[Federal Register Volume 75, Number 109 (Tuesday, June 8, 2010)]
[Rules and Regulations]
[Pages 32262-32263]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-13432]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2009-0606; Directorate Identifier 2009-NE-11-AD;
Amendment 39-16324; AD 2010-12-03]
RIN 2120-AA64
Airworthiness Directives; CFM International, S.A. Models CFM56-3
and -3B Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain CFM International, S.A. models CFM56-3 and -3B turbofan
engines. This AD requires initial and repetitive inspections for damage
to the fan blades. This AD results from a report of a failed fan blade
with severe out-of-limit wear on the underside of the blade platform
where it contacts the damper. We are issuing this AD to prevent failure
of multiple fan blades, which could result in an uncontained failure of
the engine and damage to the airplane.
DATES: This AD becomes effective July 13, 2010. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in the regulations as of July 13, 2010.
ADDRESSES: You can get the service information identified in this AD
from CFM International, S. A., Technical Publication Department, 1
Neumann Way, Cincinnati, OH 45215; telephone (513) 552-2800; fax (513)
552-2816.
The Docket Operations office is located at Docket Management
Facility, U.S. Department of Transportation, 1200 New Jersey Avenue,
SE., West Building Ground Floor, Room W12-140, Washington, DC 20590-
0001.
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: The FAA proposed to amend 14 CFR part 39
with a proposed AD. The proposed AD applies to certain CFM
International, S.A. models CFM56-3 and -3B turbofan engines. We
published the proposed AD in the Federal Register on July 23, 2009 (74
FR 36420), and published a supplemental proposed AD in the Federal
Register on April 1, 2010 (75 16361). Those actions proposed to require
initial and repetitive inspections for damage to the fan blades.
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 AD, the regulatory evaluation,
any comments received, and other information. The street address for
the Docket Operations office (telephone (800) 647-5527) is provided in
the ADDRESSES section. Comments will be available in the AD docket
shortly after receipt.
Comments
We provided the public the opportunity to participate in the
development of this AD. We previously responded to the comments
received on the original proposed AD in the supplemental proposed AD.
We have considered the one comment received on the supplemental
proposed AD. The commenter supports the proposal.
Conclusion
We have carefully reviewed the available data, including the
comment received, and determined that air safety and the public
interest require adopting the AD as proposed.
Costs of Compliance
We estimate that this AD will affect 50 engines installed on
airplanes of U.S. registry. We also estimate that it will take about 8
work-hours per engine to perform the AD actions, and that the average
labor rate is $80 per work-hour. Required parts will cost about $38,000
per engine. Based on these figures, we estimate the total cost of the
AD to U.S. operators to be $1,932,000.
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 AD will not have federalism
implications under Executive Order 13132. This AD will 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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866;
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979); and
(3) Will 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 summary of the costs to comply with this AD and
placed it in the AD Docket. 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, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, under the authority delegated to me by the Administrator,
the Federal Aviation Administration amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
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]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
2010-12-03 CFM International, S.A.: Amendment 39-16324. Docket No.
FAA-2009-0606; Directorate Identifier 2009-NE-11-AD.
[[Page 32263]]
Effective Date
(a) This airworthiness directive (AD) becomes effective July 13,
2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to CFM International, S.A. models CFM56-3
and -3B turbofan engines with 25 degrees midspan shroud fan blades,
part numbers (P/Ns) 9527M99P08, 9527M99P09, 9527M99P10, 9527M99P11,
1285M39P01, or fan blade pairs, P/Ns 335-088-901-0, 335-088-902-0,
335-088-903-0, and 335-088-904-0 installed. These engines are
installed on, but not limited to, Boeing 737 series airplanes.
(d) CFM International, S.A. has added to the basic engine model
number on the engine nameplate to identify minor variations in
engine configuration, installation components, or reduced ratings
peculiar to aircraft installation requirements.
