Airworthiness Directives; Rolls-Royce Corporation AE 3007A1E and AE 1107C Turbofan/Turboshaft Engines, 33025-33027 [E8-13056]
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33025
Proposed Rules
Federal Register
Vol. 73, No. 113
Wednesday, June 11, 2008
This section of the FEDERAL REGISTER
contains notices to the public of the proposed
issuance of rules and regulations. The
purpose of these notices is to give interested
persons an opportunity to participate in the
rule making prior to the adoption of the final
rules.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2008–0230; Directorate
Identifier 2007–NE–24–AD]
RIN 2120–AA64
Airworthiness Directives; Rolls-Royce
Corporation AE 3007A1E and AE
1107C Turbofan/Turboshaft Engines
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
Rolls-Royce Corporation (RRC) AE
3007A1E and AE 1107C turbofan/
turboshaft engines. This proposed AD
would require removal from service of
certain 2nd stage, 3rd stage, and 4th
stage compressor wheels, compressor
cone shaft assemblies, and 1st to 2ndstage turbine spacers, at new, reduced,
published life limits. This proposed AD
results from RRC applying an updated
lifing methodology to the affected parts.
We are proposing this AD to prevent
low-cycle-fatigue (LCF) failure of the
parts listed in Table 1 of this proposed
AD, which could result in an
uncontained engine failure and damage
to the aircraft.
DATES: We must receive any comments
on this proposed AD by August 11,
2008.
Use one of the following
addresses to comment on this proposed
AD.
• Federal eRulemaking Portal: Go to
https://www.regulations.gov and follow
the instructions for sending your
comments electronically.
• Mail: Docket Management Facility,
U.S. Department of Transportation, 1200
New Jersey Avenue, SE., West Building
Ground Floor, Room W12–140,
Washington, DC 20590–0001.
sroberts on PROD1PC70 with PROPOSALS
ADDRESSES:
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18:12 Jun 10, 2008
Jkt 214001
• Hand Delivery: Deliver to Mail
address above between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
• Fax: (202) 493–2251.
You can get the service information
identified in this proposed AD from
Rolls-Royce Corporation, P.O. Box 420,
Indianapolis, IN 46206; e-mail:
indy.pubs.services@rolls-royce.com;
telephone (317) 230–3774; fax (317)
230–8084.
FOR FURTHER INFORMATION CONTACT:
Michael Downs, Aerospace Engineer,
Chicago Aircraft Certification Office,
Small Airplane Directorate, FAA, 2300
E. Devon Ave., Des Plaines, IL 60018;
telephone (847) 294–7870; fax (847)
294–7834.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send us any written
relevant data, views, or arguments
regarding this proposal. Send your
comments to an address listed under
ADDRESSES. Include ‘‘Docket No. FAA–
2008–0230; Directorate Identifier 2007–
NE–24–AD’’ in the subject line of your
comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of the proposed AD. We will
consider all comments received by the
closing date and may amend the
proposed AD in light of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact with FAA
personnel concerning this proposed AD.
Using the search function of the Web
site, anyone can find and read the
comments in any of our dockets,
including, if provided, the name of the
individual who sent the comment (or
signed the comment on behalf of an
association, business, labor union, etc.).
You may review the DOT’s complete
Privacy Act Statement in the Federal
Register published on April 11, 2000
(65 FR 19477–78).
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Operations office between 9 a.m.
and 5 p.m., Monday through Friday,
PO 00000
Frm 00001
Fmt 4702
Sfmt 4702
except Federal holidays. The AD docket
contains this proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Operations
office (telephone (800) 647–5527) is the
same as the Mail address provided in
the ADDRESSES section. Comments will
be available in the AD docket shortly
after receipt.
