[Federal Register: December 5, 2005 (Volume 70, Number 232)]
[Notices]
[Page 72499-72500]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr05de05-114]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Aircraft, Trip-Free Single Phase 115 VAC, 400 Hz Arc Fault
Circuit Breakers
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-178, Aircraft,
Trip-Free Single Phase 115 VAC, 400 Hz Arc Fault Circuit Breakers. This
proposed TSO tells persons seeking a TSO authorization or letter of
design approval what minimum performance standards (MPS) their arc
fault circuit breakers must meet to be identified with the appropriate
TSO marking.
DATES: Comments must be received on or before January 4, 2006.
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: Ms. Charisse
Green. Or, you may deliver comments to: Federal Aviation
Administration, Room 815, 800 Independence Avenue, SW., Washington, DC
20591.
FOR FURTHER INFORMATION CONTACT: Ms. Charisse Green, AIR-130, Room 815,
Federal Aviation Administration, 800 Independence Avenue, SW.,
Washington, DC 20591. Telephone (202) 385-4637, 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
The proposed TSO-C178 provides a minimum operating standard for
Trip-
[[Page 72500]]
Free Single Phase 115 VAC, 400 Hz circuit breakers, which provides an
equivalent level of thermal protection to existing thermal circuit
breakers, with the added ability of detection and reaction to arc fault
conditions, thus diminishing damage to the wiring system caused by
prolonged arcing events. The Arc Fault Circuit Breaker thereby
diminishes damage to the aircraft wiring from the circuit breaker to
the first serial load element, which reduces the potential of igniting
surrounding material.
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 TSOs.'' For a
paper copy, contact the person listed in FOR FURTHER INFORMATION
CONTACT. Note, SAE International documents are copyrighted and may not
be reproduced without the written consent of SAE International. You may
purchase copies of SAE International documents from: SAE International,
400 Commonwealth Drive, Warrendale, PA 15096-0001, or directly from
their Web site: http://www.sae.org/.
Issued in Washington, DC, on November 28, 2005.
Susan J. M. Cabler,
Assistant Manager, Aircraft Engineering Division, Aircraft
Certification Service.
[FR Doc. 05-23631 Filed 12-2-05; 8:45 am]
BILLING CODE 4910-13-M