[Federal Register Volume 75, Number 85 (Tuesday, May 4, 2010)]
[Rules and Regulations]
[Pages 23574-23576]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-10177]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-1353; Directorate Identifier 2008-NE-46-AD;
Amendment 39-16279; AD 2010-09-14]
RIN 2120-AA64
Airworthiness Directives; CFM International, S.A. CFM56-5B1/P, -
5B2/P, -5B3/P, -5B3/P1, -5B4/P, -5B5/P, -5B6/P, -5B7/P, -5B8/P, -5B9/P,
-5B1/2P, -5B2/2P, -5B3/2P, -5B3/2P1, -5B4/2P, -5B4/P1, -5B6/2P, -5B4/
2P1, and -5B9/2P Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is superseding an existing airworthiness directive
(AD) for CFM International, S.A. CFM56-5B series turbofan engines. That
AD requires reviewing exhaust gas temperature (EGT) monitoring records
to determine EGT margin deterioration, and for airplanes where both
engines have greater than 80 [deg]centigrade (C) of EGT margin
deterioration, borescope-inspecting the high-pressure compressor (HPC)
of both engines. That AD also requires removing from service any engine
that does not pass the borescope inspection and, if both engines pass,
replacing one of the engines with an engine that has 80 [deg]C or less
of EGT margin deterioration. That AD also requires continuous
monitoring of EGT margin deterioration on engines in service to prevent
two engines on an airplane from having greater than 80 [deg]C of EGT
margin deterioration. This AD:
Reduces the number of engine models affected;
Continues to monitor EGT margin deterioration;
Lowers the EGT margin threshold from 80 [deg]C to 75
[deg]C;
Removes FADEC software version 5.B.Q and earlier versions
from the engine as mandatory terminating action to the continuous EGT
margin deterioration monitoring, for certain engine models;
Removes the requirement to borescope inspect; and
Removes the requirement to replace one of the engines with
an engine that has 80 [deg]C or less deterioration of EGT margin as a
corrective action.
This AD results from a reduction of the affected engine models
listed in AD 2009-01-01 from 25 to 19, a reduction in the engine EGT
margin deterioration threshold from 80 [deg]C to 75 [deg]C, the
introduction of terminating action to the continuous EGT monitoring for
certain engines, and a change to the removal plan for the remaining
engines if the EGT margin deterioration is greater than 75 [deg]C. We
are issuing this AD to prevent HPC stalls, which could prevent
continued safe flight or landing.
DATES: This AD becomes effective June 8, 2010. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in the regulations as of June 8, 2010.
ADDRESSES: You can get the service information identified in this AD
from CFM International, S.A., Technical Customer Support, 1 Neumann
Way,
[[Page 23575]]
Cincinnati, OH 45215; telephone (513) 552-3272; fax (513) 552-3329, Web
address http://customer.geae.com.
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: Wayne Maguire, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; telephone (781) 238-7778; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 by
superseding AD 2009-01-01, Amendment 39-15779 (73 FR 80296, December
31, 2008), with a proposed AD. The proposed AD applies to CFM
International, S.A. CFM56-5B series turbofan engines. We published the
proposed AD in the Federal Register on December 21, 2009 (74 FR 67834).
That action proposed to require continuous monitoring of EGT margin
deterioration, removing FADEC software version 5.B.Q and earlier
versions from the engine as mandatory terminating action to the
repetitive recalculating and EGT monitoring for certain engine models,
and removing other certain engine models from service if the EGT margin
deterioration is greater than 75 [deg]C.
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 have considered the comments received.
Request To Clarify Engine Replacement Requirements
One commenter, CFM International, S.A., requests that we change the
proposed AD to state, in part: ``For airplanes where both engines
indicate more than 75 [deg]C EGT margin deterioration, within 150 CIS
either remove one engine and replace it with an engine indicating less
than 75 [deg]C EGT margin.''
