[Federal Register Volume 76, Number 70 (Tuesday, April 12, 2011)]
[Rules and Regulations]
[Pages 20231-20232]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-8470]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2009-1185; Directorate Identifier 2009-NE-24-AD;
Amendment 39-16656; AD 2011-08-06]
RIN 2120-AA64
Airworthiness Directives; Honeywell International Inc. LTS101
Series Turboshaft Engines and LTP101 Series 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 requires removing certain power turbine
rotors from service using a specific drawdown schedule. This AD was
prompted by reports of fatigue cracks in the airfoil of the power
turbine blades. We are issuing this AD to prevent fracture of the power
turbine blade airfoil, which could result in sudden loss of engine
power and prevent continued safe flight or safe landing.
DATES: This AD is effective May 17, 2011.
ADDRESSES: For service information identified in this AD, contact
Honeywell International Inc., P.O. Box 52181, Phoenix, AZ 85072-2181;
phone: 800-601-3099 (U.S.A.) or 602-365-3099 (International); or go to:
https://portal.honeywell.com/wps/portal/aero. You may review copies of
the referenced service information at the FAA, Engine & Propeller
Directorate, 12 New England Executive Park, Burlington, MA. For
information on the availability of this material at the FAA, call 781-
238-7125.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility
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 address for the
Docket Office (phone: 800-647-5527) is Document Management Facility,
U.S. Department of Transportation, Docket Operations, M-30, West
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Robert Baitoo, Aerospace Engineer, Los
Angeles Aircraft Certification Office, FAA, Transport Airplane
Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562-
627-5245; fax: 562-627-5210; e-mail: [email protected].
SUPPLEMENTARY INFORMATION:
Discussion
We issued a supplemental notice of proposed rulemaking (SNPRM) to
amend 14 CFR part 39 to include an AD that would apply to the specified
products. That SNPRM published in the Federal Register on December 17,
2010 (75 FR 78937). The original notice of proposed rulemaking (74 FR
67829, December 21, 2009) proposed to require removing power turbine
blades, part number (P/N) 4-141-084-06 from service, using a drawdown
schedule. The SNPRM proposed to require expanding and clarifying the
applicability to include more engine models and power turbine blade P/
Ns that could have the unsafe condition, and clarifying the
applicability by specifying power turbine rotor P/Ns instead of the
blade P/Ns.
Comments
We gave the public the opportunity to participate in developing
this AD. We received no comments on the SNPRM.
Conclusion
We reviewed the relevant data 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 240 engines installed on
aircraft of U.S. registry. We also estimate that it will take about 30
work-hours per engine to perform the actions, and that the average
labor rate is $85 per work-hour. If all removed power turbine rotors
get replaced, required parts will cost about $70,000 per engine. Based
on these figures, we estimate the total cost of the AD to U.S.
operators to be $17,412,000.
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
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),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
[[Page 20232]]
Adoption of the Amendment
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 airworthiness
directive (AD):
2011-08-06 Honeywell International Inc. (Formerly AlliedSignal,
Textron Lycoming): Amendment 39-16656; Docket No. FAA-2009-1185;
Directorate Identifier 2009-NE-24-AD.
Effective Date
(a) This AD is effective May 17, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Honeywell International LTS101-600A-2, -
3, -3A, LTS101-700D-2, LTS101-650B-1, LTS101-650C-3, LTS101-650C-3A,
LTS101-750B-1, LTS101-750B-2, LTS101-750C-1, and LTS101-850B-2
turboshaft engines; and LTP101-600A-1A and LTP101-700A-1A turboprop
engines with power turbine rotor, part number (P/N) 4-141-290-01, -
02, -03, -05, -06, -11, -12, -13, -14, or -16, installed. These
engines are installed on, but not limited to, Eurocopter AS350 and
BK117 series and Bell 222 series helicopters; and Page Thrush, Air
Tractor AT-302, and Pacific Aero 08-600, Piaggio P166 DL3, and Riley
International R421 airplanes.
