Section 171.45

14 CFR Ch. I (1-1-19 Edition)

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]

Section 171.45 Minimum requirements for approval.
(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 determined by air and ground inspection,
must meet the requirements of Section 171.47.
(2) The installation of the equipment
must meet the requirements of Section 171.49.
(3) The owner must agree to operate
and maintain the facility in accordance with Section 171.51.
(4) The owner must agree to furnish
periodic reports, as set forth in Section 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 section and of any flight or ground inspections made before the facility is commissioned, except that the Federal
Aviation Administration may bear certain 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 commissions the facility as a prerequisite to
its approval for use in an IFR procedure. The approval is withdrawn at any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 system service.
[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as
amended by Amdt. 171-6, 35 FR 10288, June
24, 1970]

Section 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, Paragraph 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 directions outside the 20-degree sector centered on the course line to reduce localizer 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 suppression of radiation to the rear of the antenna array to satisfy difficult siting
positions (as per 3.1.3.1.4) is not allowed. For example, if a reflector
screen for the antenna array is required 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 exceed 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 component failure or deterioration.
(c) The monitor is checked periodically, during the in-service test evaluation period, for calibration and stability. These tests, and ground checks
of glide slope and localizer radiation
characteristics, are conducted in accordance with FAA Handbooks AF P
6750.1 and AF P 6750.2  - Maintenance Instructions for ILS Localizer Equipment -  and  - Maintenance Instructions
for ILS Glide Slope Equipment - .
(d) Flight tests to determine the facility-s adequacy for operational requirements and compliance with applicable  - Standards and Recommended
Practices -  are conducted in accordance with the  - U.S. Standard Flight
Inspection Manual - , particularly section 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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