820 

14 CFR Ch. I (1–1–24 Edition) 

§ 171.25 

facility for an in-service evaluation by 
the FAA. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–7, 35 FR 12711, Aug. 11, 
1970] 

§ 171.25 Minimum requirements for ap-

proval. 

(a) The following are the minimum 

requirements that must be met before 
the FAA will approve an IFR procedure 
for a non-Federal, nondirectional radio 
beacon facility under this subpart: 

(1) The facility’s performances, as de-

termined by air and ground inspection, 
must meet the requirements of § 171.27. 

(2) The installation of the equipment 

must meet the requirements of § 171.29. 

(3) The owner must agree to operate 

and maintain the facility in accord- 
ance with § 171.31. 

(4) The owner must agree to furnish 

periodic reports, as set forth in § 171.33, 
and agree to allow the FAA to inspect 
the facility and its operation whenever 
necessary. 

(5) The owner must assure the FAA 

that he will not withdraw the facility 
from service without the permission of 
the FAA. 

(6) The owner must bear all costs of 

meeting the requirements of this sec-
tion and of any flight or ground inspec-
tions made before the facility is com-
missioned, except that the Federal 
Aviation Administration may bear cer-
tain of these costs subject to budgetary 
limitations and policy established by 
the Administrator. 

(b) If the applicant for approval 

meets the requirements of paragraph 
(a) of this section, the FAA commis-
sions the facility as a prerequisite to 
its approval for use in an IFR proce-
dure. The approval is withdrawn at any 
time the facility does not continue to 
meet those requirements. In addition, 
the facility may be de-commissioned 
whenever the frequency channel is 
needed for higher priority common sys-
tem service. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–6, 35 FR 10288, June 
24, 1970] 

§ 171.27 Performance requirements. 

(a) The facility must meet the per-

formance requirements set forth in the 
‘‘International Standards and Rec-

ommended Practices, Aeronautical 
Telecommunications, Part I, paragraph 
3.4’’ (Annex 10 to the Convention on 
International Civil Aviation), except 
that identification by on-off keying of 
a second carrier frequency, separated 
from the main carrier by 1020 Hz plus 
or minus 50 Hz, is also acceptable. 

(b) The facility must perform in ac-

cordance with recognized and accepted 
good electronic engineering practices 
for the desired service. 

(c) Ground inspection consists of an 

examination of the design features of 
the equipment to determine (based on 
recognized and accepted good engineer-
ing practices) that there will not be 
conditions that will allow unsafe oper-
ations because of component failure or 
deterioration. 

(d) Flight tests to determine the fa-

cility’s adequacy for operational re-
quirements and compliance with appli-
cable ‘‘Standards and Recommended 
Practices’’ are conducted in accord- 
ance with the ‘‘U.S. Standard Flight 
Inspection Manual’’, particularly sec-
tion 207. The original test is made by 
the FAA and later tests shall be made 
under arrangements, satisfactory to 
the FAA, that are made by the owner. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–7, 35 FR 12711, Aug. 11, 
1970] 

§ 171.29 Installation requirements. 

(a) The facility must be installed ac-

cording to accepted good engineering 
practices, applicable electric and safe-
ty codes, and FCC licensing require-
ments. 

(b) The facility must have a reliable 

source of suitable primary power. 

(c) Dual transmitting equipment may 

be required to support some IFR proce-
dures. 

(d) A facility intended for use as an 

instrument approach aid for an airport 
must have or be supplemented by (de-
pending on the circumstances) the fol-
lowing ground-air or landline commu-
nications services: 

(1) At facilities outside of and not im-

mediately adjacent to controlled air-
space, there must be ground-air com-
munications from the airport served by 
the facility. Voice on the aid con-
trolled from the airport is acceptable. 

821 

Federal Aviation Administration, DOT 

§ 171.31 

(2) At facilities within or imme-

diately adjacent to controlled airspace, 
there must be the ground-air commu-
nications required by paragraph (d)(1) 
of this section and reliable communica-
tions (at least a landline telephone) 
from the airport to the nearest FAA 
air traffic control or communication 
facility. 

Paragraphs (d) (1) and (2) of this sec-
tion are not mandatory at airports 
where an adjacent FAA facility can 
communicate with aircraft on the 
ground at the airport and during the 
entire proposed instrument approach 
procedure. In addition, at low traffic 
density airports within or immediately 
adjacent to controlled airspace, and 
where extensive delays are not a fac-
tor, the requirements of paragraphs (d) 
(1) and (2) of this section may be re-
duced to reliable communications (at 
least a landline telephone) from the 
airport to the nearest FAA air traffic 
control or communications facility, if 
an adjacent FAA facility can commu-
nicate with aircraft during the pro-
posed instrument approach procedure, 
at least down to the minimum en route 
altitude for the controlled airspace 
area. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–16, 56 FR 65664, Dec. 
17, 1991] 

§ 171.31 Maintenance and operations 

requirements. 

(a) The owner of the facility must es-

tablish an adequate maintenance sys-
tem and provide qualified maintenance 
personnel to maintain the facility at 
the level attained at the time it was 
commissioned. Each person who main-
tains a facility must meet at least the 
Federal Communications Commission’s 
licensing requirements and show that 
he has the special knowledge and skills 
needed to maintain the facility includ-
ing proficiency in maintenance proce-
dures and the use of specialized test 
equipment. 

(b) The owner must prepare, and ob-

tain approval of, an operations and 
maintenance manual that sets forth 
mandatory procedures for operations, 
preventive maintenance, and emer-
gency maintenance, including instruc-
tions on each of the following: 

(1) Physical security of the facility. 

(2) Maintenance and operations by 

authorized persons only. 

(3) FCC licensing requirements for 

operating and maintenance personnel. 

(4) Posting of licenses and signs. 
(5) Relations between the facility and 

FAA air traffic control facilities, with 
a description of the boundaries of con-
trolled airspace over or near the facil-
ity, instructions for relaying air traffic 
control instructions and information 
(if applicable), and instructions for the 
operation of an air traffic advisory 
service if the facility is located outside 
of controlled airspace. 

(6) Notice to the Administrator of 

any suspension of service. 

(7) Detailed arrangements for main-

tenance flight inspection and servicing 
stating the frequency of servicing. 

(8) Air-ground communications, if 

provided, expressly written or incor-
porating appropriate sections of FAA 
manuals by reference. 

(9) Keeping of station logs and other 

technical reports, and the submission 
of reports required by § 171.33. 

(10) Monitoring of the facility, at 

least once each half hour, to assure 
continuous operation. 

(11) Inspections by United States per-

sonnel. 

(12) Names, addresses, and telephone 

numbers of persons to be notified in an 
emergency. 

(13) Shutdowns for routine mainte-

nance and issue of ‘‘Notices to Airmen’’ 
for routine or emergency shutdowns 
(private use facilities may omit the 
‘‘Notices to Airmen’’). 

(14) Commissioning of the facility. 
(15) An acceptable procedure for 

amending or revising the manual. 

(16) The following information con-

cerning the facility: 

(i) Location by latitude and lon-

gitude to the nearest second, and its 
position with respect to airport lay-
outs. 

(ii) The type, make, and model of the 

basic radio equipment that will provide 
the service. 

(iii) The station power emission and 

frequency. 

(iv) The hours of operation. 
(v) Station identification call letters 

and method of station identification, 
whether by Morse code or recorded