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NOTICE: NOTICES

DOCUMENT ACTION: Notice of availability.

SUBJECT CATEGORY: Crewmember Demand Oxygen Mask

DATES: TSO-C78a will be available on or before June 13, 2008.

DOCUMENT SUMMARY: This notice announces the availability of Technical Standard Order (TSO) C78a, Crewmember Demand Oxygen Mask. This TSO tells persons seeking a TSO authorization (TSOA) or letter of design approval (LODA) what minimum performance standards (MPS) their crewmember demand oxygen mask must meet to be identified with the appropriate TSO marking. This TSO has been revised to address a general requirement for oxygen masks to be supplied with an oxygen supply tube.

SUMMARY: Crewmember Demand Oxygen Mask,

SUPPLEMENTAL INFORMATION

TSO C78a addresses crewmember demand oxygen masks and breathing valves that use either panel mounted or mask mounted demand and pressuredemand oxygen regulators.

This ``a'' revision to TSOC78, became effective on February 13, 2008. Shortly after its release, we determined that the general requirement to provide an oxygen supply tube for Type II and Type IV oxygen masks needed to be revised. While an oxygen supply tube is a required component of the Type II and Type IV oxygen mask, the original TSO C78 manufacturers are approved to provide oxygen supply tubes of different lengths. The lengths of those oxygen tubes provided by the manufacturer are aircraft specific. As is the case with all FAA approved TSO articles, which are only design and production approvals, the installation of a TSO C78 or C78a approved crewmember demand oxygen mask requires a separate installation approval. Therefore, to eliminate any confusion, we revised appendix 1 of TSO C78a by removing changes we made to paragraph 3.9, Oxygen Supply Tube, regarding the length of the oxygen supply tube.

How to Obtain Copies

You can view or download TSO C78a from its online location at: http:// [[Page 27888]]
www.faa.gov/regulationspolicies/ordersnotices/. At this Web page, select Technical Standard Orders (TSO) Database. At the TSO page, select ``Current.'' For a paper copy, contact the person listed in For Further Information Contact. Note that referenced 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 150960001, or directly from their Web site: http://www.sae.org/.

Issued in Washington, DC, on May 7, 2008.
Susan J. M. Cabler,
Assistant Manager, Aircraft Engineering Division, Aircraft Certification Service.
[FR Doc. E810555 Filed 51308; 8:45 am]
BILLING CODE 491013M

FOR FURTHER INFORMATION CONTACT Mr. John Petrakis, AIR-120, Room 815, Federal Aviation Administration, 800 Independence Avenue, SW., Washington, DC 20591. Telephone (202) 2679274, fax (202) 2675340, or email at: john.petrakis@faa.gov.