Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Formerly Rolls-Royce plc) Dart 528, 529, 532, 535, 542, and 552 Series Turbofan Engines, 53610-53612 [E6-15049]

Download as PDF 53610 Federal Register / Vol. 71, No. 176 / Tuesday, September 12, 2006 / Proposed Rules The exemptions proposed here are standard law enforcement and national security exemptions exercised by a large number of Federal law enforcement and intelligence agencies. In appropriate circumstances, where compliance would not appear to interfere with or adversely affect the law enforcement purposes of this system and the overall law enforcement process, the applicable exemptions may be waived. List of Subjects in 6 CFR Part 5 Classified information, Privacy, Freedom of information. For the reasons stated in the preamble, DHS proposes to amend Chapter I of Title 6, Code of Federal Regulations, as follows: PART 5—DISCLOSURE OF RECORDS AND INFORMATION 1. The authority citation for part 5 continues to read as follows: Authority: Pub. L. 107–296, 116 Stat. 2135, 6 U.S.C. 101 et seq.; 5 U.S.C. 301. Subpart A also issued under 5 U.S.C. 552. 2. At the end of Appendix C to Part 5, add the following new paragraph: Appendix C to part 5—DHS Systems of Records Exempt From the Privacy Act sroberts on PROD1PC70 with PROPOSALS * * * * * 4. DHS–OS–001, Office of Security File System. This system and its records are used in the management and implementation of Office of Security programs and activities that safeguard and support the protection of the Department’s personnel, property, facilities, and information. Pursuant to 5 U.S.C. 552a(k)(1) and (k)(2), this system is exempt from the following provisions of the Privacy Act, subject to the limitations set forth in those subsections: 5 U.S.C. 552a(c)(3), (d), (e)(1), (e)(4)(G), (e)(4)(H), (I) and (f). Exemptions from these particular subsections are justified, on a case-by-case basis to be determined at the time a request is made, for the following reasons: (a) From subsection (c)(3) (Accounting for Disclosures) because release of the accounting of disclosures could alert the subject of an investigation into an actual or potential criminal, civil, or regulatory violation, to the existence of the investigation, which in some cases may be classified, and which could reveal investigative interest on the part of DHS or the Office of Security. Disclosure of the accounting would therefore present a serious impediment to law enforcement efforts and/ or efforts to preserve national security. Disclosure of the accounting would also permit the individual who is the subject of a record to impede the investigation, tamper with witnesses or evidence, and avoid detection or apprehension, which would undermine the entire investigative process. (b) From subsection (d) (Access to and Amendment of Records) because access to the records contained in this system of records could inform the subject of an VerDate Aug<31>2005 16:12 Sep 11, 2006 Jkt 208001 investigation, which in some cases may be classified, and prematurely reveal investigative interest on the part of DHS or another agency. Access to the records could permit the individual who is the subject of a record to impede the investigation, tamper with witnesses or evidence, and avoid detection or apprehension. Amendment of the records could interfere with ongoing investigations and law enforcement activities and would impose an impossible administrative burden by requiring investigations to be continuously reinvestigated. In addition, permitting access and amendment to such information could disclose security-sensitive information that could be detrimental to homeland security. (c) From subsection (e)(1) (Relevancy and Necessity of Information) because in the course of investigations into potential violations of national security or information breaches, the accuracy of information obtained or introduced occasionally may be unclear or the information may not be strictly relevant or necessary to a specific investigation. In the interests of effective law enforcement and for the protection of national security, it is appropriate to retain all information that may aid in establishing patterns of unlawful activity. (d) From subsections (e)(4)(G), (H) and (I) (Agency Requirements), and (f) (Agency Rules) because portions of this system are exempt from the access and amendment provisions of subsection (d). (e) From subsection (g) to the extent that the system is exempt from other specific subsections of the Privacy Act. Dated: September 1, 2006. Hugo Teufel III, Chief Privacy Officer. [FR Doc. E6–15046 Filed 9–11–06; 8:45 am] BILLING CODE 4410–10–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2006–25272; Directorate Identifier 2006–NE–16–AD] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Formerly Rolls-Royce plc) Dart 528, 529, 532, 535, 542, and 552 Series Turbofan Engines Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc) (RRD) Dart 528, 529, 532, 535, 542, and 552 series PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 turbofan engines. This proposed AD would require repetitive inspections of high pressure turbine (HPT) blade platforms and shrouds, and reworking the engines if the inspections reveal excessive gaps between blade shrouds. This proposed AD results from reports of HPT disk rim failures. We are proposing this AD to prevent HPT disk rim failures resulting in the release of portions of the HPT disk, uncontained engine failure, and damage to the airplane. We must receive any comments on this proposed AD by November 13, 2006. ADDRESSES: Use one of the following addresses to comment on this proposed AD. • DOT Docket Web site: Go to https:// dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://www.regulations.gov and follow the instructions for sending your comments