[Federal Register Volume 75, Number 52 (Thursday, March 18, 2010)]
[Proposed Rules]
[Pages 13045-13046]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-5861]
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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.
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Federal Register / Vol. 75, No. 52 / Thursday, March 18, 2010 /
Proposed Rules
[[Page 13045]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0026; Directorate Identifier 2010-NE-03-AD]
RIN 2120-AA64
Airworthiness Directives; CFM International, S.A. CFM56-5, -5B,
and -7B Series Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for CFM International, S.A. CFM56-5, -5B, and -7B series turbofan
engines. This proposed AD would require removing from service, nine
stage 3 low-pressure turbine (LPT) disks, identified by serial number
(S/N). This proposed AD results from the discovery of a material
nonconformity requiring removal of the disk before the certified disk
life of certain stage 3 LPT disks. We are proposing this AD to prevent
uncontained failure of the stage 3 LPT disk and damage to the airplane.
DATES: We must receive any comments on this proposed AD by May 17,
2010.
ADDRESSES: Use one of the following addresses to comment on this
proposed AD.
Federal eRulemaking Portal: Go to http://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.
FOR FURTHER INFORMATION CONTACT: Antonio Cancelliere, Aerospace
Engineer, Engine Certification Office, FAA, Engine & Propeller
Directorate, 12 New England Executive Park, Burlington, MA 01803; e-
mail: [email protected]; telephone (781) 238-7751; fax (781)
238-7199.
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-2010-0026; Directorate
Identifier 2010-NE-03-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 http://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 http://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
In February 2009, we were made aware by CFM International, S.A. of
stage 3 LPT disks, part number (P/N) 336-002-006-0, S/Ns DE255844,
DE256388, DE256622, DE256623, DE256625, DE256627, DE256628, DE256631,
and DE256637, being suspect of material non-conformity. This batch of
parts was subject to a quality problem during manufacturing. CFM
International, S.A. states that the manufacturing process has since
been revised to eliminate the quality problem. The non-conformity
requires removal from service of the suspect disks before their
certified life limits. Operating engines with these affected disks to
the certified life limit could result in uncontained failure of the
stage 3 LPT disk and damage to the airplane.
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. This proposed AD would require removing from
service any affected stage 3 LPT disks from engines before their
certified life limit. We are proposing this AD, which would require
removing the affected stage 3 LPT disks from service before
accumulating 9,500 cycles-since-new.
Costs of Compliance
We estimate that this proposed AD would affect two engines
installed on airplanes of U.S. registry. The pro-rated cost of the
replacement parts is $40,375 per engine. We estimate that no additional
labor costs would be incurred to perform the required disk removals,
because the removals would be done at time of engine shop visit. Based
on these figures, we estimate the total cost of the proposed AD to U.S.
operators to be $80,750.
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
[[Page 13046]]
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:
CFM International, S.A.: Docket No. FAA-2010-0026; Directorate
Identifier 2010-NE-03-AD.
Comments Due Date
(a) The Federal Aviation Administration (FAA) must receive
comments on this airworthiness directive (AD) action by May 17,
2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to CFM International CFM56-5, -5B, and -7B
series turbofan engines with stage 3 low-pressure turbine (LPT)
disks installed with the following serial numbers, (S/Ns) DE255844,
DE256388, DE256622, DE256623, DE256625, DE256627, DE256628,
DE256631, and DE256637. The -5 and -5B series engines are installed
on, but not limited to, Airbus A318, A319, A320, A321, and A340
airplanes, and the -7B series engines are installed on, but not
limited to, Boeing 737 series airplanes.
Unsafe Condition
(d) This AD results from the discovery of a material
nonconformity requiring removal of the disk before the certified
disk life of certain stage 3 LPT disks. We are issuing this AD to
prevent uncontained failure of the stage 3 LPT disk and damage to
the airplane.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance time specified unless the actions
have already been done.
Removal of Affected Stage 3 LPT Disks From Service
(f) Before accumulating 9,500 cycles-since-new, remove stage 3
LPT disks from service.
(g) After the effective date of this AD do not reinstall any
stage 3 LPT disk removed from service per paragraph (f) of this AD
into any engine.
Alternative Methods of Compliance
(h) The Manager, Engine 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
(i) Contact Antonio Cancelliere, Aerospace Engineer, Engine
Certification Office, FAA, Engine & Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; telephone (781) 238-7751; fax (781)
238-7199, for more information about this AD.
(j) CFM International, S.A. Service Bulletin (SB) No. CFM56-5B
S/B 72-0733, dated October 26, 2009, and SB No. CFM56-7B S/B 72-
0743, dated October 26, 2009, pertain to the subject of this AD.
Contact CFM International, Technical Publications Department, 1
Neumann Way, Cincinnati, OH 45215; telephone (513) 552-2800; fax
(513) 552-2816, for a copy of this service information.
Issued in Burlington, Massachusetts, on March 11, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2010-5861 Filed 3-17-10; 8:45 am]
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