[Federal Register Volume 75, Number 227 (Friday, November 26, 2010)]
[Rules and Regulations]
[Pages 72653-72655]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-29599]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0892; Directorate Identifier 2010-NE-23-AD;
Amendment 39-16524; AD 2010-24-05]
RIN 2120-AA64
Airworthiness Directives; Pratt & Whitney Canada Corp. (P&WC)
PW305A and PW305B Turboprop Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for the
products listed above. This AD results from mandatory continuing
airworthiness information (MCAI) issued by an aviation authority of
another country to identify and correct an unsafe condition on an
aviation product. The MCAI describes the unsafe condition as:
As a result of a change in the low-cycle fatigue lifing
methodology for the IMI 834 material, the recommended service life
of certain PW305A and PW305B Impellers has been reduced, as
published in the Airworthiness Limitations (AWL) section of Engine
Maintenance Manual (EMM).
The in-service life of impellers P/N 30B2185, 30B2486 and
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N
30B4565-01 from 8,500 to 7,000 cycles.
We are issuing this AD to prevent failure of the impeller, which
could result in an uncontained event and possible damage to the
airplane.
[[Page 72654]]
DATES: This AD becomes effective January 3, 2011. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in this AD as of January 3, 2011.
ADDRESSES: 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: James Lawrence, Aerospace Engineer,
Engine Certification Office, FAA, Engine & Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; phone: (781) 238-7176; fax: (781) 238-7199.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM was published in the Federal Register on August 19, 2010 (75
FR 51187). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:
As a result of a change in the low-cycle fatigue lifing
methodology for the IMI 834 material, the recommended service life
of certain PW305A and PW305B Impellers has been reduced, as
published in the Airworthiness Limitations (AWL) section of Engine
Maintenance Manual (EMM).
The in-service life of impellers P/N 30B2185, 30B2486 and
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N
30B4565-01 from 8,500 to 7,000 cycles.
This Airworthiness Directive (AD) is issued to mandate the
incorporation of the revised in-service life limits for the affected
impellers, in the AWL section of EMM, as introduced by Temporary
Revision (TR) AL-8.
Within 30 days from the effective date of this AD, update AWL
section of your PW305 EMM P/N 30B1402, to incorporate TR AL-8 for
compliance with the revised in-service limits for the affected
Impellers, installed on PW305A and PW305B engine.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comment received.
Request To Establish an Ending Engine Serial Number Applicability
One commenter, Bombardier--Learjet, asked us to establish an ending
engine serial number (S/N) applicability for the proposed AD. The
commenter said that any engine from S/N CA0651 forward will be linked
to the updated engine maintenance manual (EMM) with the 7,000 cycle
exducer life limit. Therefore, engines that have entered or will enter
service with the appropriate Airworthiness Limitations already included
in their EMM, will not be subject to this unsafe condition. To leave
the AD applicability open-ended, will cause hours of unnecessary review
and logbook entries for original equipment manufacturers (OEMs) and
operators of engines that do not have an unsafe condition.
We don't agree. Because there are no mandatory links between the
engine S/N and the EMM, there is no guarantee the EMM will stay with a
particular engine S/N. Also, because the proposed AD is a onetime
requirement to reduce the life limit for the exducer in the
Airworthiness Limitations Section, the proposed AD won't cause hours of
unnecessary review and logbook entries for OEMs and operators of
engines. We didn't change the proposed AD.
Conclusion
We 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
Based on the service information, we estimate that this AD will
affect about 114 products of U.S. registry. We also estimate that it
will take 0 work-hours per product to comply with this AD. The average
labor rate is $85 per work-hour. Required parts will cost about $54,288
per product. Based on these figures, we estimate the cost of the AD on
U.S. operators to be $6,188,832. Our cost estimate is exclusive of
possible warranty coverage.
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 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 this 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. 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 regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket.
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 (phone (800) 647-5527) is provided in the
ADDRESSES section. Comments will be available in the AD docket shortly
after receipt.
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 FAA 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 AD:
2010-24-05 Pratt & Whitney Canada Corp. (Formerly Pratt & Whitney
Canada, Inc.): Amendment 39-16524. Docket No.
[[Page 72655]]
FAA-2010-0829; Directorate Identifier 2010-NE-23-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective January
3, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Pratt & Whitney Canada Corp. (P&WC)
PW305A and PW305B turboprop engines with certain impellers, part
numbers (P/Ns) 30B2185, 30B2486, 30B2858-01, or 30B4565-01
installed. These engines are installed on, but not limited to,
Hawker-Beech Corporation BAe.125 series 1000A, 1000B, and Hawker
1000 airplanes and Learjet Inc. Learjet 60 airplanes.
Reason
(d) This AD results from:
As a result of a change in the low-cycle fatigue lifing
methodology for the IMI 834 material, the recommended service life
of certain PW305A and PW305B Impellers has been reduced, as
published in the Airworthiness Limitations (AWL) section of Engine
Maintenance Manual (EMM).
The in-service life of impellers P/N 30B2185, 30B2486 and
30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N
30B4565-01 from 8,500 to 7,000 cycles.
We are issuing this AD to prevent failure of the impeller, which
could result in an uncontained event and possible damage to the
airplane.
Actions and Compliance
(e) Unless already done, do the following actions.
(f) Within 30 days from the effective date of this AD, update
AWL section of your PW305 EMM P/N 30B1402, to incorporate Pratt &
Whitney Canada Corp. Temporary Revision (TR) AL-8, dated January 20,
2010, for compliance with the revised in-service limits for the
affected Impellers, installed on PW305A and PW305B engine.
FAA AD Differences
(g) None.
Other FAA AD Provisions
(h) The following provisions also apply to this AD:
Alternative Methods of Compliance (AMOCs)
(i) 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
(j) Refer to MCAI Transport Canada Airworthiness Directive CF-
2010-09, dated March 17, 2010, for related information.
(k) Contact James Lawrence, Aerospace Engineer, Engine
Certification Office, FAA, Engine & Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803; e-mail:
[email protected]; phone: (781) 238-7176; fax: (781) 238-7199,
for more information about this AD.
Material Incorporated by Reference
(l) You must use Pratt & Whitney Canada Corp. Temporary Revision
No. AL-8, dated January 20, 2010, to P&WC EMM P/N 30B1402 to do the
actions required by this AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact Pratt
& Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec,
Canada J4G 1A1; telephone (800) 268-8000; fax (450) 647-2888; or go
to: http://www.pwc.ca.
(3) 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 November 10, 2010.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2010-29599 Filed 11-24-10; 8:45 am]
BILLING CODE 4910-13-P