electronically. • Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL–401, Washington, DC 20590– 0001. • Fax: (202) 493–2251. • Hand Delivery: Room PL–401 on the plaza level of the Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. Contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, D–15827 Dahlewitz, Germany; telephone 49 (0) 33–7086–1768; fax 49 (0) 33–7086–3356 for the service information identified in this proposed AD. FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; telephone (781) 238–7747; fax (781) 238–7199). SUPPLEMENTARY INFORMATION: DATES: Comments Invited We invite you to send us any written relevant data, views, or arguments regarding this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2006–25272; Directorate Identifier 2006–NE–16–AD’’ in the subject line of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments received by the closing date and may amend the E:\FR\FM\12SEP1.SGM 12SEP1 Federal Register / Vol. 71, No. 176 / Tuesday, September 12, 2006 / Proposed Rules proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of the DMS Web site, anyone can find and read the comments in any of our dockets, including 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) or you may visit https:// dms.dot.gov. dimensional inspection and rework, if necessary, of the HPT blade platform and shroud. The LBA classified this SB as mandatory and issued airworthiness directive 2003–217, dated August 7, 2003, in order to ensure the airworthiness of these engines in Germany. Examining the AD Docket You may examine the docket that contains the proposal, any comments received, and any final disposition in person at the DMS Docket Offices between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Office (telephone (800) 647– 5227) is on the plaza level of the Department of Transportation Nassif Building at the street address stated in ADDRESSES. Comments will be available in the AD docket shortly after the DMS receives them. These engines, manufactured in the United Kingdom and transferred to Germany, are type-certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. In keeping with this bilateral airworthiness agreement, the LBA kept us informed of the situation described above. We have examined the LBA’s findings, reviewed all available information, and determined that AD action is necessary for products of this type design that are certificated for operation in the United States. We are proposing this AD, that would require repetitive inspections of HPT blade platforms and shrouds, and reworking the engines if the inspections reveal excessive gaps between blade shrouds. The proposed AD would require you to use the service information described previously to perform these actions. sroberts on PROD1PC70 with PROPOSALS Discussion The Luftfahrt-Bundesamt (LBA), which is the airworthiness authority for Germany, recently notified us that an unsafe condition may exist on RRD Dart 528, 529, 532, 535, 542, and 552 turbofan engines. The LBA advises that they received reports of HPT disk rim failures, some of which resulted in release of portions of the HPT disk. These failures resulted from high stress levels in the HPT disk bucket groove due to blade vibration. Excessive gaps between the blade shroud and platform induced the damaging HPT blade vibration. The gaps can increase if wear occurs between the blade shroud and platform abutment faces. We are proposing this AD to prevent HPT disk rim failures resulting in the release of portions of the HPT disk, an uncontained engine failure, and damage to the airplane. Relevant Service Information We have reviewed and approved the technical contents of RRD DART Service Bulletin (SB) Da72–543, dated July 11, 2003, and RRD Repair Instruction, ‘‘Restoration of HPT Blade Platform and Shroud, DRS 611,’’ dated January 20, 2005, that describe procedures for a VerDate Aug<31>2005 16:12 Sep 11, 2006 Jkt 208001 Differences Between This Proposed AD and the Manufacturer’s Service Information This proposed AD shortens the initial inspection of the HPT blade platform and shroud to no more than 1,500 flight hours from the date of issue of this AD, if the engine has not been inspected or reworked to the DRS 611 standard. FAA’s Determination and Requirements of the Proposed AD Costs of Compliance We estimate that this proposed AD would affect about 30 RRD Dart 528, 529, 532, 535, 542, and 552 series turbofan engines installed on airplanes of U.S. registry. We also estimate that it would take about 22 work-hours per engine to perform the proposed actions, and that the average labor rate is $80 per work-hour. No parts are required. Based on these figures, we estimate the total cost of the proposed AD to U.S. operators to be $52,800. 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 PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 53611 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 proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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 the proposed regulation: 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. Would 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 proposed AD. See the ADDRESSES section for a location to examine the regulatory evaluation. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. The Proposed Amendment Under the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc): Docket No. E:\FR\FM\12SEP1.SGM 12SEP1 53612 Federal Register / Vol. 71, No. 176 / Tuesday, September 12, 2006 / Proposed Rules FAA–2006–25272; Directorate Identifier 2006–NE–16–AD. DEPARTMENT OF THE TREASURY Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this airworthiness directive (AD) action by November 13, 2006. Alcohol and Tobacco Tax and Trade Bureau 27 CFR Part 9 [Notice No. 63] RIN 1513–AB20 Affected ADs (b) None. Proposed Establishment of the Swan Creek Viticultural Area (2005R–414P) Applicability (c) This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Dart 528, 529, 532, 535, 542, and 552 series turbofan engines. These engines are installed on, but not limited to, Hawker Siddeley, Argosy AW.650, Fairchild Hiller F–27, F–27A, F– 27B, F–27F, F–27G, F–27J, FH–227, FH– 227B, FH–227C, FH–227D, FH–227E, Fokker F.27 all marks; British Aircraft Corporation Viscount 744, 745D and 810; and Gulfstream G–159 airplanes. Unsafe Condition (d) This AD results from reports of high pressure turbine (HPT) disk rim failures. We are issuing this AD to prevent HPT disk rim failures resulting in the release of portions of the HPT disk, 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 unless the actions have already been done. (f) Using RRD DART Service Bulletin (SB) Da72–543, dated July 11, 2003, and the scheme detailed in RRD Repair Instruction, ‘‘Restoration of HPT Blade Platform and Shroud, DRS 611,’’ dated January 20, 2005, inspect and repair HPT blade platforms and shroud abutment faces by weld build-up: (1) After no more than 1,500 flight hours from the date of issue of this AD, if the engine has not been previously inspected or reworked to the DRS 611 standard; (2) Each time new blades are installed; and (3) Before exceeding 7,400 hours since last HPT blade rework. Alternative Methods of Compliance (g) 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 sroberts on PROD1PC70 with PROPOSALS (h) LBA airworthiness directive 2003–217, dated August 7, 2003, also addresses the subject of this AD. Issued in Burlington, Massachusetts, on September 6, 2006. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E6–15049 Filed 9–11–06; 8:45 am] BILLING CODE 4910–13–P VerDate Aug<31>2005 16:12 Sep 11, 2006 Jkt 208001 Alcohol and Tobacco Tax and Trade Bureau, Treasury. ACTION: Notice of proposed rulemaking. AGENCY: SUMMARY: The Alcohol and Tobacco Tax and Trade Bureau proposes to establish the 96,000-acre Swan Creek viticultural area in Wilkes, Yadkin, and Iredell Counties, North Carolina. We designate viticultural areas to allow vintners to better describe the origin of their wines and to allow consumers to better identify wines they may purchase. We invite comments on this proposed addition to our regulations. DATES: We must receive written comments on or before November 13, 2006. ADDRESSES: You may send comments to any of the following addresses: • Director, Regulations and Rulings Division, Alcohol and Tobacco Tax and Trade Bureau, Attn: Notice No. 63, P.O. Box 14412, Washington, DC 20044– 4412. • 202–927–8525 (facsimile). • nprm@ttb.gov (e-mail). • https://www.ttb.gov/wine/ wine_rulemaking.shtml. An online comment form is posted with this notice on our Web site. • https://www.regulations.gov (Federal e-rulemaking portal; follow instructions for submitting comments). You may view copies of this notice, the petition, the appropriate maps, and any comments we receive about this proposal by appointment at the TTB Information Resource Center, 1310 G Street, NW., Washington, DC 20220. To make an appointment, call 202–927– 2400. You may also access copies of the notice and comments online at https:// www.ttb.gov/wine/ wine_rulemaking.shtml. See the Public Participation section of this notice for specific instructions and requirements for submitting comments, and for information on how to request a public hearing. FOR FURTHER INFORMATION CONTACT: N.A. Sutton, Regulations and Rulings Division, Alcohol and Tobacco Tax and Trade Bureau, 925 Lakeville Street, No. 158, Petaluma, CA 94952; telephone 415–271–1254. PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 SUPPLEMENTARY INFORMATION: Background on Viticultural Areas TTB Authority Section 105(e) of the Federal Alcohol Administration Act (the FAA Act, 27 U.S.C. 201 et seq.) requires that alcohol beverage labels provide consumers with adequate information regarding product identity and prohibits the use of misleading information on those labels. The FAA Act also authorizes the Secretary of the Treasury to issue regulations to carry out its provisions. The Alcohol and Tobacco Tax and Trade Bureau (TTB) administers these regulations. Part 4 of the TTB regulations (27 CFR part 4) allows the establishment of definitive viticultural areas and the use of their names as appellations of origin on wine labels and in wine advertisements. Part 9 of the TTB regulations (27 CFR part 9) contains the list of approved viticultural areas. Definition Section 4.25(e)(1)(i) of the TTB regulations (27 CFR 4.25(e)(1)(i)) defines a viticultural area for American wine as a delimited grape-growing region distinguishable by geographic features, the boundaries of which have been recognized and defined in part 9 of the regulations. These designations allow vintners and consumers to attribute a given quality, reputation, or other characteristic of a wine made from grapes grown in an area to its geographic origin. The establishment of viticultural areas allows vintners to describe more accurately the origin of their wines to consumers and helps consumers to identify wines they may purchase. Establishment of a viticultural area is neither an approval nor an endorsement by TTB of the wine produced in that area. Requirements Section 4.25(e)(2) of the TTB regulations outlines the procedure for proposing an American viticultural area and provides that any interested party may petition TTB to establish a grapegrowing region as a viticultural area. Section 9.3(b) of the TTB regulations requires the petition to include— • Evidence that the proposed viticultural area is locally and/or nationally known by the name specified in the petition; • Historical or current evidence that supports setting the boundary of the proposed viticultural area as the petition specifies; • Evidence relating to the geographical features, such as climate, E:\FR\FM\12SEP1.SGM 12SEP1

