812
14 CFR Ch. I (1–1–19 Edition)
§ 171.45
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 The approval is withdrawn at any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]
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