[Federal Register: December 30, 2005 (Volume 70, Number 250)]
[Rules and Regulations]
[Page 77299-77301]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr30de05-2]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2001-NE-02-AD; Amendment 39-14439; AD 2005-26-18]
RIN 2120-AA64
Airworthiness Directives; Rolls-Royce Deutschland (Formerly
Rolls-Royce plc) Models Tay 650-15 and 651-54 Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is superseding an existing airworthiness directive
(AD) for Rolls-Royce Deutschland (formerly Rolls-Royce plc) (RRD)
models Tay 650-15 and 651-54 turbofan engines. That AD currently
requires borescope inspection of the high pressure compressor (HPC)
stage 12 disc assembly to detect damage caused by HPC outlet guide vane
(OGV) retaining bolt failure, and replacement of unserviceable parts
with serviceable parts. That AD also requires as terminating action,
the incorporation of a new design retention arrangement for the HPC OGV
to prevent HPC OGV retaining bolt failure. This ad requires the same
actions but extends the terminating action compliance time for Tay 650-
15 engines. This AD also includes references to later revisions of two
of the applicable RRD service bulletins (SBs). This AD results from RRD
relaxing the terminating action compliance time for Tay 650-15 engines
due to reassessment by RRD. We are issuing this AD to prevent an
uncontained failure of the HPC stage 11/12 disc spacer, which could
result in damage to the airplane.
DATES: This AD becomes effective February 3, 2006. The Director of the
Federal Register previously approved the incorporation by reference of
certain publications listed in the regulations as of February 15, 2002
(67 FR 4652, January 31, 2002).
ADDRESSES: You can get the service information identified in this AD
from Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827
Blankenfelde-Mahlow, Germany, telephone: 011 49 (0) 33-7086-1768, fax:
011 49 (0) 33-7086-3356.
You may examine the AD docket at the FAA, New England Region,
Office of the Regional Counsel, 12 New England Executive Park,
Burlington, MA. You may examine the service information, at the FAA,
New England Region, Office of the Regional Counsel, 12 New England
Executive Park, Burlington, MA.
FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine
Certification Office, FAA, Engine and Propeller Directorate, 12 New
England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-
7747; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39
with a proposed airworthiness directive (AD). The proposed AD applies
to RRD models Tay 650-15 and 651-54 turbofan engines. We published the
proposed AD in the Federal Register on July 25, 2005 (70 FR 42515).
That action proposed to require the same actions as AD 2002-01-29 but
extends the terminating action compliance time for Tay 650-15 engines.
Examining the AD Docket
You may examine the AD Docket (including any comments and service
information), by appointment, between 8 a.m. and 4:30 p.m., Monday
through Friday, except Federal holidays. See ADDRESSES for the
location.
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
There are about 400 Tay 650-15 and 651-54 turbofan engines of the
affected design in the worldwide fleet. We estimate that 105 engines
installed on airplanes of U.S. registry will be affected by this AD. We
also estimate that it will
[[Page 77300]]
take about 3 work hours per engine to perform the proposed borescope
inspection, and that the average labor rate is $65 per work hour.
Required parts will cost about $3,200 per engine. We estimate that one
third of the engines will have the parts replaced at time of engine
overhaul. We also estimate that one third of the engines will have the
parts replaced during an engine mid-life shop visit. We also estimate
that one third of the engines will have the parts replaced at an engine
shop visit dedicated for these parts replacements, at a cost of about
$90,000 per engine. Based on these figures, we estimate the total cost
of the AD to U.S. operators to be $3,600,000.
Special Flight Permits Paragraph Removed
Paragraph (f) of the current AD, AD 2002-01-29, contains a
paragraph pertaining to special flight permits. Even though this AD
does not contain a similar paragraph, we have made no changes with
regard to the use of special flight permits to operate the airplane to
a repair facility to do the work required by this AD. In July 2002, we
published a new Part 39 that contains a general authority regarding
special flight permits and airworthiness directives; see Docket No.
FAA-2004-8460, Amendment 39-9474 (69 FR 47998, July 22, 2002). Thus,
when we now supersede ADs we will not include a specific paragraph on
special flight permits unless we want to limit the use of that general
authority granted in section 39.23.
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 by
sending a request to us at the address listed under ADDRESSES. Include
``AD Docket No. 2001-NE-02-AD'' in your request.
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 removing Amendment 39-12624 (67 FR
4652, January 31, 2002) and by adding a new airworthiness directive,
Amendment 39-14439, to read as follows:
2005-26-18 Rolls-Royce Deutschland (formerly Rolls-Royce plc):
Amendment 39-14439. Docket No. 2001-NE-02-AD.