We do not agree. When both installed engines have greater than 75
[deg]C EGT margin deterioration, the proposed AD no longer allows
replacing one of the engines with an engine that has 75 [deg]C or less
of EGT margin deterioration as a corrective action. We do not agree
with the commenter's requested change, but we see an opportunity to
clarify that the terminating action for this AD for certain engine
models, is to remove FADEC software version 5.B.Q and earlier. For
other engine models, the corrective action is to remove those engines
from service that have greater than 75 [deg]C of EGT margin
deterioration. We added this clarification to the Summary of this AD.
We kept the same engine replacement requirements in this AD, as those
in the proposed AD.
Request To Reference the Latest Version of Software
CFM International, S.A. requests that we reference the latest
version of software to be installed, which is version 5.B.R.
We do not agree. We intentionally referenced the software versions
needing to be removed but not the version to be installed, as that
version could become superseded in the future. We did not change the
AD.
Request To Correct the Service Information Reference
CFM International, S.A. requests that we correct the service
information reference in paragraph (k) to read ``CFM International,
S.A. Alert Service Bulletin No. CFM56-5B S/B 72-A0722, Revision 1,
dated March 20, 2009.''
We agree. We changed the AD to reflect the new service information
reference throughout the compliance section.
Request To Indent Sub-Paragraphs
CFM International, S.A. requests that we indent the proposed AD
numbered sub-paragraphs, as this further distinguishes the unique
terminating actions for each group of identified CFM56 engine models.
We do not agree. Rulemaking procedures require that we do not
indent sub-paragraphs. We did not change the AD.
Request To Alleviate
Two private commenters request that the prohibition against using
engine control software version 5.B.Q or earlier versions, be
alleviated for the CFM56-5B/2P (dual annular combustor) family of
engine models. One other commenter requests that we move the contents
of paragraph (h) to paragraph (f). The commenters state that the
currently available engine control software version for those engines
is earlier than version 5.B.Q.
We partially agree. We clarified paragraph (h) to apply to only
those engine models where terminating action includes engine control
software. We also added a second prohibition paragraph to apply to only
those engines listed in paragraph (g). However, we did not move the
contents of paragraph (h) to paragraph (f).
Conclusion
We have carefully reviewed the available data, including the
comments received, and determined that air safety and the public
interest require adopting the AD with the changes described previously.
We have determined that these changes will neither increase the
economic burden on any operator nor increase the scope of the AD.
Costs of Compliance
We estimate that this AD will affect 397 engines installed on
airplanes of U.S. registry. We also estimate that it will take about
one work-hour to install FADEC software. The average labor rate is $80
per work-hour. There are no required parts costs. Based on these
figures, we estimate the total cost of the AD to U.S. operators to be
$31,760.
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,
[[Page 23576]]
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 removing Amendment 39-15779 (73 FR
80296, December 31, 2008) and by adding a new airworthiness directive,
Amendment 39-16279, to read as follows:
2010-09-14 CFM International, S.A.: Amendment 39-16279. Docket No.
FAA-2008-1353; Directorate Identifier 2008-NE-46-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective June 8,
2010.
Affected ADs
(b) This AD supersedes AD 2009-01-01, Amendment 39-15779.
Applicability
(c) This AD applies to CFM International, S.A. CFM56-5B1/P, -
5B2/P, -5B3/P, -5B3/P1, -5B4/P, -5B5/P, -5B6/P, -5B7/P, -5B8/P, -
5B9/P, -5B1/2P, -5B2/2P, -5B3/2P, -5B3/2P1, -5B4/2P, -5B4/P1, -5B6/
2P, -5B4/2P1, and -5B9/2P turbofan engines. These engines are
installed on, but not limited to, Airbus A318, A319, A320, and A321
series airplanes.
