[Federal Register: December 14, 2006 (Volume 71, Number 240)]
[Rules and Regulations]
[Page 75108-75109]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14de06-3]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-26414; Directorate Identifier 2006-NE-42-AD;
Amendment 39-14854; AD 2006-25-13]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Corporation AE 2100D3
Turboprop Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
Rolls-Royce Corporation (RRC) AE 2100D3 turboprop engines. This AD
requires removing certain part number (P/N) compressor cone shaft
assemblies at a new reduced cyclic life limit of 5,000 engine cycles.
This AD results from low-cycle-fatigue testing and analysis of certain
P/N compressor cone shaft assemblies, by RRC. We are issuing this AD to
prevent uncontained failure of the compressor cone shaft assembly,
leading to engine shutdown and damage to the airplane.
DATES: This AD becomes effective December 29, 2006.
We must receive any comments on this AD by February 12, 2007.
ADDRESSES: Use one of the following addresses to comment on this AD:
DOT Docket Web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Governmentwide 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 Rolls-Royce Corporation, P.O. Box 420, Indianapolis, IN
46206-0420; telephone (317) 230-6400; fax (317) 230-4243 for the
service information identified in this AD.
FOR FURTHER INFORMATION CONTACT: Michael Downs, Aerospace Engineer,
Chicago Aircraft Certification Office, FAA, 2300 East Devon Avenue, Des
Plaines, IL 60018-4696; telephone (847) 294-7870; fax (847) 294-7834.
SUPPLEMENTARY INFORMATION: RRC conducted low-cycle-fatigue testing, and
strength and life analysis, of compressor cone shaft assemblies, P/Ns
23050728, 23070729, and 23076017. The study concluded that these
compressor cone shaft assemblies have a lower fatigue life than
originally calculated. This condition, if not corrected, could result
in uncontained failure of the compressor cone shaft assembly, leading
to engine shutdown and damage to the airplane.
FAA's Determination and Requirements of This AD
Although no airplanes that are registered in the United States use
these RRC AE 2100D3 turboprop engines, the possibility exists that the
engines could be used on airplanes that are registered in the United
States in the future. The unsafe condition described previously is
likely to exist or develop on other AE 2100D3 turboprop engines of the
same type design. We are issuing this AD to prevent uncontained failure
of the compressor cone shaft assembly, leading to engine shutdown and
damage to the airplane. This AD requires removing compressor cone shaft
assemblies, P/Ns 23050728, 23070729, and 23076017, at a new reduced
cyclic life limit of 5,000 engine cycles. The original cyclic life
limit was 20,000 engine cycles. RRC will revise Chapter 5 of the
maintenance
[[Page 75109]]
manual to show the new reduced cyclic life limit of 5,000 engine
cycles.
FAA's Determination of the Effective Date
Since there are currently no domestic operators of this engine
model, notice and opportunity for public comment before issuing this AD
are unnecessary. A situation exists that allows the immediate adoption
of this regulation.
Comments Invited
This AD is a final rule that involves requirements affecting flight
safety and was not preceded by notice and an opportunity for public
comment; however, we invite you to send us any written relevant data,
views, or arguments regarding this AD. Send your comments to an address
listed under ADDRESSES. Include ``AD Docket No. FAA-2006-26414;
Directorate Identifier 2006-NE-42-AD'' in the subject line of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the rule that might
suggest a need to modify it.
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
personnel concerning this 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 AD, any comments
received, and any final disposition in person at the Docket Management
Facility 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.
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 the 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. 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, Safety.
Adoption of the Amendment
0
Under the authority delegated to me by the Administrator, the Federal
Aviation Administration amends part 39 of the Federal Aviation
Regulations (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:
2006-25-13 Rolls-Royce Corporation (formerly Allison Engine Company,
Allison Gas Turbine Division, and Detroit Diesel Allison): Amendment
39-14854. Docket No. FAA-2006-26414; Directorate Identifier 2006-NE-
42-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective December
29, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Rolls-Royce Corporation (RRC) AE 2100D3
turboprop engines with a compressor cone shaft assembly, part number
23050728, 23070729, or 23076017, installed. These engines are
installed on, but not limited to, Lockheed Martin C-130J military
transport airplanes.
Unsafe Condition
(d) This AD results from low-cycle-fatigue testing and analysis
of the affected compressor cone shaft assemblies, by RRC. We are
issuing this AD to prevent uncontained failure of the compressor
cone shaft assembly, leading to engine shutdown and damage to the
airplane.
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.
Removal of Compressor Cone Shaft Assemblies
(f) After the effective date of this AD, remove compressor cone
shaft assemblies from service at the new reduced life limit of 5,000
engine cycles.
Alternative Methods of Compliance
(g) 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
(h) Rolls-Royce Corporation Alert Service Bulletin No. AE
2100D3-A-72-249, dated March 14, 2006, pertains to the subject of
this AD.
Material Incorporated by Reference
(i) None.
Issued in Burlington, Massachusetts, on December 6, 2006.
Diane Cook,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. E6-21185 Filed 12-13-06; 8:45 am]
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