Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Tay 650-15 and Tay 651-54 Turbofan Engines, 26282-26284 [E6-6737]

Download as PDF 26282 Federal Register / Vol. 71, No. 86 / Thursday, May 4, 2006 / Proposed Rules DEPARTMENT OF TRANSPORTATION 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: Federal Aviation Administration 14 CFR Part 39 [Docket No. 99–NE–61–AD] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Tay 650–15 and Tay 651–54 Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). mstockstill on PROD1PC68 with PROPOSALS AGENCY: SUMMARY: The FAA proposes to supersede an existing airworthiness directive (AD) for Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650–15 turbofan engines. That AD currently establishes cyclic life limits for certain part number (P/N) stage 1 high pressure turbine (HPT) discs and stage 1 (LPT) discs operating under certain flight plan profiles. This proposed AD would add Tay 651–54 turbofan engines to the applicability. This proposed AD would also require removing certain stage 1 HPT discs and stage 1 LPT discs at reduced cyclic life limits using a drawdown schedule. This proposed AD results from RRD updating their low-cycle-fatigue (LCF) analysis for stage 1 HPT discs and stage 1 LPT discs and reducing their cyclic life limits. We are proposing this AD to prevent cracks leading to turbine disc failure, which could result in an uncontained engine failure and damage to the airplane. DATES: We must receive any comments on this proposed AD by July 3, 2006. ADDRESSES: Use one of the following addresses to comment on this proposed AD: • By mail: Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. 99–NE–61– AD, 12 New England Executive Park, Burlington, MA 01803. • By fax: (781) 238–7055. • By e-mail: 9-aneadcomment@faa.gov. You can get the service information identified in this proposed AD from Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15872 BlankenfeldeMahlow, Germany, telephone 49–0–33– 7086–1768; fax 49–0–33–7086–3356. You may examine the AD docket, by appointment, at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA. VerDate Aug<31>2005 17:01 May 03, 2006 Jkt 208001 FOR FURTHER INFORMATION CONTACT: Comments Invited We invite you to send any written relevant data, views, or arguments regarding this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘AD Docket No. 99– NE–61–AD’’ in the subject line of your comments. If you want us to acknowledge receipt of your mailed comments, send us a self-addressed, stamped postcard with the docket number written on it; we will datestamp your postcard and mail it back to you. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. If a person contacts us verbally, and that contact relates to a substantive part of this proposed AD, we will summarize the contact and place the summary in the docket. We will consider all comments received by the closing date and may amend the proposed AD in light of those comments. 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. Discussion On April 7, 2000, we issued AD 2000– 08–01, Amendment 39–11687 (65 FR 20714, April 18, 2000). That AD establishes Tay 650–15 cyclic life limits for stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 LPT discs, P/N JR32318A operating under certain flight plan profiles. The LuftfahrtBundesamt (LBA), which is the airworthiness authority for Germany, notified us that an unsafe condition may exist on Tay 650–15 and Tay 651–54 turbofan engines. The LBA advises that the current cyclic life limits for stage 1 HPT discs, P/N JR32013 and P/N JR33838, installed in Tay 650–15 and Tay 651–54 turbofan engines are too high. Actions Since AD 2000–08–01 Was Issued Since AD 2000–08–01 was issued, RRD updated their LCF analysis for stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 LPT discs, PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 P/N JR32318A, installed in Tay 650–15 and Tay 651–54 turbofan engines. RollsRoyce Deutschland issued service information based on the LCF analysis. Special Flight Permits Paragraph Removed Paragraph (d) of the current AD, AD 2000–08–01, contains a paragraph pertaining to special flight permits. Even though this proposed 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 proposed 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. Relevant Service Information We have reviewed and approved the technical contents of RRD Alert Service Bulletin (ASB) No. Tay–72–A1676, Revision 1, dated August 16, 2005, that contains updated cyclic life limits. That ASB also describes procedures for calculating and re-establishing the achieved cyclic life of discs that have been exposed to different flight plans. That ASB also contains cyclic life limit drawdown schedules for discs in engine flight plan profiles B, C, and D. The LBA classified this ASB as mandatory. With European Aviation Safety Agency approval, the LBA issued AD No. D– 2005–252R1, dated August 31, 2005, to ensure the airworthiness of these Tay 650–15 and Tay 651–54 turbofan engines in Germany. Bilateral Agreement Information These engine models are manufactured