[Federal Register: March 18, 2008 (Volume 73, Number 53)]
[Rules and Regulations]
[Page 14377-14378]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr18mr08-4]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-29092; Directorate Identifier 2007-NE-30-AD;
Amendment 39-15431; AD 2008-06-19]
RIN 2120-AA64
Airworthiness Directives; Honeywell International Inc. ATF3-6 and
ATF3-6A 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. ATF3-6 and ATF3-6A series turbofan engines
equipped with a certain part number (P/N) low pressure compressor (LPC)
aft shaft. This AD requires removing from service those LPC aft shafts
and installing a serviceable LPC aft shaft. This AD results from
reports of eight LPC aft shafts found cracked during fluorescent
penetrant inspection (FPI). We are issuing this AD to prevent
uncoupling and overspeed of the low pressure turbine, which could
result in uncontained engine failure and damage to the airplane.
DATES: This AD becomes effective April 22, 2008.
ADDRESSES: You can get the service information identified in this AD
from Honeywell International Inc., 111 S. 34th St., Phoenix, AZ 85034-
2802; Web site: http://portal.honeywell.com/wps/portal/aero; telephone
(800) 601-3099.
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:
joseph.costa@faa.gov; 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 International
Inc. ATF3-6 and ATF3-6A series turbofan engines equipped with a certain
part numbered LPC aft shaft. We published the proposed AD in the
Federal Register on October 5, 2007 (72 FR 56945). That action proposed
to require removing LPC aft shafts, P/N 3002070-1, from service and
installing serviceable LPC aft shafts.
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 32 ATF3-6 and ATF3-6A series
turbofan engines installed on airplanes of U.S. registry. We also
estimate that it will take about 40 work-hours per engine to perform
the actions if unscheduled, 20 work-hours per engine if during
scheduled major periodic inspection (MPI), and 1 work-hour per engine
during scheduled core zone inspection (CZI). We estimate that four
engines would be unscheduled, 14 engines would be scheduled at MPI, and
14 engines would be scheduled at CZI. The average labor rate is $80 per
work-hour. Required parts would cost about $15,000 per engine. Based on
these figures, we estimate the total cost of the proposed AD to U.S.
operators to be $516,320.
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, 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:
[[Page 14378]]
2008-06-19 Honeywell International Inc. (formerly AlliedSignal Inc.
and Garrett Turbine Engine Co.): Amendment 39-15431. Docket No. FAA-
2007-29092; Directorate Identifier 2007-NE-30-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective April
22, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Honeywell International Inc. ATF3-6-4C,
ATF3-6A-3C, and ATF3-6A-4C turbofan engines equipped with part
number (P/N) 3002070-1 low pressure compressor (LPC) Aft shaft.
These engines are installed on, but not limited to, Dassault
Aviation Fan Jet Falcon Series G (Falcon 20G/HU25), and Dassault
Aviation Mystere-Falcon 200 airplanes.
Unsafe Condition
(d) This AD results from reports of eight LPC aft shafts found
cracked during fluorescent penetrant inspection (FPI). We are
issuing this AD to prevent uncoupling and overspeed of the low
pressure turbine, which could result in uncontained engine failure
and damage to the airplane.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified in Table 1 and
Table 2 of this AD, unless the actions have already been done.
Table 1.--ATF3-6A-4C Turbofan Engines, LPC Aft Shaft Replacement
Compliance Schedule
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For ATF3-6A-4C turbofan
engines, if the cycles-since-
new (CSN) on the effective Then replace the LPC Aft shaft:
date of this AD are:
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(1) 6,500 or more CSN........ Within an additional 100 cycles-in-
service (CIS).
(2) 5,000 to 6,499 CSN....... Within an additional 800 CIS, but not
more than 6,600 CSN, whichever occurs
first.
(3) 4,000 to 4,999 CSN....... Within an additional 1,500 CIS, but not
more than 5,800 CSN, whichever occurs
first.
(4) Fewer than 4,000 CSN..... Within an additional 2,000 CIS, but not
more than 5,500 CSN, whichever occurs
first.
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Table 2.--ATF3-6-4C and ATF3-6A-3C Turbofan Engines, LPC Aft Shaft
Replacement Compliance Schedule
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For ATF3-6-4C and ATF3-6A-3C
turbofan engines, if the CSN
on the effective date of this Then replace the LPC Aft shaft:
AD are:
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(1) 4,400 or more CSN........ Within an additional 100 CIS.
(2) 3,600 to 4,399 CSN....... Within an additional 500 CIS, but not
more than 4,500 CSN, whichever occurs
first.
(3) 3,300 to 3,599 CSN....... Within an additional 700 CIS, but not
more than 4,100 CSN, whichever occurs
first.
(4) Fewer than 3,300 CSN..... Within an additional 1,000 CIS, but not
more than 4,000 CSN, whichever occurs
first.
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LPC Aft Shaft Replacement
(f) Using the compliance schedule in Table 1 or Table 2 of this
AD as applicable, remove the LPC aft shaft, P/N 3002070-1, from
service, and install a serviceable LPC aft shaft.
Definition
(g) For the purpose of this AD, a serviceable LPC aft shaft is
an aft shaft with a P/N not referenced in this AD.
Alternative Methods of Compliance
(h) 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
(i) Honeywell International Inc. Service Bulletin No. ATF3-72-
6240, Revision 1, dated May 14, 2007, pertains to the subject of
this AD.
(j) Contact Joseph Costa, Aerospace Engineer, Los Angeles
Aircraft Certification Office, FAA, Transport Airplane Directorate,
3960 Paramount Blvd., Lakewood CA 90712-4137; e-mail:
joseph.costa@faa.gov; telephone: (562) 627-5246; fax: (562) 627-
5210, for more information about this AD.
Material Incorporated by Reference
(k) None.
Issued in Burlington, Massachusetts, on March 10, 2008.
Robert J. Ganley,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. E8-5274 Filed 3-17-08; 8:45 am]
BILLING CODE 4910-13-P