Special Conditions: Airbus, Model A350-900 Series Airplane; Ground Pivoting Loads, 64415-64417 [2013-25398]
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Federal Register / Vol. 78, No. 209 / Tuesday, October 29, 2013 / Proposed Rules
DOE will continue to accept
written comments on the SNOPR
published August 2, 2013 (78 FR 46829)
submitted electronically or postmarked
on or before November 29, 2013. The
second public meeting will be held on
November 15, 2013, from 9 a.m. to 12
p.m. at the Washington Grand Hyatt,
1000 H St. NW., Washington, DC 20001.
Due to space limitations, DOE asks that
interested persons send their requests to
attend this meeting, by no later than
4:30 p.m. on November 13, 2013.
ADDRESSES: Interested persons should
send their requests to attend the second
public meeting via email to
Part810.SNOPR@nnsa.doe.gov. DOE
will confirm its receipt of requests.
Comments may be submitted on the
SNOPR, identified by RIN 1994–AA02,
by any of the following methods:
1. Federal Rulemaking Portal: https://
www.regulations.gov/
#!docketDetail;D=DOE-HQ-2011-0035.
Follow the instructions for submitting
comments.
2. Email: Part810.SNOPR@hq.doe.gov.
Include RIN 1994–AA02 in the subject
line of the message.
3. Mail: Richard Goorevich, Senior
Policy Advisor, Office of
Nonproliferation and International
Security, NA–24, National Nuclear
Security Administration, Department of
Energy, 1000 Independence Avenue
SW., Washington, DC 20585.
Due to potential delays in DOE’s
receipt and processing of mail sent
through the U.S. Postal Service, DOE
encourages responders to submit
comments electronically to ensure
timely receipt.
All submissions must include the RIN
for this rulemaking, RIN 1994–AA02.
For additional information and
instructions on submitting comments,
see the ‘‘Public Comment Procedures’’
heading of the SUPPLEMENTARY
INFORMATION section of the SNOPR.
FOR FURTHER INFORMATION CONTACT:
Richard Goorevich, Senior Policy
Advisor, Office of Nonproliferation and
International Security, NA–24, National
Nuclear Security Administration,
Department of Energy, 1000
Independence Avenue SW.,
Washington, DC 20585, telephone 202–
586–0589; Janet Barsy, Office of the
General Counsel, GC–53, Department of
Energy, 1000 Independence Avenue
SW., Washington, DC 20585, telephone
202–586–3429; or Katie Strangis,
National Nuclear Security
Administration, 1000 Independence
Avenue SW., Washington, DC 20585,
telephone 202–586–8623.
SUPPLEMENTARY INFORMATION:
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DATES:
I. Background
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17:24 Oct 28, 2013
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II. Second Public Meeting
III. Extension of Comment Period
I. Background
On September 7, 2011, DOE issued a
notice of proposed rulemaking (NOPR)
to propose the first comprehensive
updating of regulations concerning
Assistance to Foreign Atomic Energy
Activities since 1986. (76 FR 55278) The
NOPR reflected a need to make the
regulations consistent with current
global civil nuclear trade practices and
nonproliferation norms, and to update
the activities and technologies subject to
the Secretary of Energy’s specific
authorization and DOE reporting
requirements. It also identified
destinations with respect to which most
assistance would be generally
authorized and destinations that would
require a specific authorization by the
Secretary of Energy. After careful
consideration of all comments received,
DOE published a SNOPR on August 2,
2013, to respond to those comments,
propose new or revised rule changes,
and afford interested parties a second
opportunity to comment. (78 FR 46829)
II. Second Public Meeting
A public meeting on the SNOPR was
held at the DOE Forrestal Building
located in Washington, DC, on August 5,
2013. A second public meeting on the
SNOPR will be held on November 15,
2013, from 9 a.m. to 12 p.m. at the
Washington Grand Hyatt, 1000 H St,
NW Washington, DC, 20001. Interested
persons should send their requests to
attend the second public meeting via
email to Part810.SNOPR@nnsa.doe.gov.
DOE will confirm its receipt of requests.
Persons interested in giving an oral
presentation at the second public
meeting should provide a daytime
phone number where the person can be
reached in the email requesting
attendance. Each oral presentation may
be limited and may in no instance be
longer than 20 minutes. Persons making
an oral presentation are requested to
provide 3 copies of their prepared
statement to the public meeting and
submit it at the registration desk. DOE
reserves the right to select the persons
who will speak. DOE also reserves the
right to schedule speakers’ presentations
and to establish the procedures for
conducting the meeting. A DOE official
will be designated to preside at the
meeting.