Agencies

[Federal Register Volume 71, Number 176 (Tuesday, September 12, 2006)]
[Proposed Rules]
[Pages 53610-53612]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E6-15049]


=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-25272; Directorate Identifier 2006-NE-16-AD]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG 
(Formerly Rolls-Royce plc) Dart 528, 529, 532, 535, 542, and 552 Series 
Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc) 
(RRD) Dart 528, 529, 532, 535, 542, and 552 series turbofan engines. 
This proposed AD would require repetitive inspections of high pressure 
turbine (HPT) blade platforms and shrouds, and reworking the engines if 
the inspections reveal excessive gaps between blade shrouds. This 
proposed AD results from reports of HPT disk rim failures. We are 
proposing this AD to prevent HPT disk rim failures resulting in the 
release of portions of the HPT disk, uncontained engine failure, and 
damage to the airplane.

DATES: We must receive any comments on this proposed AD by November 13, 
2006.

ADDRESSES: Use one of the following addresses to comment on this 
proposed AD.
     DOT Docket Web site: Go to https://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Government-wide rulemaking Web site: Go to https://
www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, 
Washington, DC 20590-0001.
     Fax: (202) 493-2251.
     Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    Contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, D-15827 
Dahlewitz, Germany; telephone 49 (0) 33-7086-1768; fax 49 (0) 33-7086-
3356 for the service information identified in this proposed AD.

FOR FURTHER INFORMATION CONTACT: Jason Yang, Aerospace Engineer, Engine 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; telephone (781) 238-7747; 
fax (781) 238-7199).

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send us any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2006-25272; 
Directorate Identifier 2006-NE-16-AD'' in the subject line of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the proposed AD. We will 
consider all comments received by the closing date and may amend the

[[Page 53611]]

proposed AD in light of those comments.
    We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this proposed AD. Using the search function of the 
DMS Web site, anyone can find and read the comments in any of our 
dockets, including 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) or you 
may visit https://dms.dot.gov.

Examining the AD Docket

    You may examine the docket that contains the proposal, any comments 
received, and any final disposition in person at the DMS Docket Offices 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Office (telephone (800) 647-5227) is on the plaza 
level of the Department of Transportation Nassif Building at the street 
address stated in ADDRESSES. Comments will be available in the AD 
docket shortly after the DMS receives them.

Discussion

    The Luftfahrt-Bundesamt (LBA), which is the airworthiness authority 
for Germany, recently notified us that an unsafe condition may exist on 
RRD Dart 528, 529, 532, 535, 542, and 552 turbofan engines. The LBA 
advises that they received reports of HPT disk rim failures, some of 
which resulted in release of portions of the HPT disk. These failures 
resulted from high stress levels in the HPT disk bucket groove due to 
blade vibration. Excessive gaps between the blade shroud and platform 
induced the damaging HPT blade vibration. The gaps can increase if wear 
occurs between the blade shroud and platform abutment faces. We are 
proposing this AD to prevent HPT disk rim failures resulting in the 
release of portions of the HPT disk, an uncontained engine failure, and 
damage to the airplane.