Effective Date
(a) This AD becomes effective February 3, 2006.
Affected ADs
(b) This AD supersedes AD 2002-01-29.
(c) This AD applies to Rolls-Royce Deutschland (formerly Rolls-
Royce plc) (RRD) models Tay 650-15 and 651-54 turbofan engines with
high pressure compressor (HPC) outlet guide vane (OGV) retaining
bolts part numbers (P/Ns) BLT3602, DU909, and DU818 installed. These
engines are installed on, but not limited to Boeing 727 and Fokker
F.28 Mark 0100 airplanes.
Unsafe Condition
(d) This AD results from RRD relaxing the terminating action
compliance time for Tay 650-15 engines due to reassessment by RRD.
We are issuing this AD to prevent an uncontained failure of the HPC
stage 11/12 disc spacer, 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.
Initial Inspection
(f) Perform a borescope inspection of the rear side of the stage
12 rotor disc at or before accumulating 8,000 cycles-since-new on
the OGV retaining bolts, or within 30 days from the effective date
of this AD, whichever occurs later. Use paragraph 3.A.(1) of the
Accomplishment Instructions of RRD Mandatory Service Bulletin (MSB)
Tay-72-1483, Revision 2, dated October 20, 2000, to do the
inspection. If damage is observed on the stage 12 rotor disc, remove
the engine from service.
Repetitive Inspections
(g) Thereafter, perform repetitive borescope inspections of the
rear side of the stage 12 rotor disc no earlier than 1,800 and no
later than 2,200 cycles-since-last-inspection, or no later than 18
months since-last-inspection, whichever occurs first. Use paragraph
3.A.(1) of the Accomplishment Instructions of RRD MSB Tay-72-1483,
Revision 2, dated October 20, 2000, to do the inspections. If damage
is observed on the stage 12 rotor disc, remove the engine from
service.
OGV Retaining Bolt Replacement
(h) For engines that had OGV bolts replaced with new bolts P/Ns
BLT3602, DU909, and DU818 as specified in RRD SB Tay-72-1484, dated
November 15, 1999, or Revision 1, dated December 17, 1999, the
initial and repetitive inspection requirements, based on engine
cycles-since-bolt installation, are the same as specified in
paragraphs (f) and (g) of this AD.
Terminating Action
(i) As terminating action for the inspections required by this
AD, do the following:
(1) Before November 1, 2007, for Tay 650-15 engines, and before
October 1, 2012, for Tay 651-54 engines, remove from service the
parts listed in the following Table 1:
Table 1.--Parts To Be Removed From Service
------------------------------------------------------------------------
Part No. Part name
------------------------------------------------------------------------
JR12314A............................ HPT Rotor Inner Seal Support
Assembly.
EU57842A............................ HP Compressor Outlet Guide Vane 5-
Span.
[[Page 77301]]
EU57843A............................ HP Compressor Outlet Guide Vane 6-
Span.
JR30962A............................ HP Rotor Thrust Bearing Housing
Assembly.
JR30568A............................ Diffuser Case Assembly.
KB7106.............................. Tab Washer.
EU12042............................. Retaining Lock Plate.
DU818............................... Hex Head Bolt.
------------------------------------------------------------------------
(2) Information on removing these parts from service can be
found in RRD MSB Tay-72-1498, dated October 20, 2000, or RRD MSB
Tay-72-1498, Revision 1, dated December 1, 2000, or RRD SB Tay-72-
1498, Revision 2, dated December 31, 2004.
(j) After performing the actions specified in paragraph (i) of
this AD, the inspections specified in paragraphs (f) through (h) of
this AD are no longer required.
Alternative Methods of Compliance
(k) 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
(l) Luftfhart Bundesamt airworthiness directive D-2004-365,
dated January 31, 2005, also addresses the subject of this AD.
Material Incorporated by Reference
(m) You must use Rolls-Royce Mandatory Service Bulletin Tay-72-
1483, Revision 2, dated October 20, 2000, to perform the inspections
required by this AD. The Director of the Federal Register previously
approved the incorporation by reference of this service bulletin as
of February 15, 2002 (67 FR 4652, January 31, 2002), in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51. You can get a copy from
Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827
Blankenfelde-Mahlow, Germany, telephone: 011 49 (0) 33-7086-1768,
fax: 011 49 (0) 33-7086-3356. You can review copies at the FAA, New
England Region, Office of the Regional Counsel, 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 December 23, 2005.
Carlos Pestana,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 05-24642 Filed 12-29-05; 8:45 am]
BILLING CODE 4910-13-P