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TSO-C163, VDL Mode 3 Communications Equipment Operating Within the Frequency Range 117.975 to 137.000 Megahertz (MHz)

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Federal Aviation Administration, DOT.


Availability of TSO-C163.


This notice announces the availability of the Technical Standard Order (TSO) for VDL Mode 3 Communications Equipment Operating within the Frequency Range 117.975 to 137.000 MHz. The VDL Mode 3 TSO recognizes the RTCA document No. (RTCA/DO)-271B, Minimum Operational Performance Standards (MOPS) for Aircraft VDL Mode 3 Transceiver Operating in the Frequency Range 117.975-137.000 MHz, as the minimum performance standards (MPS) for VDL Mode 3 equipment.


The effective date for TSO-C163 is April 29, 2004.

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Mr. Gregory E. Frye, Federal Aviation Administration, Aircraft Engineering Division, Aircraft Certification Service, AIR-130, 470 L'Enfant Plaza, Suite 4107, SW., Washington, DC 20024; Telephone: (202) 385-4649, FAX: (202) 385-4651; E-mail address:

How To Obtain Copies

You may get a copy of TSO-C163 from the Internet at (​tso/​Tsocur/​Current.htm). See section entitled for further information contact for the complete address if requesting a copy by mail. You may inspect the RTCA document at: Federal Aviation Administration (FAA), Aircraft Certification Service, Aircraft Engineering Division, Room 815, 800 Independence Avenue, SW., Washington, DC 20591, weekdays except Federal holidays, between 8:30 Start Printed Page 24705a.m. and 4:30 p.m. However, RTCA documents are copyrighted and may not be reproduced without the written consent of RTCA, Inc. You may purchase copies of Document No. RTCA/DO-271B from: RTCA Inc., 1828 L Street, NW., Suite 807, Washington, DC 20036 (Web site:

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Issued in Washington, DC, on April 29, 2004.

Susan J. M. Cabler,

Assistant Manager, Aircraft Engineering Division, Aircraft Certification Service.

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[FR Doc. 04-10122 Filed 5-3-04; 8:45 am]