Discussion
RRC was seeking to increase the LCF
lives of the compressor wheels used in
AE 3007A1E and AE 1107C turbofan/
turboshaft engines, by applying an
updated lifing methodology. However,
their engine testing and evaluation
revealed that some of the compressor
wheels experienced crack initiation in
the dovetail slots. RRC found that these
parts were likely to fail within their
published lives, and that that failure
presented an unacceptable compromise
to safety. As a result, RRC decreased the
published life limits of the compressor
wheels, and also recalculated and
decreased the published life of certain
compressor cone shaft assemblies and
1st-to-2nd stage turbine spacers. We
reviewed RRC’s testing results and
reached the same conclusion. These
conditions, if not corrected, could lead
to LCF failure of the parts listed in Table
1 of this proposed AD, which could
result in an uncontained engine failure
and damage to the aircraft.
FAA’s Determination and Requirements
of the Proposed AD
We have evaluated all pertinent
information and identified an unsafe
condition that is likely to exist or
develop on other products of this same
type design. We are proposing this AD,
which would require removal from
service of the parts listed in Table 1 of
this proposed AD, at new, reduced,
published life limits.
Costs of Compliance
We estimate that this proposed AD
would affect 220 AE 3007A1E turbofan
engines installed on aircraft of U.S.
registry. The proposed action does not
impose any additional labor costs since
it will be performed at engine overhaul.
Required parts would cost about
$100,000 per engine. Based on these
figures, we estimate the total cost of the
proposed AD to U.S. operators to be
$22,000,000.
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11JNP1
33026
Federal Register / Vol. 73, No. 113 / Wednesday, June 11, 2008 / Proposed Rules
Authority for This Rulemaking
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
detail the scope of the Agency’s
authority.
We are issuing this rulemaking under
the authority described in Subtitle VII,
Part A, Subpart III, Section 44701,
‘‘General requirements.’’ Under that
section, Congress charges the FAA with
promoting safe flight of civil aircraft in
air commerce by prescribing regulations
for practices, methods, and procedures
the Administrator finds necessary for
safety in air commerce. This regulation
is within the scope of that authority
because it addresses an unsafe condition
that is likely to exist or develop on
products identified in this rulemaking
action.
Regulatory Findings
We have determined that this
proposed AD would not have federalism
implications under Executive Order
13132. This proposed AD would not
have a substantial direct effect on the
States, on the relationship between the
national Government and the States, or
on the distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify that the proposed AD:
1. Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
2. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); and
3. Would not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
We prepared a regulatory evaluation
of the estimated costs to comply with
this proposed AD. You may get a copy
of this summary at the address listed
under ADDRESSES.
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive:
Rolls-Royce Corporation (Formerly Allison
Engine Company, Inc.): Docket No.
FAA–2008–0230; Directorate Identifier
2007–NE–24–AD.
Comments Due Date
(a) The Federal Aviation Administration
(FAA) must receive comments on this
airworthiness directive (AD) action by
August 11, 2008.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Safety.
Affected ADs
The Proposed Amendment
Under the authority delegated to me
by the Administrator, the Federal
Aviation Administration proposes to
amend 14 CFR part 39 as follows:
(c) This AD applies to Rolls-Royce
Corporation (RRC) AE 3007A1E and AE
1107C turbofan/turboshaft engines, with the
following parts in Table 1 installed, as
applicable:
(b) None.
Applicability
TABLE 1.—AFFECTED PARTS AND REDUCED LIFE LIMITS
Engine
Part name
AE 3007A1E ....................................
2nd Stage Compressor Wheel ..................................................................
3rd Stage Compressor Wheel ...................................................................
2nd Stage Compressor Wheel ..................................................................
2nd Stage Compressor Wheel ..................................................................
3rd Stage Compressor Wheel ...................................................................
3rd Stage Compressor Wheel (serial numbers L72422, L72475,
L72505, L130704, L130829, L130830, L138218, L138226, L138621,
L206084, L206163).
3rd Stage Compressor Wheel ...................................................................
4th Stage Compressor Wheel ...................................................................
4th Stage Compressor Wheel ...................................................................
4th Stage Compressor Wheel ...................................................................
Compressor Cone Shaft Assembly ...........................................................
Compressor Cone Shaft Assembly ...........................................................
1st to 2nd-Stage Turbine Spacer ..............................................................
AE 1107C ........................................
