[Federal Register Volume 70, Number 73 (Monday, April 18, 2005)]
[Notices]
[Page 20202]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 05-7619]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


Airborne Selective Calling Equipment

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of availability and request for public comment.

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SUMMARY: This notice announces the availability of, and requests 
comment on proposed Technical Standard Order (TSO) C-59a, Airborne 
Selective Calling (SELCAL) Equipment. This proposed TSO tells persons 
seeking a TSO authorization or letter of design approval what minimum 
performance standards (MPS) their SELCAL must meet to be identified 
with the appropriate TSO marking.

DATES: Comments must be received on or before May 18, 2005.

ADDRESSES: Send all comments on this proposed TSO to: Federal Aviation 
Administration (FAA), Aircraft Certification Service, Aircraft 
Engineering Division, Avionics Systems Branch (AIR-130), 800 
Independence Avenue SW., Washington, DC 20591. ATTN: Mr. David 
Robinson. Or, you may deliver comments to: Federal Aviation 
Administration, Room 815, 800 Independence Avenue SW., Washington, DC 
20591.

FOR FURTHER INFORMATION CONTACT: Mr. David Robinson, AIR-130, Room 815, 
Federal Aviation Administration, 800 Independence Avenue SW., 
Washington, DC 20591. Telephone (202) 385-4650, FAX: (202) 385-4651.

SUPPLEMENTARY INFORMATION:

Comments Invited

    You are invited to comment on the proposed TSO by submitting 
written data, views, or arguments to the above address. Comments 
received may be examined, both before and after the closing date, in 
room 815 at the above address, weekdays except federal holidays, 
between 8:30 a.m. and 4:30 p.m. The Director, Aircraft Certification 
Service, will consider all comments received on or before the closing 
date before issuing the final TSO.

Background

    This TSO prescribes the minimum performance standard for airborne 
selective calling (SELCAL) equipment intended to permit selective 
calling of individual aircraft over approved communications channels 
linking the ground station with the aircraft. The system is designed to 
operate with existing high frequency (HF) and very high frequency (VHF) 
ground-to-air transmitters and receivers.

How To Obtain Copies

    You can view or download the proposed TSO from its online location 
at: http://www.airweb.faa.gov/rgl. At this web page, select ``Technical 
Standard Orders.'' At the TSO page, select ``Proposed Orders.'' For a 
paper copy, contact the person list in For Further Information Contact.

    Dated: Issued in Washington, DC, on April 11, 2005.
Susan J. M. Cabler,
Acting Manager, Aircraft Engineering Division, Aircraft Certification 
Service.
[FR Doc. 05-7619 Filed 4-15-05; 8:45 am]
BILLING CODE 4910-13-M