Section 171.155

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

Section 171.155 Minimum requirements for
approval.
(a) The following are the minimum
requirements that must be met before
the Federal Aviation Administration
will approve an IFR procedure for a
non-Federal DME:
(1) A suitable frequency channel
must be available.
(2) The facility-s performance, as determined by air and ground inspection,
must meet the requirements of
Section 171.157.
(3) The installation of the equipment
must meet the requirements of
Section 171.159.
(4) The owner must agree to operate
and maintain the facility in accordance with Section 171.161.
(5) The owner must agree to furnish
periodic reports, as set forth in
Section 171.163, and must agree to allow the
Federal Aviation Administration to inspect the facility and its operation
whenever necessary.
(6) The owner must assure the Federal Aviation Administration that he
will not withdraw the facility from
service without the permission of the
Federal Aviation Administration.
(7) 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 Federal Aviation
Administration 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is withdrawn at any time the facility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.
Section 171.157 Performance requirements.
(a) The DME must meet the performance requirements set forth in the
 - International Standards and Recommended
Practices.
Aeronautical
Telecommunications, Part I, Paragraph 3.5 -  (Annex 10 to the Convention
of International Civil Aviation).
(b) It must be shown during ground
inspection of the design features of the

equipment that there will not be conditions that will allow unsafe operations
because of component failure or deterioration.
(c) The monitor must be checked periodically, during the in-service test
evaluation period, for calibration and
stability. These tests and ground tests
of the functional and performance
characteristics of the DME transponder
must be conducted in accordance with
the maintenance manual required by
Section 171.161(b).
(d) Flight inspection to determine
the adequacy of the facility-s operational performance and compliance
with applicable  - Standards and Recommended Practices -  must be accomplished in accordance with the  - U.S.
Standard Flight Inspection Manual. - 
[Doc. No. 10116, 35 FR 12715, Aug. 11, 1970, as
amended by Amdt. 171-13, 50 FR 4875, Nov. 27,
1985]

Section 171.159

Installation requirements.

(a) The facility must be installed according to accepted good engineering
practices, applicable electric and safety codes, and Federal Communications
Commission requirements.
(b) The facility must have a reliable
source of suitable primary power, either from a power distribution system
or locally generated, with a supplemental standby system, if needed.
(c) Dual transmitting equipment
with automatic changeover is preferred
and may be required to support certain
IFR procedures.
(d) There must be a means for determining from the ground, the performance of the equipment, initially and periodically.
(e) A facility intended for use as an
instrument approach aid for an airport
must have or be supplemented by the
following ground air or landline communications services:
(1) At facilities outside of and not immediately adjacent to controlled airspace, there must be ground-air communications from the airport served by
the facility. Separate communications
channels are acceptable.
(2) At facilities within or immediately adjacent to controlled airspace,
there must be the ground-air communications required by paragraph (e)(1)

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