
[Federal Register: October 27, 2009 (Volume 74, Number 206)]
[Rules and Regulations]               
[Page 55121-55123]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr27oc09-7]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-0037; Directorate Identifier 2007-NE-41-AD; 
Amendment 39-16052; AD 2009-22-01]
RIN 2120-AA64

 
Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG. 
(RRD) Tay 650-15 Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: We are superseding an existing airworthiness directive (AD) 
for the products listed above. That AD currently requires initial and 
repetitive inspections of the low-pressure (LP) turbine discs stage 2 
and stage 3 for corrosion, on certain serial number engines. This AD 
requires the same actions, but extends the applicability to additional 
engine serial numbers. 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:

    Strip results from some of the engines listed in the 
applicability section of this directive revealed excessively 
corroded low-pressure turbine disks stage 2 and stage 3. The 
corrosion is considered to be caused by the environment in which 
these engines are operated. Following a life assessment based on the 
strip findings it is concluded that inspections for corrosion attack 
are required. The action specified by this AD is intended to avoid a 
failure of a low-pressure turbine disk stage 2 or stage 3 due to 
potential corrosion problems which could result in uncontained 
engine failure and damage to the airplane.

We are issuing this AD to detect corrosion that could cause the stage 2 
or stage 3 disk of the LP turbine to fail and result in an uncontained 
failure of the engine.

DATES: This AD becomes effective November 12, 2009.
    We must receive comments on this AD by November 27, 2009.
    The Director of the Federal Register approved the incorporation by 
reference of Rolls-Royce Deutschland Alert Service Bulletin No. TAY-72-
A1524, Revision 2, dated June 13, 2008, listed in the AD as of November 
12, 2009.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://
www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: U.S. Department of Transportation, 1200 New Jersey 
Avenue, SE., West Building Ground Floor, Room W12-140, Washington, DC 
20590-0001.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Fax: (202) 493-2251.

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 the same as 
the Mail address provided in the ADDRESSES section. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine 
Certification Office, FAA, Engine & Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; e-mail: 
jason.yang@faa.gov; telephone (781) 238-7747; fax (781) 238-7199.
    Contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 
Dahlwitz, 15827 Blankenfelde-Mahlow, Germany; telephone 49 (0) 33-7086-
1768; fax 49 (0) 33-7086-3356, for the service information referenced 
in this AD.

SUPPLEMENTARY INFORMATION:

Discussion

    On May 5, 2008, the FAA issued AD 2008-10-14 (Amendment 39-15521 
(73 FR 29405, May 21, 2008). That AD requires initial and repetitive 
inspections of the LP turbine discs stage 2 and stage 3 for corrosion 
on 45 engines by serial number. That AD was the result of MCAI issued 
by an aviation authority of another country to identify and correct an 
unsafe condition on an aviation product. That condition, if not 
corrected, could result in the stage 2 or stage 3 disk of the LP 
turbine to fail and result in an uncontained failure of the engine.
    Since AD 2008-10-14 was issued, RRD identified 34 additional 
engines by serial number that require the same inspections. The 
European Aviation Safety Agency (EASA), which is the Technical Agent 
for the Member States of the European Community, has issued EASA 
Airworthiness Directive 2008-0122, dated July 1, 2008. That MCAI

[[Page 55122]]

extends the applicability to include the 34 additional engine serial 
numbers for inspections.
    You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    Rolls-Royce Deutschland has issued Alert Service Bulletin No. TAY-
72-A1524, Revision 2, dated June 13, 2008. The actions described in 
this service information are intended to correct the unsafe condition 
identified in the MCAI.

FAA's Determination and Requirements of This AD

    Although no airplanes that are registered in the United States use 
these RRD Tay 650-15 engines, the possibility exists that the engines 
could be used on airplanes that are registered in the United States in 
the future. The unsafe condition described previously is likely to 
exist or develop on other RRD Tay 650-15 engines of the same type 
design. We are issuing this AD to detect corrosion that could cause the 
stage 2 or stage 3 disk of the LP turbine to fail and result in an 
uncontained failure of the engine. This AD requires initial and 
repetitive inspections of the LP turbine discs stage 2 and stage 3 for 
corrosion on certain serial number engines. You must use the service 
information described previously to perform the actions required by 
this AD.

FAA's Determination of the Effective Date

    Since no domestic operators use this product, notice and 
opportunity for public comment before issuing this AD are unnecessary. 
Therefore, we are adopting this regulation immediately.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not precede it by notice and opportunity for public 
comment. We invite you to send any written relevant data, views, or 
arguments about this AD. Send your comments to an address listed under 
the ADDRESSES section. Include ``Docket No. FAA-2007-0037; Directorate 
Identifier 2007-NE-41-AD'' at the beginning of your comments. We 
specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this AD. We will consider all 
comments received by the closing date and may amend this AD because of 
those comments.
    We will post all comments we receive, without change, to http://
www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact 
with FAA personnel concerning this AD. Using the search function of the 
Web site, anyone can find and read the comments in any of our dockets, 
including, if provided, the name of the individual who sent the comment 
(or signed the comment on behalf of an association, business, labor 
union, etc.). You may review the DOT's complete Privacy Act Statement 
in the Federal Register published on April 11, 2000 (65 FR 19477-78).