The meeting will not be a judicial or
evidentiary-type hearing. Any further
procedural rules for the conduct of the
meeting will be announced by the
presiding official. After the public
meeting, interested persons may submit
comments until the end of the comment
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64415
period. A transcript of the meeting will
be made, and the entire record of this
rulemaking will be retained by DOE and
posted at regulations.gov.
III. Extension of Comment Period
Due to the lapse in the fiscal year
2014 appropriation and associated
impacts on government operations, the
Department will extend the comment
period to November 29, 2013. The
extension will facilitate conducting the
second public meeting and afford
additional time for the public to review
and comment on the SNOPR.
As provided in the SNOPR, if you
submit information that you believe to
be exempt by law from public
disclosure, you should submit one
complete copy, as well as one copy from
which the information claimed to be
exempt by law from public disclosure
has been deleted. DOE is responsible for
the final determination with regard to
disclosure or nondisclosure of the
information and for treating it
accordingly under the DOE Freedom of
Information regulations at 10 CFR
1004.11.
Issued in Washington, DC, on October 23,
2013.
Richard Goorevich,
Senior Policy Advisor.
[FR Doc. 2013–25551 Filed 10–28–13; 8:45 am]
BILLING CODE 6450–01–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR part 25
[Docket No. FAA–2013–0890; Notice No. 25–
13–10–SC]
Special Conditions: Airbus, Model
A350–900 Series Airplane; Ground
Pivoting Loads
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed special
conditions.
AGENCY:
This action proposes special
conditions for Airbus Model A350–900
series airplanes. These airplanes will
have a novel or unusual design
feature(s) associated with a braking
system that affects the airplane’s
pivoting behavior. The applicable
airworthiness regulations do not contain
adequate or appropriate safety standards
for this design feature. These proposed
special conditions contain the
additional safety standards that the
Administrator considers necessary to
establish a level of safety equivalent to
SUMMARY:
E:\FR\FM\29OCP1.SGM
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64416
Federal Register / Vol. 78, No. 209 / Tuesday, October 29, 2013 / Proposed Rules
that established by the existing
airworthiness standards.
DATES: Send your comments on or
before December 13, 2013.
ADDRESSES: Send comments identified
by docket number FAA–2013–0890
using any of the following methods:
• Federal eRegulations Portal: Go to
https://www.regulations.gov/ and follow
the online instructions for sending your
comments electronically.
• Mail: Send comments to Docket
Operations, M–30, U.S. Department of
Transportation (DOT), 1200 New Jersey
Avenue SE., Room W12–140, West
Building Ground Floor, Washington, DC
20590–0001.
• Hand Delivery or Courier: Take
comments to Docket Operations in
Room W12–140 of the West Building
Ground Floor at 1200 New Jersey
Avenue SE., Washington, DC, between 9
a.m. and 5 p.m., Monday through
Friday, except federal holidays.
• Fax: Fax comments to Docket
Operations at 202–493–2251.
Privacy: The FAA will post all
comments it receives, without change,
to https://www.regulations.gov/,
including any personal information the
commenter provides. Using the search
function of the docket Web site, anyone
can find and read the electronic form of
all comments received into any FAA
docket, including the name of the
individual sending the comment (or
signing the comment for an association,
business, labor union, etc.). DOT’s
complete Privacy Act Statement can be
found in the Federal Register published
on April 11, 2000 (65 FR 19477–19478),
as well as at https://DocketsInfo.dot
.gov/.
Docket: Background documents or
comments received may be read at http:
//www.regulations.gov/ at any time.
Follow the online instructions for
accessing the docket or go to the Docket
Operations in Room W12–140 of the
West Building Ground Floor at 1200
New Jersey Avenue SE., Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except federal holidays.
FOR FURTHER INFORMATION CONTACT:
Todd Martin, FAA, Airframe/Cabin
Safety, ANM–115, Transport Airplane
Directorate, Aircraft Certification
Service, 1601 Lind Avenue SW.,
Renton, Washington, 98057–3356;
telephone (425) 227–1178; facsimile
(425) 227–1320.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite interested people to take
part in this rulemaking by sending
written comments, data, or views. The
most helpful comments reference a
VerDate Mar<15>2010
16:26 Oct 28, 2013
Jkt 232001
specific portion of the proposed special
conditions, explain the reason for any
recommended change, and include
supporting data. We ask that you send
us two copies of written comments.
