background image

73 

Federal Aviation Administration, DOT 

§ 121.103 

over the entire route. The communica-
tions may be direct links or via an ap-
proved communication link that will 
provide reliable and rapid communica-
tions under normal operating condi-
tions between each airplane and the ap-
propriate dispatch office, and between 
each airplane and the appropriate air 
traffic control unit. 

(b) Except in an emergency, for all 

flag and domestic kinds of operations, 
the communications systems between 
each airplane and the dispatch office 
must be independent of any system op-
erated by the United States. 

(c) Each certificate holder con-

ducting flag operations must provide 
voice communications for ETOPS 
where voice communication facilities 
are available. In determining whether 
facilities are available, the certificate 
holder must consider potential routes 
and altitudes needed for diversion to 
ETOPS Alternate Airports. Where fa-
cilities are not available or are of such 
poor quality that voice communication 
is not possible, another communication 
system must be substituted. 

(d) Except as provided in paragraph 

(e) of this section, after February 15, 
2008 for ETOPS beyond 180 minutes, 
each certificate holder conducting flag 
operations must have a second commu-
nication system in addition to that re-
quired by paragraph (c) of this section. 
That system must be able to provide 
immediate satellite-based voice com-
munications of landline-telephone fi-
delity. The system must be able to 
communicate between the flight crew 
and air traffic services, and the flight 
crew and the certificate holder. In de-
termining whether such communica-
tions are available, the certificate 
holder must consider potential routes 
and altitudes needed for diversion to 
ETOPS Alternate Airports. Where im-
mediate, satellite-based voice commu-
nications are not available, or are of 
such poor quality that voice commu-
nication is not possible, another com-
munication system must be sub-
stituted. 

(e) Operators of two-engine turbine- 

powered airplanes with 207 minute 
ETOPS approval in the North Pacific 
Area of Operation must comply with 

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] 

§ 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 

VerDate Sep<11>2014 

11:40 Jan 24, 2018

Jkt 244048

PO 00000

Frm 00083

Fmt 8010

Sfmt 8010

Q:\14\14V3.TXT

31

kpayne on DSK54DXVN1OFR with $$_JOB