[Federal Register: November 22, 2005 (Volume 70, Number 224)]
[Notices]
[Page 70653]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr22no05-121]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Advisory Circular 25.981-2A, Fuel Tank Flammability
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of available of proposed Advisory Circular (AC) 25.981-
2A, and request for comments.
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SUMMARY: This notice announces the availability of and requests
comments on a proposed advisory circular (AC) which sets forth an
acceptable means, but not the only means, of demonstration compliance
with the provisions of the airworthiness standards for transport
category airplanes related to Fuel Tank Flammability Reduction. This
proposed AC complements revisions to the airworthiness standards that
are being proposed by a separate notice. This notice is necessary to
give all interested persons an opportunity to present their views on
the proposed AC.
DATES: Comments must be received on or before March 20, 2006.
ADDRESSES: Send all comments on proposed AC to: Federal Aviation
Administration, Attention: Mike Dostert, Propulsion/Mechanical Systems
Branch, ANM-112, FAA, Transport Airplane Directorate, Aircraft
Certification Service, 1601 Lind Avenue SW., Renton, WA 98055-4056.
Comments may be inspected at the above address between 7:30 a.m. and 4
p.m. weekdays, except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Jan Thor, Transport Standards Staff,
at the address above, telephone (425) 227-2127.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to comment on the proposed AC by
submitting such written data, views, or arguments, as they may desire.
Commenters should identify AC 25.981-2A and submit comments, in
duplicate, to the address specified above. All communications received
on or before the closing date for comments will be considered by the
Transport Standards Staff before issuing the final AC. The proposed AC
can be found and downloaded from the Internet at http://www.airweb.faa.gov/rgl
under ``Draft Advisory Circulars.'' A paper copy
of the proposed AC may be obtained by contacting the person named above
under the caption FOR FURTHER INFORMATION CONTACT.
Discussion
This proposed AC provides information and guidance on compliance
with the airworthiness standards for transport category airplanes about
limiting the time a fuel tank may be flammable or mitigation of hazards
from flammable fuel air mixtures within fuel tanks. This guidance is
applicable to transport category airplanes for which a new, amended, or
supplemental type certificate is requested and affected existing design
approval holders as stated in proposed Sec. Sec. 25.1815, 25.1817,
25.1819, and 25.1821 contained in a proposed new subpart I to Title 14,
Code of Federal Regulations (14 CFR) part 25, ``Continued Airworthiness
and Safety Improvement.'' The AC also provides guidance on compliance
with the associated proposed requirements for operators of affected
airplanes that must comply with the requirements of 14 CFR parts 91,
121, 125, and 129 (for a foreign person or foreign air carrier
operating a U.S.-registered airplane) to incorporate flammability
mitigation means by specified dates.
The Notice of Proposed Rulemaking would not apply the proposed new
requirements to transport category airplanes designed solely for cargo
carriage. However, AC 25.981-2 remains applicable to these airplanes,
which must comply with the current flammability standards contained in
Sec. 25.981(c) that would be moved to the proposed section Sec.
25.981(e). We will consider combining this guidance for all transport
category airplanes into one AC when the final rule and AC are issued.
It is one means, but not the only means, of complying with the part
25 revisions proposed in Notice No. 05-14 entitled ``Fuel Tank
Flammability Reduction,'' published in this same edition of the Federal
Register. Issuance of AC 25.981-2A is contingent on final adoption of
the proposed revisions to part 25.
Issued in Renton, Washington, on November 16, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-23100 Filed 11-21-05; 8:45 am]
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