We will consider all comments we
receive on or before the closing date for
comments. We may change these special
conditions based on the comments we
receive.
Background
On August 25, 2008, Airbus applied
for a type certificate for their new Model
A350–900 series airplane. Later, Airbus
requested and the FAA approved an
extension to the application for FAA
type certification to June 28, 2009. The
Model A350–900 series airplane has a
conventional layout with twin wingmounted Rolls-Royce Trent engines. It
features a twin aisle 9-abreast economy
class layout, and accommodates side-byside placement of LD–3 containers in
the cargo compartment. The basic
Model A350–900 series configuration
will accommodate 315 passengers in a
standard two-class arrangement. The
design cruise speed is Mach 0.85 with
a Maximum Take-Off Weight of 602,000
lbs. Airbus proposes the Model A350–
900 series airplane to be certified for
extended operations (ETOPS) beyond
180 minutes at entry into service for up
to a 420-minute maximum diversion
time.
The Airbus Model A350–900 series
airplane is equipped with a braking
system that affects the airplane’s
pivoting behavior. During pivoting the
braking system inhibits braking on some
wheels. Title 14 Code of Federal
Regulations (14 CFR) 25.503 and
European Aviation Safety Agency
(EASA) Certification Specification (CS)
section 25.503, each specify limit loads
due to pivoting, however, system effects
are not taken into account.
Type Certification Basis
Under Title 14, Code of Federal
Regulations (14 CFR) 21.17, Airbus must
show that the Model A350–900 series
meets the applicable provisions of 14
CFR part 25, as amended by
Amendments 25–1 through 25–128.
If the Administrator finds that the
applicable airworthiness regulations
(i.e., 14 CFR part 25) do not contain
adequate or appropriate safety standards
for the Model A350–900 series because
of a novel or unusual design feature,
special conditions are prescribed under
§ 21.16.
Special conditions are initially
applicable to the model for which they
are issued. Should the type certificate
for that model be amended later to
include any other model that
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Frm 00009
Fmt 4702
Sfmt 4702
incorporates the same or similar novel
or unusual design feature, the proposed
special conditions would also apply to
the other model under § 21.101.
In addition to the applicable
airworthiness regulations and proposed
special conditions, the Model A350–900
series must comply with the fuel vent
and exhaust emission requirements of
14 CFR part 34 and the noise
certification requirements of 14 CFR
part 36 and the FAA must issue a
finding of regulatory adequacy under
§ 611 of Public Law 92–574, the ‘‘Noise
Control Act of 1972.’’
The FAA issues special conditions, as
defined in 14 CFR 11.19, under § 11.38,
and they become part of the typecertification basis under § 21.17(a)(2).
Novel or Unusual Design Features
The Airbus Model A350–900 series
airplane will incorporate the following
novel or unusual design features: a
braking system that affects the airplane’s
pivoting behavior.
Discussion
Within the Aviation Rulemaking
Advisory Committee, the Loads and
Dynamics Harmonization Working
Group developed criteria for
determining pivoting loads. The group
recommended, for airplanes with more
than two main landing gear units, a
rational pivoting maneuver that takes
into account the effects of the braking
system and tire characteristics, in lieu of
the current requirement. Although the
Airbus Model A350–900 series airplane
has two main landing gear units, EASA
and the FAA propose to apply the same
criteria on this airplane.
Applicability
As discussed above, these proposed
special conditions apply to Airbus
Model A350–900 series airplanes.
Should Airbus apply later for a change
to the type certificate to include another
model incorporating the same novel or
unusual design feature, the proposed
special conditions would apply to that
model as well.
Conclusion
This action affects only certain novel
or unusual design features on the Airbus
Model A350–900 series airplanes. It is
not a rule of general applicability.
List of Subjects in 14 CFR part 25
Aircraft, Aviation safety, Reporting
and recordkeeping requirements.
The authority citation for these
special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701,
44702, 44704.
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Federal Register / Vol. 78, No. 209 / Tuesday, October 29, 2013 / Proposed Rules
The Proposed Special Conditions
Accordingly, the Federal Aviation
Administration (FAA) proposes the
following special conditions as part of
the type certification basis for Airbus
Model A350–900 series airplanes in lieu
of § 25.503:
1. The main landing gear and
supporting structure must be designed
for the loads induced by pivoting during
ground maneuvers.
