[Federal Register Volume 63, Number 32 (Wednesday, February 18, 1998)]
[Notices]
[Page 8322]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-3899]
Federal Register / Vol. 63, No. 32 / Wednesday, February 18, 1998 /
Notices
[[Page 8322]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Proposed Revisions to Advisory Circular--Flight Test Guide for
Certification of Transport Category Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed advisory circular revisions and request for
comments.
-----------------------------------------------------------------------
SUMMARY: This notice announces the availability of and request comments
regarding proposed revisions to Advisory Circular (AC) 25-7, ``Flight
Test Guide for Certification of Transport Category Airplanes.''
Advisory Circular 25-7 provides guidance on acceptable means, but not
the only means, of demonstrating compliance with the airworthiness
standards for transport category airplanes. The proposed revisions to
AC 25-7 complement the revisions to the airworthiness standards adopted
by the final rule, ``Improved Standards for Determining Rejected
Takeoff and Landing Performance,'' located elsewhere in this issue of
the Federal Register. This notice provides interested persons an
opportunity to comment on the proposed revisions to the AC.
DATES: Comments must be received on or before May 19, 1998.
ADDRESSES: Send all comments on the proposed AC revisions to the
Federal Aviation Administration, Attention: Don Stimson, Airplane and
Flightcrew Interface Branch, ANM-111, Transport Airplane Directorate,
Aircraft Certification Service, 1601 Lind Ave SW., Renton, WA 98055-
4056. Comments may be examined at the above address between 7:30 a.m.
and 4:00 p.m. weekdays, except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Katherine Burks, Regulations Branch,
ANM-114, at the above address, telephone (425) 227-2114, facsimile
(425) 227-1320.
SUPPLEMENTARY INFORMATION:
Comment Invited
A copy of the subject AC may be obtained by contacting the person
named above under FOR FURTHER INFORMATION CONTACT. Interested persons
are invited to comment on the proposed revisions to the AC by
submitting such written data, views, or arguments as they may desire.
Commenters must identify the title of the AC and submit comments in
duplicate to the address specified above. All comments received on or
before the closing date for comments will be considered by the
Transport Standards Staff before issuing the final revised AC.
Discussion
The final rule, ``Improved Standards for Determining Rejected
Takeoff and Landing Performance,'' is published elsewhere in this issue
of the Federal Register. In that final rule, the Federal Aviation
Administration (FAA) amended the airworthiness standards for transport
category airplanes to: (1) Revise the method for taking into account
the time needed for the pilot to accomplish the procedures for rejected
takeoff; (2) require that takeoff performance be determined for wet
runways; and (3) require that rejected takeoff and landing stopping
distances be based on worn brakes. The FAA took this action to improve
the airworthiness standards, reduce the impact of the standards on the
competitiveness of new versus derivative airplanes without adversely
affecting safety, and harmonize with revised standards of the European
Joint Aviation Requirements-25 (JAR-25).
The FAA recognizes that extensive guidance material will be
necessary to assist applicants in complying with the revised standards
promulgated by the final rule. Therefore, the FAA proposes revising AC
25-7 to be consistent with the revised standards and to add new
material regarding an acceptable means of complying with the wet runway
and worn brake requirements. The added material includes detailed
guidance for:
a. Using reverse thrust in determining wet runway accelerate-stop
distances;
b. Classifying the types of anti-skid systems;
c. Verifying the type of anti-skid system installed on the airplane
and that it is properly tuned for operation on wet and slippery
runways;
d. Determining the anti-skid efficiency on a wet runway;
e. Developing an analytical model of wet runway braking
performance; and
f. Acceptable means for demonstrating braking performance and
energy capacity in the fully worn condition.
This proposed revision to AC 25-7 should not be confused with the
more extensive AC 25-7 revision proposed by the FAA and made available
through notice in the Federal Register on April 3, 1996 (61 FR 14847).
Commenters should consider the revisions accompanying this notice
independently, with the exception of paragraph 55, which does not
appear in the original AC 25-7 and is revised from the notice published
on April 3. Depending on the comments received and the time needed to
review them and incorporate any changes to the proposed material, the
FAA may either combine the two proposals into one revision of AC 25-7,
or issue two separate revisions. Issued in Renton, Washington, on
January 15, 1998.
Ronald T. Wojnar,
Manager, Transport Airplane Directorate, Aircraft Certification
Service, ANM-100.
[FR Doc. 98-3899 Filed 2-17-98; 8:45 am]
BILLING CODE 4910-13-M
