[Federal Register: December 19, 2005 (Volume 70, Number 242)]
[Notices]
[Page 75234-75235]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr19de05-96]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Revisions to Advisory Circular 25-7A, Flight Test Guide
for Certification of Transport Category Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed advisory circular and request for comments.
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SUMMARY: This notice requests comments regarding proposed revisions to
Advisory Circular (AC) 25-7A, ``Flight Test Guide for Certification of
Transport Category Airplanes.'' Advisory Circular 25-7A provides
guidance on acceptable means, but not the only means, of demonstrating
compliance with the airworthiness standards for transport category
airplanes. The proposed revisions would remove the guidance material
associated with certification for flight in icing conditions. This
material is addressed in NPRM No. 05-10, ``Airplane Performance and
Handling Qualities In Icing Conditions'' and the guidance material
proposed in AC 25.21-1, ``Performance And Handling Characteristics In
The Icing Conditions Specified In Part 25, Appendix C.'' This notice
provides interested persons an opportunity to comment on the proposed
revisions to AC 25-7A.
DATES: Your comments must be received on or before February 2, 2006.
ADDRESSES: You should send your comments to the Federal Aviation
Administration, Attention: Don Stimson, Airplane & Flight Crew
Interface Branch, ANM-111, Transport Airplane Directorate, Aircraft
Certification Service, 1601 Lind Ave., SW., Renton, WA 98055-4056. You
may also fax your comments to 425-227-1149, or you may send your
comments electronically to: don.stimson@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: Don Stimson, Airplane & Flight Crew
Interface Branch, ANM-111, at the above address, telephone 425-227-
1129, facsimile 425-227-1149, or by e-mail at don.stimson@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
You are invited to comment on the proposed revisions to AC 25-7A by
submitting written comments, data, or views. You must identify the AC
title and submit your comments in duplicate
[[Page 75235]]
to the address specified above. We will consider all comments received
on or before the closing date for comments before issuing the revision
to AC 25-7A. You may obtain an electronic copy of the proposed AC 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 Don Stimson at the address, phone number, or e-mail address
listed above.
Discussion
Since AC 25-7A only provides one acceptable means of compliance
with the regulatory standard, applicants will continue to have the
option of proposing the use of another means of compliance.
Proposed Revisions to AC 25-7A
The revisions proposed in this notice address guidance material
that is now covered in NPRM No. 05-10, ``Airplane Performance and
Handling Qualities In Icing Conditions'' and proposed AC 25.21-1,
``Performance And Handling Characteristics In The Icing Conditions
Specified In Part 25, Appendix C.'' The FAA proposes removing this
material from AC 25-7A.
1. Remove the following paragraphs:
Paragraphs 20a(3), 20e, 29d(2)(viii), 31b(2)(ii), 231, and 232.
2. Renumber the following paragraphs:
Renumber existing paragraph 20a(4) as 20(a)(3).
Renumber existing paragraph 20f as 20e.
Renumber existing paragraph 29d(2)(ix) and (x) as 29d(2)(viii) and
(ix), respectively.
Renumber existing paragraph 233 through 242 as 231 through 240,
respectively.
3. Revise the paragraphs referenced in renumbered paragraph
20e(2)(iii)(C) from 20f(2)(iii)(A) and (B) to 20e(2)(iii)(A) and (B),
respectively, to read as follows:
(C) In flight tests to satisfy paragraphs 20e(2)(iii)(A) and (B)
the load factor should be increased until either: * * *
4. Revise existing paragraph 31b(2)(i) and (ii) by moving the text
of paragraph (i) into paragraph b(2), and removing paragraph (i) and
(ii) to read as folllows:
(2) Section 25.251(b). The airplane should be flown at
VDF/MDF at several altitudes from the highest
practicable cruise altitude to the lowest practicable altitude. The
test should be flown starting from trimmed flight at VMO/
MMO at a thrust setting not exceeding maximum continuous
power. The airplane gross weight should be as high as practicable for
the cruise condition, with the c.g., at or near the forward limit. High
drag devices should also be deployed at VDF/MDF
(spoilers and speed brakes); thrust reversers, if designed for inflight
deployment, should be deployed at their limit speed conditions.
5. Revise paragraph 15a by removing the last two sentences of
paragraph 15a to read as follows:
15. CLIMB: GENERAL--Sec. 25.117
a. Explanation. This section states the climb requirements of
Sec. Sec. 25.119 and 25.121 must be complied with at each weight,
altitude, and ambient temperature within the operational limits
established for the airplane and with the most unfavorable center of
gravity for each configuration.
6. Revise the Table of Contents to reflect the paragraph and page
number changes above.
Issued in Renton, Washington, on December 9, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-24156 Filed 12-16-05; 8:45 am]
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