AE 3007A1E turbofan engines are installed
on, but not limited to, EMBRAER EMB–135BJ
and EMB–145XR airplanes. AE 1107C
turboshaft engines are U.S. type-certificated
and are installed on, but not limited to,
certain U.S. military aircraft.
sroberts on PROD1PC70 with PROPOSALS
Unsafe Condition
(d) This AD results from RRC applying an
updated lifing methodology to the affected
parts. We are issuing this AD to prevent lowcycle-fatigue failure of the parts listed in
Table 1 of this AD, which could result in an
uncontained engine failure and damage to
the aircraft.
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18:12 Jun 10, 2008
Jkt 214001
Part No.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
5 days after the effective date of this AD,
unless the actions have already been done.
(f) Remove from service the parts listed in
Table 1 of this AD, at the new, reduced,
published life limits specified in Table 1 of
this AD.
Alternative Methods of Compliance
(g) The Manager, Chicago Aircraft
Certification Office, has the authority to
approve alternative methods of compliance
for this AD if requested using the procedures
found in 14 CFR 39.19.
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Frm 00002
Fmt 4702
Sfmt 4702
New reduced
published life
limit, in flight
cycles
23050752
23065303
23050752
23084157
23065303
23065303
15,200
13,300
11,400
11,400
6,200
5,000
23084158
23050754
23071259
23084159
23050728
23070729
23065300
6,200
14,900
14,900
14,900
2,900
2,900
9,500
Related Information
(h) RRC Alert Service Bulletin (ASB) No.
AE 3007A–A–72–346, dated May 1, 2007;
Service Bulletin No. AE 1107C–A–72–086,
Revision 2, dated January 28, 2008; and ASB
No. AE 1107C–A–72–089, dated January 28,
2008, also pertain to the subject of this AD.
(i) Contact Michael Downs, Aerospace
Engineer, Chicago Aircraft Certification
Office, Small Airplane Directorate, FAA,
2300 E. Devon Ave., Des Plaines, IL 60018;
telephone (847) 294–7870; fax (847) 294–
7834, for more information about this AD.
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11JNP1
Federal Register / Vol. 73, No. 113 / Wednesday, June 11, 2008 / Proposed Rules
Issued in Burlington, Massachusetts, on
June 5, 2008.
Robert G. Mann,
Acting Manager, Engine and Propeller
Directorate, Aircraft Certification Service.
[FR Doc. E8–13056 Filed 6–10–08; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
Food and Drug Administration
21 CFR Part 15
[Docket Nos. FDA–2005–P–0196 and FDA–
2007–0545] (formerly Docket No. 2005P–
0450)
Salt and Sodium; Petition to Revise the
Regulatory Status of Salt andEstablish
Food Labeling Requirements
Regarding Salt and Sodium; Public
Hearing; Reopening of the Comment
Period
AGENCY:
Food and Drug Administration,
HHS.
Notice of public hearing;
reopening of the comment period.
ACTION:
The Food and Drug
Administration (FDA) is reopening until
August 11, 2008, the comment period
for the notice of public hearing,
published in the Federal Register of
October 23, 2007 (72 FR 59973),
requesting comments regarding FDA’s
current framework of policies regarding
salt and sodium and potential future
approaches, including approaches
described in a citizen petition. The
agency is taking this action in response
to a request for an extension to allow
interested persons additional time to
submit comments. FDA is also
reopening the comment period to
update comments and to receive any
new information.
DATES: Submit written or electronic
comments by August 11, 2008. The
administrative record of the hearing will
remain open until August 11, 2008.
ADDRESSES: You may submit comments,
identified by Docket Nos. FDA–2005–P–
0196 and FDA–2007–0545 (formerly
Docket No. 2005P–0450), by any of the
following methods:
Electronic Submissions
Submit electronic comments in the
following way:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the
instructions for submitting comments.
sroberts on PROD1PC70 with PROPOSALS
SUMMARY:
VerDate Aug<31>2005
18:12 Jun 10, 2008
Jkt 214001
Written Submissions
Submit written submissions in the
following ways:
• FAX: 301–827–6870.
