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822 

14 CFR Ch. I (1–1–24 Edition) 

§ 171.33 

voice announcement, and the time 
spacing of the identification. 

(c) If the owner desires to modify the 

facility, he must submit the proposal 
to the FAA and meet applicable re-
quirements of the FCC. 

(d) The owner’s maintenance per-

sonnel must participate in initial in-
spections made by the FAA. In the case 
of subsequent inspections, the owner or 
his representative shall participate. 

(e) The owner shall provide a stock of 

spare parts, including vacuum tubes, of 
such a quantity to make possible the 
prompt replacement of components 
that fail or deteriorate in service. 

(f) The owner shall close the facility 

upon receiving two successive pilot re-
ports of its malfunctioning. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–2, 31 FR 5408, Apr. 6, 
1966] 

§ 171.33 Reports. 

The owner of each facility to which 

this subpart applies shall make the fol-
lowing reports, at the times indicated, 
to the FAA Regional office for the area 
in which the facility is located: 

(a) 

Record of meter readings and adjust-

ments 

(

Form FAA–198

). To be filled out 

by the owner or his maintenance rep-
resentative with the equipment adjust-
ments and meter readings as of the 
time of commissioning, with one copy 
to be kept in the permanent records of 
the facility and two copies to the ap-
propriate Regional Office of the FAA. 
The owner shall revise the form after 
any major repair, modernization, or re-
turning, to reflect an accurate record 
of facility operation and adjustment. 

(b) 

Facility maintenance log 

(

FAA Form 

6030–1

). This form is a permanent 

record of all equipment malfunctioning 
met in maintaining the facility, in-
cluding information on the kind of 
work and adjustments made, equip-
ment failures, causes (if determined), 
and corrective action taken. The owner 
shall keep the original of each report 
at the facility and send a copy to the 
appropriate Regional Office of the FAA 
at the end of the month in which it is 
prepared. 

(c) 

Radio equipment operation record 

(

Form FAA–418

). To contain a complete 

record of meter readings, recorded on 
each scheduled visit to the facility. 

The owner shall keep the original of 
each month’s record at the facility and 
send a copy of it to the appropriate Re-
gional Office of the FAA. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–10, 40 FR 36110, Aug. 
19, 1975] 

Subpart C—Instrument Landing 

System (ILS) Facilities 

§ 171.41 Scope. 

This subpart sets forth minimum re-

quirements for the approval and oper-
ation of non-Federal Instrument Land-
ing System (ILS) Facilities that are to 
be involved in the approval of instru-
ment flight rules and air traffic control 
procedures related to those facilities. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as 
amended by Amdt. 171–2, 31 FR 5408, Apr. 6, 
1966; Amdt. 171–7, 35 FR 12711, Aug. 11, 1970] 

§ 171.43 Requests for IFR procedure. 

(a) Each person who requests an IFR 

procedure based on an ILS facility that 
he owns must submit the following in-
formation with that request: 

(1) A description of the facility and 

evidence that the equipment meets the 
performance requirements of § 171.47 
and is installed in accordance with 
§ 171.49. 

(2) A proposed procedure for oper-

ating the facility. 

(3) A proposed maintenance organiza-

tion and a maintenance manual that 
meets the requirements of § 171.51. 

(4) A statement of intent to meet the 

requirements of this subpart. 

(5) A showing that the facility has an 

acceptable level of operational reli-
ability and an acceptable standard of 
performance. Previous equivalent oper-
ational experience with a facility with 
identical design and operational char-
acteristics will be considered in show-
ing compliance with this subparagraph. 

(b) After the FAA inspects and evalu-

ates the facility, it advises the owner 
of the results and of any required 
changes in the facility or the mainte-
nance manual or maintenance organi-
zation. The owner must then correct 
the deficiencies, if any, and operate the 

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823 

Federal Aviation Administration, DOT 

§ 171.47 

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] 

§ 171.45 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 Instrument Landing 
System: 

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

termined by air and ground inspection, 
must meet the requirements of § 171.47. 

(2) The installation of the equipment 

must meet the requirements of § 171.49. 

(3) The owner must agree to operate 

and maintain the facility in accord- 
ance with § 171.51. 

(4) The owner must agree to furnish 

periodic reports, as set forth in § 171.53 
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] 

§ 171.47 Performance requirements. 

(a) The Instrument Landing System 

must perform in accordance with the 
‘‘International Standards and Rec-

ommended Practices, Aeronautical 
Telecommunications, Part I, Para-
graph 3.1’’ (Annex 10 to the Convention 
on International Civil Aviation) except 
as follows: 

(1) The first part of paragraph 3.1.3, 

relating to suppression of radiation 
wholly or in part in any or all direc-
tions outside the 20-degree sector cen-
tered on the course line to reduce lo-
calizer does not apply. 

(2) Radiation patterns must conform 

to limits specified in 3.1.3.3 and 3.1.3.4, 
but this does not mean that suppres-
sion of radiation to the rear of the an-
tenna array to satisfy difficult siting 
positions (as per 3.1.3.1.4) is not al-
lowed. For example, if a reflector 
screen for the antenna array is re-
quired to overcome a siting problem, 
the area to the rear of the localizer 
may be made unusable and should be so 
advertised. 

(3) A third marker beacon (inner 

marker) is not required. 

(4) The frequency tolerance of the 

radio frequency carrier must not ex-
ceed plus or minus 0.002 percent. 

(b) Ground inspection consists of an 

examination of the design features of 
the equipment to determine that there 
will not be conditions that will allow 
unsafe operations because of compo-
nent failure or deterioration. 

(c) The monitor is checked periodi-

cally, during the in-service test evalua-
tion period, for calibration and sta-
bility. These tests, and ground checks 
of glide slope and localizer radiation 
characteristics, are conducted in ac-
cordance with FAA Handbooks AF P 
6750.1 and AF P 6750.2 ‘‘Maintenance In-
structions for ILS Localizer Equip-
ment’’ and ‘‘Maintenance Instructions 
for ILS Glide Slope Equipment’’. 

(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 217. 

[Doc. No. 5034, 29 FR 11337, Aug. 6, 1974, as 
amended by Amdt. 171–9, 38 FR 28557, Oct. 15, 
1973]