(a) The following rational pivoting
maneuvers must be considered:
(i) Towing at the nose gear at the
critical towing angle with no brakes
applied, including cases with torque
links disconnected; and separately,
(ii) Application of symmetrical or
unsymmetrical forward thrust to aid
pivoting, with or without braking by
pilot action on the pedals.
(b) The airplane is assumed to be in
static equilibrium, with the loads being
applied at the ground contact points.
(c) The limit vertical load factor must
be 1.0, and:
(i) For wheels with brakes applied,
the coefficient of friction must be 0.8,
(ii) For wheels with brakes not
applied, the ground tire reactions must
be based on reliable tire data.
Issued in Renton, Washington, on
September 12, 2013.
Jeffrey E. Duven,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 2013–25398 Filed 10–28–13; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2013–0393; Directorate
Identifier 2012–CE–025–AD]
RIN 2120–AA64
Airworthiness Directives; Twin
Commander Aircraft LLC Airplanes;
Initial Regulatory Flexibility Analysis
Federal Aviation
Administration (FAA), DOT.
ACTION: Availability of an initial
regulatory flexibility analysis.
AGENCY:
This document announces the
availability of and request for comments
on the initial regulatory flexibility
analysis for the previously published
Airworthiness Directive (AD) 2013–09–
05 that applies to certain Twin
Commander Aircraft LLC Models 690,
690A, and 690B airplanes. AD 2013–09–
05 requires inspection for cracking of
the outer fuselage attachments, the
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SUMMARY:
VerDate Mar<15>2010
16:26 Oct 28, 2013
Jkt 232001
lower wing main spar, the vertical
channels, the upper picture window
channels, aft cabin pressure web,
external wing to fuselage fillets, and
fasteners; repair or replacement of
damaged parts as necessary; and
modification of the structure with
reinforced parts.
DATES: Comments must be received on
or before December 13, 2013.
ADDRESSES: You may send comments,
using the procedures found in 14 CFR
11.43 and 11.45, by any of the following
methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: 202–493–2251.
• Mail: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue SE.,
Washington, DC 20590.
• Hand Delivery: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue SE.,
Washington, DC 20590, between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays.
FOR FURTHER INFORMATION CONTACT:
Kathleen Arrigotti, Aerospace Engineer,
FAA, Seattle Aircraft Certification
Office (ACO), Airframe Branch, ANM–
120S, 1601 Lind Avenue SW., Renton,
WA 98057; telephone: (425) 917–6426;
fax: (425) 917–6590; email:
kathleen.arrigotti@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
We issued AD 2013–09–05;
Amendment 39–17446, which was
published in the Federal Register on
May 14, 2013 (78 FR 28125) (‘‘AD 2013–
09–05’’), to amend 14 CFR part 39 to
add an AD that would apply to the
specified products. AD 2013–09–05
requires inspection for cracking of the
outer fuselage attachments, the lower
wing main spar, the vertical channels,
the upper picture window channels, aft
cabin pressure web, external wing to
fuselage fillets, and fasteners; repair or
replacement of damaged parts as
necessary; and modification of the
structure with reinforced parts.
Reason for This Action
The Regulatory Flexibility Act of 1980
(Pub. L. 96–354) (RFA) establishes ‘‘as a
principle of regulatory issuance that
agencies shall endeavor, consistent with
the objectives of the rule and of
applicable statutes, to fit regulatory and
informational requirements to the scale
of the businesses, organizations, and
governmental jurisdictions subject to
PO 00000
Frm 00010
Fmt 4702
Sfmt 4702
64417
regulation.’’ To achieve this principle,
agencies are required to solicit and
consider flexible regulatory proposals
and to explain the rationale for their
actions to assure that such proposals are
given serious consideration. The RFA
covers a wide-range of small entities,
including small businesses, not-forprofit organizations, and small
governmental jurisdictions.
Agencies must perform a review to
determine whether a proposed or final
rule will have a significant economic
impact on a substantial number of small
entities. In accordance with Section 608
of the Regulatory Flexibility Act, an
agency head may waive or delay
completion of some or all of the
requirements of Section 603 by
providing a written finding that the final
rule is being promulgated in response to
an emergency that makes compliance or
timely compliance with the provisions
of Section 603 impracticable. The
agency issued AD 2013–09–05 in
response to an immediate safety of flight
condition that made compliance with
the provisions of Section 603
impracticable. After issuing AD 2013–
09–05, the agency reviewed the AD
actions and determined that the final
rule did have a significant economic
impact on a substantial number of small
entities. The following presents the
initial regulatory flexibility analysis
prepared by the agency as described in
the RFA.