• Mail/Hand delivery/Courier [For
paper, disk, or CD–ROM submissions]:
Division of Dockets Management (HFA–
305), Food and Drug Administration,
5630 Fishers Lane, rm. 1061, Rockville,
MD 20852.
To ensure more timely processing of
comments, FDA is no longer accepting
comments submitted to the agency by email. FDA encourages you to continue
to submit electronic comments by using
the Federal eRulemaking Portal, as
described previously, in the ADDRESSES
portion of this document under
Electronic Submissions.
Instructions: All submissions received
must include the agency name and
Docket No(s). for this rulemaking. All
comments received may be posted
without change to https://
www.regulations.gov, including any
personal information provided. For
additional information on submitting
comments, see the ‘‘Comments’’ heading
of the SUPPLEMENTARY INFORMATION
section of this document.
Docket: For access to the docket to
read background documents or
comments received, go to https://
www.regulations.gov and insert the
docket number(s), found in brackets in
the heading of this document, into the
‘‘Search’’ box and follow the prompts
and/or go to the Division of Dockets
Management, 5630 Fishers Lane, rm.
1061, Rockville, MD 20852.
FOR FURTHER INFORMATION CONTACT:
Juanita Yates, Center for Food Safety
and Applied Nutrition (HFS–555), Food
and Drug Administration, 5100 Paint
Branch Pkwy., College Park, MD 20740,
301–436–1731, FAX: 301–436–2964.
SUPPLEMENTARY INFORMATION:
I. Background
In the Federal Register of October 23,
2007 (72 FR 59973), FDA published a
notice of public hearing requesting
comments on FDA’s current regulatory
framework of policies regarding salt and
sodium and future approaches,
including approaches described in a
citizen petition submitted by the Center
for Science in the Public Interest.
Specifically, FDA sought comments on
the issues and questions presented in
section III of the notice. (See 72 FR
59973 at 59976.)
Interested persons were originally
given until March 28, 2008, to comment
on issues related to salt and sodium.
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Fmt 4702
Sfmt 4702
33027
II. Request for Comments
Following publication of the October
30, 2007, notice of public hearing, FDA
received a request for a 60-day
extension of the comment period. The
request conveyed concern that the FDA
Division of Dockets Management Web
site transition to the Federal Docket
Management System (FDMS) on January
15, 2008, delayed the public
presentation of relevant material in the
docket and thus did not allow sufficient
time to develop a meaningful or
thoughtful response to the request for
comments on the issues and questions
presented in section III of the notice.
FDA has considered the request and
is reopening the comment period for the
notice of public hearing, for 60 days,
until August 11, 2008. The agency
believes that reopening the comment
period for 60 days allows adequate time
for interested persons to submit
comments on the issues and questions
presented in section III of the notice
without significantly delaying the
agency’s consideration of issues related
to salt and sodium.
III. How to Submit Comments
Interested persons may submit to the
Division of Dockets Management (see
ADDRESSES) written or electronic
comments regarding this document.
Submit a single copy of electronic
comments to https://www.regulations.gov
or two paper copies of any mailed
comments, except that individuals may
submit one paper copy. Comments are
to be identified with the docket number
found in brackets in the heading of this
document. Received comments may be
seen in the Division of Dockets
Management between 9 a.m. and 4 p.m.,
Monday through Friday.
Please note that on January 15, 2008,
the FDA Division of Dockets
Management Web site transitioned to
the Federal Dockets Management
System (FDMS). FDMS is a
Government-wide, electronic docket
management system. Electronic
comments or submissions will be
accepted by FDA only through FDMS at
https://www.regulations.gov.
Dated: June 3, 2008.
Jeffrey Shuren,
Associate Commissioner for Policy and
Planning.