Unsafe Condition
(d) This AD results from reports of fatigue cracks in the
airfoil of the power turbine blade. We are issuing this AD to
prevent fracture of the power turbine blade airfoil, which could
result in sudden loss of engine power and prevent continued safe
flight or safe 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) For engines with power turbine rotors, P/Ns 4-141-290-11, -
12, -13, and -14, marked with ``ORI T41881,'' on the aft hub in the
vicinity of the P/N, no further action is required.
Removing Power Turbine Rotors From LTS101-600A-2, -3, -3A, and LTS101-
700D-2 Turboshaft Engines and LTP101-600A-1A and LTP101-700A-1A
Turboprop Engines
(g) For LTS101-600A-2, -3, -3A, and LTS101-700D-2 turboshaft
engines and LTP101-600A-1A and LTP101-700A-1A turboprop engines,
remove power turbine rotors, P/Ns 4-141-290-01, -02, -03, -05, -06,
-11, -12, -13, -14, or -16, using the cycles specified in Table 1 of
this AD:
Table 1--Drawdown Cycles for LTS101-600A-2, -3, -3A, and LTS101-700D-2
Turboshaft Engines and LTP101-600A-1A and LTP101-700A-1A Turboprop
Engines
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If power turbine rotor time
on the effective date of this Then remove the power turbine rotor from
AD is . . . the engine . . .
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(1) Fewer than 5,000 cycles- Between 5,000 and 5,500 CSN.
since-new (CSN).
(2) 5,000 to 7,899 CSN....... Within 500 cycles-in-service (CIS) after
the effective date of this AD or before
exceeding 8,000 CSN, whichever occurs
first.
(3) 7,900 to 9,999 CSN....... Within 100 CIS after the effective date
of this AD or before exceeding 10,050
CSN, whichever occurs first.
(4) 10,000 or more CSN....... Within 50 CIS after the effective date of
this AD.
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Removing Power Turbine Rotors From LTS101-650B-1, -650C-3,--650C-3A, -
750B-1, -2, -750C-1, and -850B-2 Engines
(h) Remove power turbine rotors, P/Ns 4-141-290-01, -02 -03, -
05, -06, -11, -12, -13, -14, or -16, using the cycles specified in
Table 2 of this AD:
Table 2--Drawdown Cycles for LTS101-650B-1, -650C-3,-650C-3A, -750B-1, -
2, -750C-1, and -850B-2 Engines
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If power turbine rotor time
on the effective date of this Then remove the power turbine rotor from
AD is . . . the engine . . .
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(1) Fewer than 5,500 CSN..... Between 5,000 and 7,200 CSN.
(2) 5,500 to 7,999 CSN....... Within 1,700 CIS after the effective date
of this AD or before exceeding 8,950
CSN, whichever occurs first.
(3) 8,000 to 9,999 CSN....... Within 950 CIS after the effective date
of this AD or before exceeding 10,400
CSN, whichever occurs first.
(4) 10,000 or more CSN....... Within 400 CIS after the effective date
of this AD.
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Alternative Methods of Compliance
(i) The Manager, Los Angles Aircraft 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
(j) Contact Robert Baitoo, Aerospace Engineer, Los Angeles
Aircraft Certification Office, FAA, Transport Airplane Directorate,
3960 Paramount Blvd., Lakewood, CA 90712-4137; phone: 562-627-5245;
fax: 562-627-5210; e-mail: [email protected], for more
information about this AD.
(k) Honeywell International Inc. Service Bulletins LT 101-71-00-
0252 and LTS101-71-00-0253, pertain to the subject of this AD.
Contact Honeywell International Inc., P.O. Box 52181, Phoenix, AZ
85072-2181; telephone (800) 601-3099 (U.S.A.) or (602) 365-3099
(International); or go to: https://portal.honeywell.com/wps/portal/aero, for a copy of this service information.
Issued in Burlington, Massachusetts, on March 30, 2011.
Peter A. White,
Acting Manager, Engine & Propeller Directorate, Aircraft Certification
Service.
[FR Doc. 2011-8470 Filed 4-11-11; 8:45 am]
BILLING CODE 4910-13-P