1. Reason for Agency Action
We issued AD 2013–09–05 for certain
Twin Commander Aircraft LLC Models
690, 690A, and 690B airplanes. The AD
requires inspection for cracking of the
outer fuselage attachments, the lower
wing main spar, the vertical channels,
the upper picture window channels, aft
cabin pressure web, external wing to
fuselage fillets, and fasteners; repair or
replacement of damaged parts as
necessary; and modification of the
structure with reinforced parts. The AD
was prompted by cracks found in the
upper picture window frame channels,
left- and right-hand wing main spar
frame support channels, and aft
pressure bulkhead web. This condition,
if not corrected, could result in
structural failure of the airplane. We
issued the AD to correct the unsafe
condition on these products.
2. Legal Basis and Objectives of the
Final Rule
Title 49 of the United States Code
specifies the FAA’s authority to issue
rules on aviation safety. Subtitle I,
section 106, describes the authority of
the FAA Administrator. ‘‘Subtitle VII:
Aviation Programs’’ describes in more
E:\FR\FM\29OCP1.SGM
29OCP1
Agencies
[Federal Register Volume 78, Number 209 (Tuesday, October 29, 2013)]
[Proposed Rules]
[Pages 64415-64417]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-25398]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR part 25
[Docket No. FAA-2013-0890; Notice No. 25-13-10-SC]
Special Conditions: Airbus, Model A350-900 Series Airplane;
Ground Pivoting Loads
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed special conditions.
-----------------------------------------------------------------------
SUMMARY: This action proposes special conditions for Airbus Model A350-
900 series airplanes. These airplanes will have a novel or unusual
design feature(s) associated with a braking system that affects the
airplane's pivoting behavior. The applicable airworthiness regulations
do not contain adequate or appropriate safety standards for this design
feature. These proposed special conditions contain the additional
safety standards that the Administrator considers necessary to
establish a level of safety equivalent to
[[Page 64416]]
that established by the existing airworthiness standards.
DATES: Send your comments on or before December 13, 2013.
ADDRESSES: Send comments identified by docket number FAA-2013-0890
using any of the following methods:
Federal eRegulations Portal: Go to https://www.regulations.gov/ and follow the online instructions for sending
your comments electronically.
Mail: Send comments to Docket Operations, M-30, U.S.
Department of Transportation (DOT), 1200 New Jersey Avenue SE., Room
W12-140, West Building Ground Floor, Washington, DC 20590-0001.
Hand Delivery or Courier: Take comments to Docket
Operations in Room W12-140 of the West Building Ground Floor at 1200
New Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m.,
Monday through Friday, except federal holidays.
Fax: Fax comments to Docket Operations at 202-493-2251.
Privacy: The FAA will post all comments it receives, without
change, to https://www.regulations.gov/, including any personal
information the commenter provides. Using the search function of the
docket Web site, anyone can find and read the electronic form of all
comments received into any FAA docket, including the name of the
individual sending the comment (or signing the comment for an
association, business, labor union, etc.). DOT's complete Privacy Act
Statement can be found in the Federal Register published on April 11,
2000 (65 FR 19477-19478), as well as at https://DocketsInfo.dot .gov/.
Docket: Background documents or comments received may be read at
https://www.regulations.gov/ at any time. Follow the online
instructions for accessing the docket or go to the Docket Operations in
Room W12-140 of the West Building Ground Floor at 1200 New Jersey
Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through
Friday, except federal holidays.
FOR FURTHER INFORMATION CONTACT: Todd Martin, FAA, Airframe/Cabin
Safety, ANM-115, Transport Airplane Directorate, Aircraft Certification
Service, 1601 Lind Avenue SW., Renton, Washington, 98057-3356;
telephone (425) 227-1178; facsimile (425) 227-1320.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite interested people to take part in this rulemaking by
sending written comments, data, or views. The most helpful comments
reference a specific portion of the proposed special conditions,
explain the reason for any recommended change, and include supporting
data. We ask that you send us two copies of written comments.
We will consider all comments we receive on or before the closing
date for comments. We may change these special conditions based on the
comments we receive.
