86 

14 CFR Ch. I (1–1–24 Edition) 

§ 121.101 

the requirements of paragraph (d) of 
this section as of February 15, 2007. 

[Doc. No. 28154, 62 FR 13256, Mar. 19, 1997, as 
amended by Amdt. 121–329, 72 FR 1878, Jan. 
16, 2007; Amdt. 121–333, 72 FR 31680, June 7, 
2007; Docket FAA–2018–0119, Amdt. 121–380, 83 
FR 9173, Mar. 5, 2018] 

§ 121.101 Weather reporting facilities. 

(a) Each certificate holder con-

ducting domestic or flag operations 
must show that enough weather report-
ing services are available along each 
route to ensure weather reports and 
forecasts necessary for the operation. 

(b) Except as provided in paragraph 

(d) of this section, no certificate holder 
conducting domestic or flag operations 
may use any weather report to control 
flight unless— 

(1) For operations within the 48 con-

tiguous States and the District of Co-
lumbia, it was prepared by the U.S. Na-
tional Weather Service or a source ap-
proved by the U.S. National Weather 
Service; or 

(2) For operations conducted outside 

the 48 contiguous States and the Dis-
trict of Columbia, it was prepared by a 
source approved by the Administrator. 

(c) Each certificate holder con-

ducting domestic or flag operations 
that uses forecasts to control flight 
movements shall use forecasts prepared 
from weather reports specified in para-
graph (b) of this section and from any 
source approved under its system 
adopted pursuant to paragraph (d) of 
this section. 

(d) Each certificate holder con-

ducting domestic or flag operations 
shall adopt and put into use an ap-
proved system for obtaining forecasts 
and reports of adverse weather phe-
nomena, such as clear air turbulence, 
thunderstorms, and low altitude wind 
shear, that may affect safety of flight 
on each route to be flown and at each 
airport to be used. 

[Doc. No. 6258, 29 FR 19194, Dec. 31, 1964, as 
amended by Amdt. 121–27, 36 FR 13911, July 
28, 1971; Amdt. 121–134, 42 FR 27573, May 31, 
1977; Amdt. 121–253, 61 FR 2610, Jan. 26, 1996] 

§ 121.103 En route navigation facili-

ties. 

(a) Except as provided in paragraph 

(b) of this section, each certificate 
holder conducting domestic or flag op-

erations must show, for each proposed 
route (including to any regular, provi-
sional, refueling or alternate airports), 
that suitable navigation aids are avail-
able to navigate the airplane along the 
route within the degree of accuracy re-
quired for ATC. Navigation aids re-
quired for approval of routes outside of 
controlled airspace are listed in the 
certificate holder’s operations speci-
fications except for those aids required 
for routes to alternate airports. 

(b) Navigation aids are not required 

for any of the following operations— 

(1) Day VFR operations that the cer-

tificate holder shows can be conducted 
safely by pilotage because of the char-
acteristics of the terrain; 

(2) Night VFR operations on routes 

that the certificate holder shows have 
reliably lighted landmarks adequate 
for safe operation; and 

(3) Other operations approved by the 

responsible Flight Standards office. 

[Doc. No. FAA–2002–14002, 72 FR 31681, June 7, 
2007, as amended by Docket FAA–2018–0119, 
Amdt. 121–380, 83 FR 9173, Mar. 5, 2018] 

§ 121.105 Servicing and maintenance 

facilities. 

Each certificate holder conducting 

domestic or flag operations must show 
that competent personnel and adequate 
facilities and equipment (including 
spare parts, supplies, and materials) 
are available at such points along the 
certificate holder’s route as are nec-
essary for the proper servicing, mainte-
nance, and preventive maintenance of 
airplanes and auxiliary equipment. 

[Doc. No. 28154, 61 FR 2610, Jan. 26, 1996] 

§ 121.106 ETOPS Alternate Airport: 

Rescue and fire fighting service. 

(a) Except as provided in paragraph 

(b) of this section, the following rescue 
and fire fighting service (RFFS) must 
be available at each airport listed as an 
ETOPS Alternate Airport in a dispatch 
or flight release. 