(e) Those engines marked on the engine data plate as CFM56-3-B1
are included in this AD as CFM56-3 turbofan engines.
(f) Those engines marked on the engine data plate as CFM56-3B-2
are included in this AD as CFM56-3B turbofan engines.
Unsafe Condition
(g) This AD results from a report of a failed fan blade with
severe out-of-limit wear on the underside of the blade platform
where it contacts the damper. We are issuing this AD to prevent
failure of multiple fan blades, which could result in an uncontained
failure of the engine and damage to the airplane.
Compliance
(h) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Inspection for Wear
(i) Within 900 cycles-in-service after the effective date of
this AD, perform an on-wing or in-shop inspection of the fan blade
and damper for wear. Use paragraphs 3.A.(1) through 3.A.(5) or
paragraphs 3.B.(1) through 3.B.(5) respectively, of the
Accomplishment Instructions of CFM International Service Bulletin
(SB) No. CFM56-3/3B/3C S/B 72-1067, dated February 15, 2007.
(j) If you find out-of-limit wear on at least one fan blade
platform underside, perform the additional inspections and
disposition the parts, as specified in paragraphs 3.A.(3) and
3.A.(5) or paragraphs 3.B.(3) and 3.B.(5) respectively, of the
Accomplishment Instructions of CFM International SB No. CFM56-3/3B/
3C S/B 72-1067, dated February 15, 2007.
(k) Thereafter, within intervals not to exceed 3,000 cycles-
since-last inspection, perform an on-wing or in-shop inspection for
wear. Use paragraphs 3.A.(1) through 3.A.(5) or paragraphs 3.B.(1)
through 3.B.(5) respectively, of the Accomplishment Instructions of
CFM International SB No. CFM56-3/3B/3C S/B 72-1067, dated February
15, 2007.
(l) If you find wear on at least one fan blade platform
underside, perform additional inspections and disposition the parts,
as specified in paragraphs 3.A.(3) and 3.A.(5) or paragraphs 3.B.(3)
and 3.B.(5) respectively, of the Accomplishment Instructions of CFM
International SB No. CFM56-3/3B/3C S/B 72-1067, dated February 15,
2007.
Installation Prohibition
(m) After the effective date of this AD, don't install any 25
degrees midspan shroud fan blades, P/Ns 9527M99P08, 9527M99P09,
9527M99P10, 9527M99P11, 1285M39P01, or fan blade pairs, P/Ns 335-
088-901-0, 335-088-902-0, 335-088-903-0, and 335-088-904-0, unless
they have passed an inspection specified in paragraph 3. of the
Accomplishment Instructions of CFM International SB No. CFM56-3/3B/
3C S/B 72-1067, dated February 15, 2007.
Optional Terminating Action
(n) Replacing the 25 degrees midspan shroud fan blade set with a
37 degrees midspan shroud fan blade set terminates the repetitive
inspection requirements specified in paragraph (k) of this AD.
Alternative Methods of Compliance
(o) 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
(p) 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.
(q) European Aviation Safety Agency AD 2009-0036, dated February
20, 2009, also addresses the subject of this AD.
Material Incorporated by Reference
(r) You must use CFM International Service Bulletin No. CFM56-3/
3B/3C S/B 72-1067, dated February 15, 2007, to perform the
inspections and parts dispositions required by this AD. The Director
of the Federal Register approved the incorporation by reference of
this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR
part 51. Contact CFM International, S. A., Technical Publication
Department, 1 Neumann Way, Cincinnati, OH 45215; telephone (513)
552-2800; fax (513) 552-2816, for a copy of this service
information. You may review copies at the FAA, New England Region,
12 New England Executive Park, Burlington, MA; or at the National
Archives and Records Administration (NARA). For information on the
availability of this material at NARA, call 202-741-6030, or go to:
http://www.archives.gov/federal-register/cfr/ibr-locations.html.
Issued in Burlington, Massachusetts, on May 25, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2010-13432 Filed 6-7-10; 8:45 am]
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