Background
On August 25, 2008, Airbus applied for a type certificate for their
new Model A350-900 series airplane. Later, Airbus requested and the FAA
approved an extension to the application for FAA type certification to
June 28, 2009. The Model A350-900 series airplane has a conventional
layout with twin wing-mounted Rolls-Royce Trent engines. It features a
twin aisle 9-abreast economy class layout, and accommodates side-by-
side placement of LD-3 containers in the cargo compartment. The basic
Model A350-900 series configuration will accommodate 315 passengers in
a standard two-class arrangement. The design cruise speed is Mach 0.85
with a Maximum Take-Off Weight of 602,000 lbs. Airbus proposes the
Model A350-900 series airplane to be certified for extended operations
(ETOPS) beyond 180 minutes at entry into service for up to a 420-minute
maximum diversion time.
The Airbus Model A350-900 series airplane is equipped with a
braking system that affects the airplane's pivoting behavior. During
pivoting the braking system inhibits braking on some wheels. Title 14
Code of Federal Regulations (14 CFR) 25.503 and European Aviation
Safety Agency (EASA) Certification Specification (CS) section 25.503,
each specify limit loads due to pivoting, however, system effects are
not taken into account.
Type Certification Basis
Under Title 14, Code of Federal Regulations (14 CFR) 21.17, Airbus
must show that the Model A350-900 series meets the applicable
provisions of 14 CFR part 25, as amended by Amendments 25-1 through 25-
128.
If the Administrator finds that the applicable airworthiness
regulations (i.e., 14 CFR part 25) do not contain adequate or
appropriate safety standards for the Model A350-900 series because of a
novel or unusual design feature, special conditions are prescribed
under Sec. 21.16.
Special conditions are initially applicable to the model for which
they are issued. Should the type certificate for that model be amended
later to include any other model that incorporates the same or similar
novel or unusual design feature, the proposed special conditions would
also apply to the other model under Sec. 21.101.
In addition to the applicable airworthiness regulations and
proposed special conditions, the Model A350-900 series must comply with
the fuel vent and exhaust emission requirements of 14 CFR part 34 and
the noise certification requirements of 14 CFR part 36 and the FAA must
issue a finding of regulatory adequacy under Sec. 611 of Public Law
92-574, the ``Noise Control Act of 1972.''
The FAA issues special conditions, as defined in 14 CFR 11.19,
under Sec. 11.38, and they become part of the type-certification basis
under Sec. 21.17(a)(2).
Novel or Unusual Design Features
The Airbus Model A350-900 series airplane will incorporate the
following novel or unusual design features: a braking system that
affects the airplane's pivoting behavior.
Discussion
Within the Aviation Rulemaking Advisory Committee, the Loads and
Dynamics Harmonization Working Group developed criteria for determining
pivoting loads. The group recommended, for airplanes with more than two
main landing gear units, a rational pivoting maneuver that takes into
account the effects of the braking system and tire characteristics, in
lieu of the current requirement. Although the Airbus Model A350-900
series airplane has two main landing gear units, EASA and the FAA
propose to apply the same criteria on this airplane.
Applicability
As discussed above, these proposed special conditions apply to
Airbus Model A350-900 series airplanes. Should Airbus apply later for a
change to the type certificate to include another model incorporating
the same novel or unusual design feature, the proposed special
conditions would apply to that model as well.
Conclusion
This action affects only certain novel or unusual design features
on the Airbus Model A350-900 series airplanes. It is not a rule of
general applicability.
List of Subjects in 14 CFR part 25
Aircraft, Aviation safety, Reporting and recordkeeping
requirements.
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.
[[Page 64417]]
The Proposed Special Conditions
Accordingly, the Federal Aviation Administration (FAA) proposes the
following special conditions as part of the type certification basis
for Airbus Model A350-900 series airplanes in lieu of Sec. 25.503:
1. The main landing gear and supporting structure must be designed
for the loads induced by pivoting during ground maneuvers.
(a) The following rational pivoting maneuvers must be considered:
(i) Towing at the nose gear at the critical towing angle with no
brakes applied, including cases with torque links disconnected; and
separately,
(ii) Application of symmetrical or unsymmetrical forward thrust to
aid pivoting, with or without braking by pilot action on the pedals.
(b) The airplane is assumed to be in static equilibrium, with the
loads being applied at the ground contact points.
(c) The limit vertical load factor must be 1.0, and:
(i) For wheels with brakes applied, the coefficient of friction
must be 0.8,
(ii) For wheels with brakes not applied, the ground tire reactions
must be based on reliable tire data.
Issued in Renton, Washington, on September 12, 2013.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2013-25398 Filed 10-28-13; 8:45 am]
BILLING CODE 4910-13-P