[FR Doc. E8–13122 Filed 6–10–08; 8:45 am]
BILLING CODE 4160–01–S
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]]>Agencies
[Federal Register Volume 73, Number 113 (Wednesday, June 11, 2008)]
[Proposed Rules]
[Pages 33025-33027]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-13056]
========================================================================
Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
========================================================================
Federal Register / Vol. 73, No. 113 / Wednesday, June 11, 2008 /
Proposed Rules
[[Page 33025]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-0230; Directorate Identifier 2007-NE-24-AD]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Corporation AE 3007A1E and
AE 1107C Turbofan/Turboshaft Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for Rolls-Royce Corporation (RRC) AE 3007A1E and AE 1107C turbofan/
turboshaft engines. This proposed AD would require removal from service
of certain 2nd stage, 3rd stage, and 4th stage compressor wheels,
compressor cone shaft assemblies, and 1st to 2nd-stage turbine spacers,
at new, reduced, published life limits. This proposed AD results from
RRC applying an updated lifing methodology to the affected parts. We
are proposing this AD to prevent low-cycle-fatigue (LCF) failure of the
parts listed in Table 1 of this proposed AD, which could result in an
uncontained engine failure and damage to the aircraft.
DATES: We must receive any comments on this proposed AD by August 11,
2008.
ADDRESSES: Use one of the following addresses to comment on this
proposed AD.
Federal eRulemaking Portal: Go to https://
www.regulations.gov and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility, U.S. Department of
Transportation, 1200 New Jersey Avenue, SE., West Building Ground
Floor, Room W12-140, Washington, DC 20590-0001.
Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Fax: (202) 493-2251.
You can get the service information identified in this proposed AD
from Rolls-Royce Corporation, P.O. Box 420, Indianapolis, IN 46206; e-
mail: indy.pubs.services@rolls-royce.com; telephone (317) 230-3774; fax
(317) 230-8084.
FOR FURTHER INFORMATION CONTACT: Michael Downs, Aerospace Engineer,
Chicago Aircraft Certification Office, Small Airplane Directorate, FAA,
2300 E. Devon Ave., Des Plaines, IL 60018; telephone (847) 294-7870;
fax (847) 294-7834.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send us any written relevant data, views, or
arguments regarding this proposal. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2008-0230; Directorate
Identifier 2007-NE-24-AD'' in the subject line of your comments. We
specifically invite comments on the overall regulatory, economic,
environmental, and energy aspects of the proposed AD. We will consider
all comments received by the closing date and may amend the proposed AD
in light of those comments.
We will post all comments we receive, without change, to https://
www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact
with FAA personnel concerning this proposed AD. Using the search
function of the Web site, anyone can find and read the comments in any
of our dockets, including, if provided, the name of the individual who
sent the comment (or signed the comment on behalf of an association,
business, labor union, etc.). You may review the DOT's complete Privacy
Act Statement in the Federal Register published on April 11, 2000 (65
FR 19477-78).
Examining the AD Docket
You may examine the AD docket on the Internet at https://
www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Operations office (telephone (800) 647-5527) is
the same as the Mail address provided in the ADDRESSES section.
Comments will be available in the AD docket shortly after receipt.
Discussion
RRC was seeking to increase the LCF lives of the compressor wheels
used in AE 3007A1E and AE 1107C turbofan/turboshaft engines, by
applying an updated lifing methodology. However, their engine testing
and evaluation revealed that some of the compressor wheels experienced
crack initiation in the dovetail slots. RRC found that these parts were
likely to fail within their published lives, and that that failure
presented an unacceptable compromise to safety. As a result, RRC
decreased the published life limits of the compressor wheels, and also
recalculated and decreased the published life of certain compressor
cone shaft assemblies and 1st-to-2nd stage turbine spacers. We reviewed
RRC's testing results and reached the same conclusion. These
conditions, if not corrected, could lead to LCF failure of the parts
listed in Table 1 of this proposed AD, which could result in an
uncontained engine failure and damage to the aircraft.
FAA's Determination and Requirements of the Proposed AD
We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other products
of this same type design. We are proposing this AD, which would require
removal from service of the parts listed in Table 1 of this proposed
AD, at new, reduced, published life limits.
Costs of Compliance
We estimate that this proposed AD would affect 220 AE 3007A1E
turbofan engines installed on aircraft of U.S. registry. The proposed
action does not impose any additional labor costs since it will be
performed at engine overhaul. Required parts would cost about $100,000
per engine. Based on these figures, we estimate the total cost of the
proposed AD to U.S. operators to be $22,000,000.
