[Federal Register: December 14, 2004 (Volume 69, Number 239)]
[Notices]
[Page 74563]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14de04-115]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Advisory Circulars 25.856-1X, Thermal/Acoustic
Insulation Flame Propagation Test Method Details; and 25.856-2X,
Installation of Thermal/Acoustic Insulation for Burnthrough Protection
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed advisory circulars and request for comments.
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SUMMARY: The Federal Aviation Administration invites public comment on
two draft advisory circulars concerning thermal.acoustic insulation
installed on transport category airplanes. The draft advisory material
provides for demonstrating compliance with amendment 25-111, which was
adopted on July 31, 2003.
DATE: Comments must be received on or before January 28, 2005.
ADDRESSES: You should send your comments to the Federal Aviation
Administration, Transport Airplane Directorate, Attention: Jeff
Gardlin, Airframe/Cabin Safety Branch, ANM-115, Transport Airplane
Directorate, Aircraft Certification Service, 1601 Lind Avenue SW.,
Renton, Washington 98055-4056. You may also fax your comments to (425)
227-1149, or you may send them electronically to: jeff.gardlin@faa.gov.
You may review all comments received at the above address between 7:30
a.m. and 4 p.m. weekdays, except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Jeff Gardlin at the above address,
telephone (425) 227-2136.
SUPPLEMENTARY INFORMATION:
How Do I Obtain a Copy of the Proposed Advisory Circular?
An electronic copy of the draft advisory circulars is available at
the following Internet address: http://www.airweb.faa.gov/rgl. If you
do not have access to the Internet, you may request a copy by
contacting Jeff Gardlin at the address or phone number listed above.
How Do I Submit Comments on the Proposed Advisory Circular
You are invited to comment on the draft ACs by submitting written
comments, data, or views. Please identify the ACs by title and number.
You should submit your comments to the address specified above. We will
consider all comments that we receive on or before the closing date for
comments before issuing the final AC.
Discussion
On July 31, 2003, we published amendment 25-111 to 14 CFR part 25
(68 FR 45046). That amendment added new fire protection requirements
applicable to thermal/acoustic insulation materials. It introduced a
new test method and requirement that improves the fire penetration
resistance of those materials, and added new test requirements related
to flame propagation and burnthrough penetration resistance.
We have developed two draft advisory circulars to assist in
demonstrating compliance with amendment 25-111. These ACs are:
AC 25.756-1X, ``Thermal/Acoustic Insulation Flame
Propagation Test Method Details.'' This AC describes the test method to
determine the flammability and flame propagation characteristics of
thermal/acoustic insulation materials. It addresses issues such as test
sample construction, test conduct considerations, and the applicability
of amendment 25-111 to certain materials and installations.
AC 25.856-2X, ``Installation of Thermal/Acoustic
Insulation for Burnthrough Protection.'' This AC provides guidance
concerning the test method to determine the burnthrough resistance of
thermal/acoustic insulation materials installed in transport category
airplanes. Also included is guidance on the installation details and
techniques, as well as test condition details.
Issued in Renton, Washington, on December 3, 2004.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-27359 Filed 12-13-04; 8:45 am]
BILLING CODE 4910-13-M