[Code of Federal Regulations]

[Title 14, Volume 3]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR171.7]



[Page 216]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 

                               (CONTINUED)

 

PART 171_NON-FEDERAL NAVIGATION FACILITIES--Table of Contents

 

                        Subpart A_VOR Facilities

 

Sec. 171.7  Performance requirements.



    (a) The VOR must perform in accordance with the ``International 

Standards and Recommended Practices, Aeronautical Telecommunications,'' 

Part I, paragraph 3.3 (Annex 10 to the Convention on International Civil 

Aviation), except that part of paragraph 3.3.2.1 specifying a radio 

frequency tolerance of 0.005 percent, and that part of paragraph 3.3.7 

requiring removal of only the bearing information. In place thereof, the 

frequency tolerance of the radio frequency carrier must not exceed plus 

or minus 0.002 percent, and all radiation must be removed during the 

specified deviations from established conditions and during periods of 

monitor failure.

    (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 periodi- cally, during the in-service 

test evaluation period, for calibration and stability The tests are made 

with a standard ``Reference and variable phase signal generator'' and 

associated test equipment, including an oscilloscope and portable field 

detector. In general, the ground check is conducted in accord- ance with 

section 8.4 of FAA Handbook AF P 6790.9 ``Maintenance Instruction for 

VHF Omniranges'', adapted for the facility concerned.

    (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 201.

    (e) After January 1, 1975, the owner of the VOR shall modify the 

facility to perform in accordance with paragraph 3.3.5.7 of Annex 10 to 

the Convention on International Civil Aviation within 180 days after 

receipt of notice from the Administrator that 50 kHz channel spacing is 

to be implemented in the area and that a requirement exists for 

suppression of 9960 Hz subcarrier harmonics.



[Doc. No. 5034, 29 FR 11337, Aug. 6, 1964, as amended by Amdt. 171-7, 35 

FR 12711, Aug. 11, 1970; Amdt. 171-9, 38 FR 28557, Oct. 15, 1973]



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