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.

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 removing Amendment 39-15521 (73 FR 
29405, May 21, 2008), and by adding a new airworthiness directive, 
Amendment 39-16052, to read as follows:

2009-22-01 Rolls-Royce Deutschland Ltd & Co KG (RRD) (formerly 
Rolls-Royce plc, Derby, England): Amendment 39-16052. Docket No. 
FAA-2007-0037; Directorate Identifier 2007-NE-41-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective November 
12, 2009.

Affected ADs

    (b) This AD supersedes AD 2008-10-14, Amendment 39-15521.

Applicability

    (c) This AD applies to RRD Tay 650-15 turbofan engines that have 
a serial number listed in Table 1 or Table 2 of this AD, and low-
pressure (LP) turbine module M05300AA installed. These engines are 
installed on, but not limited to, Fokker F28 Mark 0100 airplanes.

 Table 1--Affected Tay 650-15 Engines by Serial Number (Carried Forward
                           From AD 2008-10-14)
------------------------------------------------------------------------
                          Engine Serial Number
-------------------------------------------------------------------------
17251
17255
17256
17273
17275
17280
17281
17282
17300
17301
17327
17332
17365
17393
17437
17443
17470
17520

[[Page 55123]]


17521
17523
17539
17542
17556
17561
17562
17563
17580
17581
17612
17618
17635
17637
17645
17661
17686
17699
17701
17702
17736
17737
17738
17739
17741
17742
17808
------------------------------------------------------------------------


Table 2--Affected Tay 650-15 Engines by Serial Number (Added New in This
                                   AD)
------------------------------------------------------------------------
                          Engine Serial Number
-------------------------------------------------------------------------
17249
17303
17358
17370
17425
17426
17433
17438
17445
17446
17460
17474
17478
17490
17491
17517
17518
17522
17534
17535
17536
17538
17540
17541
17552
17553
17585
17613
17723
17724
17740
17759
17760
17807
------------------------------------------------------------------------

Reason

    (d) Strip results from some of the engines listed in the 
applicability section of this directive revealed excessively 
corroded low-pressure turbine disks stage 2 and stage 3. The 
corrosion is considered to be caused by the environment in which 
these engines are operated. Following a life assessment based on the 
strip findings it is concluded that inspections for corrosion attack 
are required. The action specified by this AD is intended to avoid a 
failure of a low-pressure turbine disk stage 2 or stage 3 due to 
potential corrosion problems which could result in uncontained 
engine failure and damage to the airplane.
    We are issuing this AD to detect corrosion that could cause the 
stage 2 or stage 3 disk of the LP turbine to fail and result in an 
uncontained failure of the engine.

Actions and Compliance

    (e) Unless already done, do the following actions.
    (1) Prior to accumulating 11,700 flight cycles (FC) since new, 
and thereafter at intervals not exceeding 11,700 FC of the engine, 
inspect the LP turbine disks stage 2 and stage 3 for corrosion in 
accordance with RRD Alert Service Bulletin No. TAY-72-A1524, 
Revision 2, dated June 13, 2008.
    (2) For engines that already exceed 11,700 FC on the effective 
date of this AD, perform the inspection within 90 days after the 
effective date of this AD.
    (3) When, during any of the inspections as required by paragraph 
(e)(1) of this directive, corrosion is found, replace the affected 
parts. The RRD TAY 650 Engine Manual--E-TAY-3RR, Tasks 72-52-23-200-
000 and 72-52-24-200-000 contains guidance on performing the 
inspection for corrosion and rejection criteria.

Previous Credit

    (f) Initial inspections done before the effective date of this 
AD on LP turbine disks stage 2 and stage 3 listed in Table 1 of this 
AD using RRD Alert Service Bulletin No. TAY-72-A1524, Revision 1, 
dated September 1, 2006, comply with the initial inspection 
requirements specified in this AD.

Alternative Methods of Compliance (AMOCs)

    (g) 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

    (h) Refer to European Aviation Safety Agency AD 2008-0122, dated 
July 1, 2008, for related information.
    (i) Contact Jason Yang, Aerospace Engineer, Engine Certification 
Office, FAA, Engine & Propeller Directorate, 12 New England 
Executive Park, Burlington, MA 01803; e-mail: jason.yang@faa.gov; 
telephone (781) 238-7747; fax (781) 238-7199, for more information 
about this AD.

Material Incorporated by Reference

    (j) You must use Rolls-Royce Deutschland Alert Service Bulletin 
No. TAY-72-A1524, Revision 2, dated June 13, 2008, to do the actions 
required by this AD.
    (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 
Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlwitz, 15827 
Blankenfelde-Mahlow, Germany; telephone 49 (0) 33-7086-1768; fax 49 
(0) 33-7086-3356.
    (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 October 8, 2009.
Diane S. Romanosky,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. E9-25031 Filed 10-26-09; 8:45 am]

BILLING CODE 4910-13-P
