[Federal Register: January 17, 2007 (Volume 72, Number 10)]
[Proposed Rules]
[Page 1949-1951]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17ja07-14]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
RIN 2120-AA64
[Docket No. FAA-2006-25896; Directorate Identifier 2006-NE-33-AD]
Airworthiness Directives; General Electric Company CF34-10E
Series Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to supersede an existing airworthiness
directive (AD) for General Electric Company (GE) CF34-10E series
turbofan engines. That AD currently requires removing the fuel inlet
strainer from main fuel pump (MFP) part number (P/N) 2043M12P03,
installing a certain replacement flange as an interim repair, remarking
the MFP to P/N 2043M12P04, and performing initial and repetitive visual
inspections of the main fuel filter. This proposed AD would require
removing MFPs, P/N 2043M12P03 and 2043M12P04 from service and
installing an improved MFP with a different P/N. This proposed AD
results from GE determining that the cause of MFP fuel strainer failure
is a design problem with the strainer. We are proposing this AD to
prevent engine in-flight shutdown due to MFP malfunctions.
DATES: We must receive any comments on this proposed AD by March 19,
2007.
ADDRESSES: Use one of the following addresses to comment on this
proposed AD.
DOT Docket Web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to http://www.regulations.gov
and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility; U.S. Department of
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401,
Washington, DC 20590-0001.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact General Electric Company via Lockheed Martin Technology
Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215,
telephone (513) 672-8400, fax (513) 672-8422, for the service
information identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: Tara Fitzgerald, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803; telephone: (781) 238-
7130, fax: (781) 238-7199.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments regarding this proposal. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2006-25896;
Directorate Identifier 2006-NE-33-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://dms.dot.gov
, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
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personnel concerning this proposed AD. Using the search function of the
DMS Web site, anyone can find and read the comments in any of our
dockets, including 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) or you
may visit http://dms.dot.gov.
Examining the AD Docket
You may examine the docket that contains the proposal, any comments
received and any final disposition in person at the DMS Docket Office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Office (telephone (800) 647-5227) is located on
the plaza level of the Department of Transportation Nassif Building at
the street address stated in ADDRESSES. Comments will be available in
the AD docket shortly after the DMS receives them.
Discussion
On September 21, 2006, we issued AD 2006-20-06, Amendment 39-14775
(71 FR 60663, October 16, 2006). That AD requires removing the MFP
inlet strainer from the MFPs, installing a certain replacement flange
as an interim repair, remarking the MFP to P/N 2043M12P04, and
performing initial and repetitive visual inspections of the main fuel
filter. That AD was the result of three reports of release of the
tripod support legs on the MFP inlet strainer, leading to engine in-
flight shutdown. That condition, if not corrected, could result in
engine in-flight shutdown due to MFP malfunctions.
Actions Since AD 2006-20-06 Was Issued
Since AD 2006-20-06 was issued, GE determined that the cause of MFP
fuel inlet strainer failure is a design problem with the strainers
installed in the MFPs. GE has introduced MFP P/N 2043M12P05, which has
a more robust design fuel inlet strainer.
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. For that reason, we are proposing this AD,
which would require removing MFPs, P/N 2043M12P03 and 2043M12P04 from
service and installing an improved MFP, not later than April 30, 2007.
Costs of Compliance
We estimate that this proposed AD would affect 50 CF34-10E series
turbofan engines installed on airplanes of U.S. registry. We also
estimate that it would take about 3 work-hours per engine to perform
the proposed actions, and that the average labor rate is $80 per work-
hour. Required parts would cost about $4,226 per engine to upgrade the
MFP to a different P/N to make it serviceable. Based on these figures,
we estimate the total upgrade cost of the proposed AD to U.S. operators
to be $223,300.
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
regulation:
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. See the ADDRESSES section for a location
to examine the regulatory evaluation.
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 removing Amendment 39-14775 (71 FR
60663, October 16, 2006) and by adding a new airworthiness directive to
read as follows:
General Electric Company: Docket No. FAA-2006-25896; Directorate
Identifier 2006-NE-33-AD.
Comments Due Date
(a) The Federal Aviation Administration (FAA) must receive
comments on this airworthiness directive (AD) action by March 19,
2007.
Affected ADs
(b) This AD supersedes AD 2006-20-06, Amendment 39-14755.
Applicability
(c) This AD applies to General Electric Company (GE) CF34-
10E2A1, -10E5, -10E5A1, -10E6, -10E6A1, and -10E7 turbofan engines,
with main fuel pump (MFP) part number (P/N) 2043M12P03 or P/N
2043M12P04, installed. These engines are installed on, but not
limited to, Embraer ERJ 190-100-STD, ERJ 190-100-LR, and ERJ 190-
100-IGW airplanes.
Unsafe Condition
(d) This AD results from GE determining that the cause of MFP
fuel strainer failure is a design problem with the strainer. We are
issuing this AD to prevent engine in-flight shutdown due to MFP
malfunctions.
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.
MFP Removal and Installation
(f) Not later than April 30, 2007, remove MFPs, P/N 2043M12P03
and 2043M12P04, from service and install a serviceable MFP.
Definition
(g) For the purpose of this AD, a serviceable MFP is one that
does not have P/N 2043M12P03 or 2043M12P04.
Recommended Actions
(h) We recommend that operators avoid performing the actions in
this AD on both
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engines installed on the same airplane at the same time, if at all
possible.
Alternative Methods of Compliance
(i) The Manager, Engine Certification Office, FAA, 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
(j) GE Service Bulletin No. CF34-10E S/B 73-0013, dated December
15, 2006, pertains to the subject of this AD.
(k) Contact Tara Fitzgerald, Aerospace Engineer, Engine
Certification Office, FAA, Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; telephone (781) 238-
7138, fax (781) 238-7199; e-mail: tara.fitzgerald@faa.gov for more
information about this AD.
Issued in Burlington, Massachusetts, on January 10, 2007.
Francis A. Favara,
Manager, Engine and Propeller Directorate, Aircraft Certification
Service.
[FR Doc. E7-498 Filed 1-16-07; 8:45 am]
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