental operation or a do-
mestic operation within the State of 

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