(1) For ETOPS up to 180 minutes, 

each designated ETOPS Alternate Air-
port must have RFFS equivalent to 
that specified by ICAO as Category 4, 
or higher. 

(2) For ETOPS beyond 180 minutes, 

each designated ETOPS Alternate Air-
port must have RFFS equivalent to 
that specified by ICAO Category 4, or 

87 

Federal Aviation Administration, DOT 

§ 121.115 

higher. In addition, the aircraft must 
remain within the ETOPS authorized 
diversion time from an Adequate Air-
port that has RFFS equivalent to that 
specified by ICAO Category 7, or high-
er. 

(b) If the equipment and personnel re-

quired in paragraph (a) of this section 
are not immediately available at an 
airport, the certificate holder may still 
list the airport on the dispatch or 
flight release if the airport’s RFFS can 
be augmented to meet paragraph (a) of 
this section from local fire fighting as-
sets. A 30-minute response time for 
augmentation is adequate if the local 
assets can be notified while the divert-
ing airplane is en route. The aug-
menting equipment and personnel must 
be available on arrival of the diverting 
airplane and must remain as long as 
the diverting airplane needs RFFS. 

[Doc. No. FAA–2002–6717, 72 FR 1879, Jan. 16, 
2007] 

§ 121.107 Dispatch centers. 

Each certificate holder conducting 

domestic or flag operations must show 
that it has enough dispatch centers, 
adequate for the operations to be con-
ducted, that are located at points nec-
essary to ensure proper operational 
control of each flight. 

[Doc. No. 28154, 61 FR 2610, Jan. 26, 1996] 

Subpart F—Approval of Areas and 

Routes for Supplemental Op-
erations 

S

OURCE

: Docket No. 6258, 29 FR 19195, Dec. 

31, 1964, unless otherwise noted. 

§ 121.111 Applicability. 

This subpart prescribes rules for ob-

taining approval of areas and routes by 
certificate holders conducting supple-
mental operations. 

[Doc. No. 28154, 61 FR 2610, Jan. 26, 1996] 

§ 121.113 Area and route requirements: 

General. 

(a) Each certificate holder con-

ducting supplemental operations seek-
ing route and area approval must 
show— 

(1) That it is able to conduct oper-

ations within the United States in ac-

cordance with paragraphs (a) (3) and (4) 
of this section; 

(2) That it is able to conduct oper-

ations in accordance with the applica-
ble requirements for each area outside 
the United States for which authoriza-
tion is requested; 

(3) That it is equipped and able to 

conduct operations over, and use the 
navigational facilities associated with, 
the Federal airways, foreign airways, 
or advisory routes (ADR’s) to be used; 
and 

(4) That it will conduct all IFR and 

night VFR operations over Federal air-
ways, foreign airways, controlled air-
space, or advisory routes (ADR’s). 

(b) Notwithstanding paragraph (a)(4) 

of this section, the Administrator may 
approve a route outside of controlled 
airspace if the certificate holder con-
ducting supplemental operations shows 
the route is safe for operations and the 
Administrator finds that traffic den-
sity is such that an adequate level of 
safety can be assured. The certificate 
holder may not use such a route unless 
it is approved by the Administrator 
and is listed in the certificate holder’s 
operations specifications. 

[Doc. No. 6258, 29 FR 19195, Dec. 31, 1964, as 
amended by Amdt. 121–253, 61 FR 2610, Jan. 
26, 1996] 

§ 121.115 Route width. 

(a) Routes and route segments over 

Federal airways, foreign airways, or 
advisory routes have a width equal to 
the designated width of those airways 
or advisory routes. Whenever the Ad-
ministrator finds it necessary to deter-
mine the width of other routes, he con-
siders the following: 

(1) Terrain clearance. 
(2) Minimum en route altitudes. 
(3) Ground and airborne navigation 

aids. 

(4) Air traffic density. 
(5) ATC procedures. 
(b) Any route widths of other routes 

determined by the Administrator are 
specified in the certificate holder’s op-
erations specifications. 

[Doc. No. 6258, 29 FR 19195, Dec. 31, 1964, as 
amended by Amdt. 121–253, 61 FR 2610, Jan. 
26, 1996]