[[Page 33026]]
Authority for This Rulemaking
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 detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed AD:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
3. Would not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD. You may get a copy of this summary at the
address listed under ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Under the authority delegated to me by the Administrator, the
Federal Aviation Administration proposes to amend 14 CFR part 39 as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new
airworthiness directive:
Rolls-Royce Corporation (Formerly Allison Engine Company, Inc.):
Docket No. FAA-2008-0230; Directorate Identifier 2007-NE-24-AD.
Comments Due Date
(a) The Federal Aviation Administration (FAA) must receive
comments on this airworthiness directive (AD) action by August 11,
2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Rolls-Royce Corporation (RRC) AE 3007A1E
and AE 1107C turbofan/turboshaft engines, with the following parts
in Table 1 installed, as applicable:
Table 1.--Affected Parts and Reduced Life Limits
----------------------------------------------------------------------------------------------------------------
New reduced
published life
Engine Part name Part No. limit, in
flight cycles
----------------------------------------------------------------------------------------------------------------
AE 3007A1E................................. 2nd Stage Compressor Wheel......... 23050752 15,200
3rd Stage Compressor Wheel......... 23065303 13,300
AE 1107C................................... 2nd Stage Compressor Wheel......... 23050752 11,400
2nd Stage Compressor Wheel......... 23084157 11,400
3rd Stage Compressor Wheel......... 23065303 6,200
3rd Stage Compressor Wheel (serial 23065303 5,000
numbers L72422, L72475, L72505,
L130704, L130829, L130830,
L138218, L138226, L138621,
L206084, L206163).
3rd Stage Compressor Wheel......... 23084158 6,200
4th Stage Compressor Wheel......... 23050754 14,900
4th Stage Compressor Wheel......... 23071259 14,900
4th Stage Compressor Wheel......... 23084159 14,900
Compressor Cone Shaft Assembly..... 23050728 2,900
Compressor Cone Shaft Assembly..... 23070729 2,900
1st to 2nd-Stage Turbine Spacer.... 23065300 9,500
----------------------------------------------------------------------------------------------------------------
AE 3007A1E turbofan engines are installed on, but not limited
to, EMBRAER EMB-135BJ and EMB-145XR airplanes. AE 1107C turboshaft
engines are U.S. type-certificated and are installed on, but not
limited to, certain U.S. military aircraft.
Unsafe Condition
(d) This AD results from RRC applying an updated lifing
methodology to the affected parts. We are issuing this AD to prevent
low-cycle-fatigue failure of the parts listed in Table 1 of this AD,
which could result in an uncontained engine failure and damage to
the aircraft.
Compliance
(e) You are responsible for having the actions required by this
AD performed within 5 days after the effective date of this AD,
unless the actions have already been done.
(f) Remove from service the parts listed in Table 1 of this AD,
at the new, reduced, published life limits specified in Table 1 of
this AD.
Alternative Methods of Compliance
(g) The Manager, Chicago Aircraft Certification Office, has the
authority to approve alternative methods of compliance for this AD
if requested using the procedures found in 14 CFR 39.19.
Related Information
(h) RRC Alert Service Bulletin (ASB) No. AE 3007A-A-72-346,
dated May 1, 2007; Service Bulletin No. AE 1107C-A-72-086, Revision
2, dated January 28, 2008; and ASB No. AE 1107C-A-72-089, dated
January 28, 2008, also pertain to the subject of this AD.
(i) Contact Michael Downs, Aerospace Engineer, Chicago Aircraft
Certification Office, Small Airplane Directorate, FAA, 2300 E. Devon
Ave., Des Plaines, IL 60018; telephone (847) 294-7870; fax (847)
294-7834, for more information about this AD.
[[Page 33027]]
Issued in Burlington, Massachusetts, on June 5, 2008.
Robert G. Mann,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. E8-13056 Filed 6-10-08; 8:45 am]
BILLING CODE 4910-13-P
