[Federal Register Volume 73, Number 21 (Thursday, January 31, 2008)]
[Rules and Regulations]
[Pages 5735-5737]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-1238]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-27891; Directorate Identifier 2007-NE-14-AD;
Amendment 39-15349; AD 2008-02-19]
RIN 2120-AA64
Airworthiness Directives; Honeywell International Inc. TFE731-2C,
-3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -
20BR, -40, -40AR, -40R, and -60 Series Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, -
3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -
40R, and -60 series turbofan engines. This AD requires removal from
service of certain high pressure (HP) turbine rotor assemblies with
part numbers (P/Ns) 3075772-1 and 3060841-1 using a drawdown schedule,
and returning them to Honeywell for curvic root radius inspection. This
AD results from the manufacturer's report
[[Page 5736]]
that some HP turbine rotor discs received improperly machined radii in
the root of the forward and aft curvic teeth during manufacture. We are
issuing this AD to prevent uncontained failure of the HP turbine rotor
assembly, which could result in damage to the airplane.
DATES: This AD becomes effective March 6, 2008. The Director of the
Federal Register approved the incorporation by reference of certain
publications listed in the regulations as of March 6, 2008.
ADDRESSES: You can get the service information identified in this AD
from Honeywell Technical Publications and Distribution, M/S 2101-201,
P.O. Box 52170, Phoenix, AZ 85072-2170; telephone: (602) 365-2493
(General Aviation), (602) 365-5535 (Commercial Aviation), fax: (602)
365-5577 (General Aviation and Commercial Aviation).
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: Joseph Costa, Aerospace Engineer, Los
Angeles Aircraft Certification Office, FAA, Transport Airplane
Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; e-mail:
[email protected]; telephone: (562) 627-5246; fax: (562) 627-5210.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39
with a proposed AD. The proposed AD applies to Honeywell TFE731-2C, -
3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -
20BR, -40, -40AR, -40R, and -60 series turbofan engines. We published
the proposed AD in the Federal Register on September 4, 2007 (72 FR
50648). That action proposed to require removal from service of certain
HP turbine rotor assemblies with P/Ns 3075772-1 and 3060841-1 using a
drawdown schedule, and returning them to Honeywell for curvic root
radius inspection.
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 received no comments on the proposal or on
the determination of the cost to the public.
Conclusion
We have carefully reviewed the available 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 400 HP turbine rotor discs
installed in TFE731-20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series
turbofan engines, and 170 HP turbine rotor discs installed in TFE731-
2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, and -5R series
turbofan engines, installed in airplanes of U.S. registry. We also
estimate that it will take about 42 work-hours per engine to perform
the actions at an unscheduled removal, and about 2 work-hours at a
scheduled removal. The average labor rate is $80 per work-hour.
Required parts will cost about $46,535 per engine. We estimate that 50
percent of the HP turbine rotor discs will fail the curvic root radius
inspection. Based on these figures, we estimate the total cost of the
AD to U.S. operators to be $13,490,000.
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
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 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 adding the following new airworthiness
directive:
2008-02-19 Honeywell International Inc. (formerly AlliedSignal Inc.
and Garrett Turbine Engine Co.): Amendment 39-15349. Docket No. FAA-
2007-27891; Directorate Identifier 2007-NE-14-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective March 6,
2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Honeywell International Inc. (Honeywell)
TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -
20R, -20AR, -20BR, -40, -40AR, -40R, and -60 series turbofan engines
with certain high pressure (HP) turbine rotor discs part numbers and
serial numbers. These engines are installed on, but not limited to,
the following airplanes:
Avions Marcel Dassault Mystere-Falcon 10 and 50 Series
[[Page 5737]]
Cessna Model 650; Citations III, VI, and VII
Dassault-Aviation 20, 50, 50EX, 900, MF900, and 900EX (900DX) Series
Gulfstream Aerospace LP (formerly IAI) 1125 Westwind Astra, Astra SPX,
Gulfstream 100 Series
Israel Aircraft Industries (IAI) 1124 Series (Westwind 1124)
Learjet 31, 35, 36, 45 (or Learjet 40), and 55 Series
Lockheed-Georgia 3329-25 Series (731 Jetstar, Jetstar II)
Raytheon Corporate Jets (formerly British Aerospace) Hawker 800 and 850
Series
Sabreliner NA-265-65 (Sabreliner 65)
Unsafe Condition
(d) This AD results from the manufacturer's report that some HP
turbine rotor discs received improperly machined radii in the root
of the forward and aft curvic teeth during manufacture. We are
issuing this AD to prevent uncontained failure of the HP turbine
rotor assembly, which could result in 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.
TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, and -5R
Series Turbofan Engines
(f) For TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -
5BR, and -5R series turbofan engines, remove HP turbine rotor
assemblies from service containing HP turbine rotor discs, part
number (P/N) 3075772-1, having any serial number (SN) in Table 1 of
Honeywell Service Bulletin (SB) No. TFE731-72-3720, dated July 5,
2006. Use the following drawdown schedule:
(1) For HP turbine discs with 4,200 cycles-since-new (CSN) or
more on the effective date of this AD, remove HP turbine rotor
assemblies within 100 cycles-in-service (CIS) after the effective
date of this AD.
(2) For HP turbine discs with fewer than 4,200 CSN on the
effective date of this AD, remove HP turbine rotor assemblies at the
next access to the HP turbine rotor discs, but not to exceed 4,300
CSN.
TFE731-20R, -20AR, -20BR, -40, -40AR, -40R, and -60 Series Turbofan
Engines
(g) For TFE731-20R, -20AR, -20BR, -40, -40AR, -40R, and -60
series turbofan engines, remove HP turbine rotor assemblies from
service containing HP turbine rotor discs, P/N 3060841-1, having any
SN in Table 1 of Honeywell Alert SB No. TFE731-A72-5185, dated July
5, 2006. Use the following drawdown schedule:
(1) For HP turbine discs with 3,200 CSN or more on the effective
date of this AD, remove HP turbine rotor assemblies within 100 CIS
after the effective date of this AD.
(2) For HP turbine discs with fewer than 3,200 CSN on the
effective date of this AD, remove HP turbine rotor assemblies at the
next access to the turbine rotor discs, but not to exceed 3,300 CSN.
For All Engines
(h) HP turbine rotor discs removed per paragraphs (f) and (g) of
this AD must pass a curvic root radius inspection performed by
Honeywell Engines, Systems and Services, Phoenix, Arizona,
Certificate Repair Station No. ZN3R030M, before the discs are
eligible for reinstallation in an engine.
(i) For the purposes of this AD, access to the HP turbine rotor
discs is defined as the removal of the HP turbine rotor assembly
from the engine.
Alternative Methods of Compliance
(j) The Manager, Los Angeles 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
(k) Contact Joseph Costa, Aerospace Engineer, Los Angeles
Aircraft Certification Office, FAA, Transport Airplane Directorate,
3960 Paramount Blvd., Lakewood, CA 90712-4137; e-mail:
[email protected]; telephone: (562) 627-5246; fax: (562) 627-
5210, for more information about this AD.
(l) For more information regarding the engine manufacturer's
accomplishment instructions or material information, refer to
Honeywell Alert SB No. TFE731-A72-5185, dated July 5, 2006, and SB
No. TFE731-72-3720, dated July 5, 2006.
(m) Also, for technical support regarding the curvic root
dimensional inspection criteria, contact the Technical Operations
Center: telephone: (800) 601-3099 (U.S.) or (602) 365-3099
(International) and press option 9; e-mail:
[email protected]; or fax: (602) 365-3343.
Material Incorporated by Reference
(n) You must use Table 1 of Honeywell Alert Service Bulletin No.
TFE731-A72-5185, dated July 5, 2006, or Table 1 of Honeywell Service
Bulletin No. TFE731-72-3720, dated July 5, 2006, as applicable, to
determine SN applicability of HP turbine rotor discs requiring
removal by this AD. The Director of the Federal Register approved
the incorporation by reference of these service bulletins in
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Honeywell
Technical Publications and Distribution, M/S 2101-201, P.O. Box
52170, Phoenix, AZ 85072-2170; telephone: (602) 365-2493 (General
Aviation), (602) 365-5535 (Commercial Aviation), fax: (602) 365-5577
(General Aviation and Commercial Aviation) 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 January 16, 2008.
Peter A. White,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. E8-1238 Filed 1-30-08; 8:45 am]
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