[Federal Register: December 19, 2005 (Volume 70, Number 242)]
[Notices]
[Page 75235-75236]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr19de05-97]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Advisory Circular 25.21-1X, Performance and Handling
Characteristics in the Icing Conditions Specified in Part 25, Appendix
C
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of availability of proposed Advisory Circular (AC)
25.21-1X and request for comments; extension of comment period.
-----------------------------------------------------------------------
SUMMARY: This notice announces the extension of the comment period for
Notice of availability of proposed Advisory Circular (AC) 25.21-1X, and
request for comments, which was published in the Federal Register on
November 4, 2005 (70 FR 67303), and closes on January 3, 2006. In that
notice, the FAA invited public comment on a proposed AC which provides
guidance on a means, but not the only means, of compliance with the
proposed certification requirements for performance and handling
characteristics of transport category airplanes affected by flight in
the icing conditions defined in appendix C of Title 14, Code of Federal
Regulations (CFR) part 25. This extension of the comment period 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 February 2, 2006.
ADDRESSES: Send all comments on the proposed AC to: Federal Aviation
Administration, Attention: Don Stimson, Airplane and Flight Crew
Interface Branch, ANM-111, 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: Don Stimson at the above address,
telephone (206) 227-2143; facsimile (425) 227-1320; or e-mail at:
don.stimson@faa.gov.
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 25.21-1X, and submit comments, in
duplicate, to the address specified above. The Transport Standards
Staff will consider all communications received on or before the
closing date for comments before issuing the final AC. The 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.
Background
This proposed AC sets forth acceptable methods of compliance with
the provisions of 14 CFR 25.21 and related regulations dealing with the
certification requirements for performance and handling characteristics
of transport category airplanes affected by flight in icing conditions
defined in appendix C.
It is one means, but not the only means, of complying with the
revisions proposed in Notice No. 05-10 entitled ``Airplane Performance
and Handling Qualities in Icing Conditions,'' published in the Federal
Register on November 4, 2005 (70 FR 67278). Issuance of AC 25-21-1 is
contingent on final adoption of the proposed revisions to part 25.
Other methods of compliance with the requirements may be acceptable.
In addition, a separate Notice of availability of proposed
revisions to AC 25-7A, ``Flight Test Guide for Certification of
Transport Category Airplanes,'' will be published in the Federal
Register when issued. In that proposed AC, the FAA proposes
[[Page 75236]]
removing the icing-related guidance from AC 25-7A because that material
is addressed by the NPRM Notice No. 05-10, ``Airplane Performance and
Handling Qualities In Icing Conditions'' and proposed AC 25.21-1X,
``Performance And Handling Characteristics In The Icing Conditions
Specified In part 25, Appendix C.''
Since publication of that notice, the FAA has received a request
that the comment period for the notice be extended past its original
closing date of January 3, 2006, to allow more time in which to study
the proposal and to prepare comments on this very important issue.
Extension of Comment Period
The FAA has reviewed the request for consideration of an additional
amount of time to comment on proposed AC 25.21-1X, and has determined
that extending the comment period would be in the public interest and
that good cause exists for taking this action. Accordingly, the comment
period of Notice of availability of proposed AC 25.21-1X, and request
for comments, is extended until February 2, 2006.
Issued in Renton, Washington, on December 9, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate Aircraft Certification Service.
[FR Doc. 05-24157 Filed 12-16-05; 8:45 am]
BILLING CODE 4910-13-M