Unsafe Condition
(d) This AD results from a reduction of the affected engine
models listed in AD 2009-01-01 from 25 to 19, a reduction in the
engine exhaust gas temperature (EGT) margin deterioration threshold
from 80 [deg]C to 75 [deg]C, the introduction of terminating action
to the continuous EGT monitoring for certain engines, and a change
to the removal plan for the remaining engines if the EGT margin
deterioration is greater than 75 [deg]C. We are issuing this AD to
prevent high-pressure compressor stalls, which could prevent
continued safe flight or landing.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified unless the
actions have already been done.
(f) On the effective date of this AD, and at any time after the
effective date of this AD, for CFM International, S.A. CFM56-5B1/P,
-5B2/P, -5B3/P, -5B3/P1, -5B4/P, -5B4/P1, -5B5/P, -5B6/P, -5B7/P, -
5B8/P and -5B9/P turbofan engines:
(1) Monitor and calculate engine EGT margin deterioration. Use
paragraphs 3.A.(2) and 3.A.(3) of the Accomplishment Instructions
and Appendix A of CFM International, S.A. Alert Service Bulletin
(ASB) No. CFM56-5B S/B 72-A0722, Revision 1, dated March 20, 2009,
to do the monitoring and calculating.
(2) As mandatory terminating action to the repetitive
recalculating and monitoring of EGT margin deterioration, remove
FADEC software version 5.B.Q and earlier versions from engines that
have greater than 75 [deg]C of EGT margin deterioration within 150
additional cycles-in-service (CIS).
(3) As mandatory terminating action to the repetitive
recalculating and monitoring of EGT margin deterioration, remove
FADEC software version 5.B.Q and earlier versions from engines that
have less than or equal to 75 [deg]C of EGT margin deterioration
within 900 additional CIS.
(g) On the effective date of this AD, and at any time after the
effective date of this AD, for CFM International, S.A. CFM56-5B1/2P,
-5B2/2P, -5B3/2P, -5B3/2P1, -5B4/2P, -5B4/2P1, -5B6/2P and -5B9/2P
turbofan engines:
(1) Monitor and calculate engine EGT margin deterioration. Use
paragraphs 3.A.(2) and 3.A.(3) of the Accomplishment Instructions
and Appendix A of CFM International, S.A. ASB No. CFM56-5B S/B 72-
A0722, Revision 1, dated March 20, 2009, to do the monitoring and
calculating.
(2) Remove engines from service that have greater than 75 [deg]C
of EGT margin deterioration within 150 additional CIS.
Installation Prohibitions
(h) For engines listed in paragraph (f) of this AD, after the
effective date of this AD, do not install FADEC software version
5.B.Q or any earlier software versions.
(i) For engines listed in paragraph (g) of this AD, after the
effective date of this AD, do not install an engine that has greater
than 75 [deg]C of EGT margin deterioration.
Interim Actions
(j) These actions are interim actions and we anticipate further
rulemaking actions in the future, including further action to
address the remaining engines in service that are above 75 [deg]C
deterioration of EGT margin.
Alternative Methods of Compliance (AMOCs)
(k) The Manager, Engine Certification Office, FAA, has the
authority to approve AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19.
Related Information
(l) Refer to European Aviation Safety Agency Airworthiness
Directive 2009-0088, Revision 1, dated April 28, 2009, for related
information.
(m) Contact Wayne Maguire, Aerospace Engineer, Engine
Certification Office, FAA, Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; telephone (781) 238-7778; fax (781) 238-7199,
for more information about this AD.
Material Incorporated by Reference
(n) You must use CFM International, S. A. Alert Service Bulletin
No. CFM56-5B S/B 72-A0722, Revision 1, dated March 20, 2009, to
perform the EGT calculating and monitoring 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
Customer Support, 1 Neumann Way, Cincinnati, OH 45215; telephone
(513) 552-3272; fax (513) 552-3329, Web address http://customer.geae.com, 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 April 23, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2010-10177 Filed 5-3-10; 8:45 am]
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