Relevant Service Information

    We have reviewed and approved the technical contents of RRD DART 
Service Bulletin (SB) Da72-543, dated July 11, 2003, and RRD Repair 
Instruction, ``Restoration of HPT Blade Platform and Shroud, DRS 611,'' 
dated January 20, 2005, that describe procedures for a dimensional 
inspection and rework, if necessary, of the HPT blade platform and 
shroud. The LBA classified this SB as mandatory and issued 
airworthiness directive 2003-217, dated August 7, 2003, in order to 
ensure the airworthiness of these engines in Germany.

Differences Between This Proposed AD and the Manufacturer's Service 
Information

    This proposed AD shortens the initial inspection of the HPT blade 
platform and shroud to no more than 1,500 flight hours from the date of 
issue of this AD, if the engine has not been inspected or reworked to 
the DRS 611 standard.

FAA's Determination and Requirements of the Proposed AD

    These engines, manufactured in the United Kingdom and transferred 
to Germany, are type-certificated for operation in the United States 
under the provisions of section 21.29 of the Federal Aviation 
Regulations (14 CFR 21.29) and the applicable bilateral airworthiness 
agreement. In keeping with this bilateral airworthiness agreement, the 
LBA kept us informed of the situation described above. We have examined 
the LBA's findings, reviewed all available information, and determined 
that AD action is necessary for products of this type design that are 
certificated for operation in the United States. We are proposing this 
AD, that would require repetitive inspections of HPT blade platforms 
and shrouds, and reworking the engines if the inspections reveal 
excessive gaps between blade shrouds. The proposed AD would require you 
to use the service information described previously to perform these 
actions.

Costs of Compliance

    We estimate that this proposed AD would affect about 30 RRD Dart 
528, 529, 532, 535, 542, and 552 series turbofan engines installed on 
airplanes of U.S. registry. We also estimate that it would take about 
22 work-hours per engine to perform the proposed actions, and that the 
average labor rate is $80 per work-hour. No parts are required. Based 
on these figures, we estimate the total cost of the proposed AD to U.S. 
operators to be $52,800.

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 the proposed 
regulation:
    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. Would 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 proposed AD. See the ADDRESSES section for a location 
to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Under the authority delegated to me by the Administrator, the 
Federal Aviation Administration proposes to amend 14 CFR part 39 as 
follows:

PART 39--AIRWORTHINESS DIRECTIVES

    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]

    2. The FAA amends Sec.  39.13 by adding the following new 
airworthiness directive:

Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc): 
Docket No.

[[Page 53612]]

FAA-2006-25272; Directorate Identifier 2006-NE-16-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this airworthiness directive (AD) action by November 13, 
2006.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) 
Dart 528, 529, 532, 535, 542, and 552 series turbofan engines. These 
engines are installed on, but not limited to, Hawker Siddeley, 
Argosy AW.650, Fairchild Hiller F-27, F-27A, F-27B, F-27F, F-27G, F-
27J, FH-227, FH-227B, FH-227C, FH-227D, FH-227E, Fokker F.27 all 
marks; British Aircraft Corporation Viscount 744, 745D and 810; and 
Gulfstream G-159 airplanes.

Unsafe Condition

    (d) This AD results from reports of high pressure turbine (HPT) 
disk rim failures. We are issuing this AD to prevent HPT disk rim 
failures resulting in the release of portions of the HPT disk, 
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 unless the 
actions have already been done.
    (f) Using RRD DART Service Bulletin (SB) Da72-543, dated July 
11, 2003, and the scheme detailed in RRD Repair Instruction, 
``Restoration of HPT Blade Platform and Shroud, DRS 611,'' dated 
January 20, 2005, inspect and repair HPT blade platforms and shroud 
abutment faces by weld build-up:
    (1) After no more than 1,500 flight hours from the date of issue 
of this AD, if the engine has not been previously inspected or 
reworked to the DRS 611 standard;
    (2) Each time new blades are installed; and
    (3) Before exceeding 7,400 hours since last HPT blade rework.

Alternative Methods of Compliance

    (g) 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

    (h) LBA airworthiness directive 2003-217, dated August 7, 2003, 
also addresses the subject of this AD.

    Issued in Burlington, Massachusetts, on September 6, 2006.
Peter A. White,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
 [FR Doc. E6-15049 Filed 9-11-06; 8:45 am]
BILLING CODE 4910-13-P
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