in Germany and 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 has kept the FAA informed of the situation described above. We have examined the findings of the LBA, 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. E:\FR\FM\04MYP1.SGM 04MYP1 Federal Register / Vol. 71, No. 86 / Thursday, May 4, 2006 / Proposed Rules FAA’s Determination and Requirements of the Proposed AD We have evaluated all pertinent information and identified an unsafe condition that is likely to exist or develop on other products of this same type design. Therefore, we are proposing this AD, which would require, for Tay 650–15 and Tay 651–54 engines: • Calculating and re-establishing the achieved cyclic life of stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 LPT discs, P/N JR32318A, that have been exposed to different flight plans; and • Removing those stage 1 HPT discs and stage 1 LPT discs operated under engine flight plans A, B, C, and D at reduced cyclic life limits, using a drawdown schedule for certain discs and profiles. The proposed AD would require that you do these actions using the service information described previously. Costs of Compliance We estimate that this proposed AD would affect 50 Tay 650–15 and Tay 651–54 turbofan engines installed on airplanes of U.S. registry. We also estimate that it would take about one workhour per engine to calculate and reestablish the achieved cyclic life for a disc, and that the average labor rate is $80 per workhour. We estimate that the prorated cost of the life reduction per engine would be $15,000. Based on these figures, we estimate that if all of the engines required calculating and reestablishing achieved cyclic life, the total cost of the proposed AD to U.S. operators would be $752,000. mstockstill on PROD1PC68 with PROPOSALS 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. 15:42 May 03, 2006 Jkt 208001 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 summary of the costs to comply with this proposal 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. 99– NE–61–AD’’ in your request. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. The Proposed Amendment Accordingly, 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 Authority for This Rulemaking VerDate Aug<31>2005 Regulatory Findings 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 removing Amendment 39–11687 (65 FR 20714, April 18, 2000) and by adding a new airworthiness directive, to read as follows: Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc): Docket No. 99–NE–61–AD. Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this airworthiness directive (AD) action by July 3, 2006. Affected ADs (b) This AD supersedes AD 2000–08–01, Amendment 39–11687. PO 00000 Frm 00017 Fmt 4702 Sfmt 4702 26283 Applicability (c) This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650–15 and Tay 651–54 turbofan engines with stage 1 high pressure turbine (HPT) discs, part number (P/N) JR32013 and P/N JR33838, and stage 1 low pressure turbine (LPT) discs, P/ N JR32318A, installed. These engines are installed on, but not limited to, Fokker Model F.28 Mark 0100, and Boeing 727–100 series airplanes modified in accordance with Supplemental Type Certificate (STC) SA8472SW (727 QF). Unsafe Condition (d) This AD results from RRD updating their low-cycle-fatigue (LCF) analysis for stage 1 HPT discs and stage 1 LPT discs and reducing their cyclic life limits. We are issuing this AD to prevent cracks leading to turbine disc failure, which could result in an 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) Information on the referenced engine flight plan profiles A, B, C, and D can be found in RRD Tay Engine Manual, Section 70–01–10. Calculating and Re-Establishing Within 30 Days, the Achieved Cyclic Life of a Stage 1 HPT or Stage 1 LPT Disc Previously Exposed to Different Flight Plan(s) (g) If a stage 1 HPT disc or stage 1 LPT disc was previously exposed to flight plan(s) different than the currently operated flight plan: (1) You must calculate and re-establish the achieved cyclic life for that disc, within 30 days after the effective date of this AD. (2) Use paragraphs 3.A. through 3.D.(2)(c) of Accomplishment Instructions of RRD Alert Service Bulletin (ASB) No. Tay–72–A1676, Revision 1, dated August 16, 2005, to calculate and re-establish the achieved cyclic life. After an Engine Flight Plan Changeover, Calculating and Re-Establishing Within 30 Days, the Achieved Cyclic Life of Stage 1 HPT Discs and Stage 1 LPT Discs (h) After an engine has a flight plan changeover: (1) You must calculate and re-establish the achieved cyclic life for the stage 1 HPT disc and stage 1 LPT disc, within 30 days after the flight plan changeover. (2) Use paragraphs 3.A. through 3.D.(2)(c) of Accomplishment Instructions of RRD ASB No. Tay–72–A1676, Revision 1, dated August 16, 2005, to calculate and re-establish the achieved cyclic life. Removal of Stage 1 HPT Discs and Stage 1 LPT Discs From Service Tay 650–15 Engine Flight Plan Profile A (i) Remove from service Tay 650–15 stage 1 HPT discs and stage 1 LPT discs operated under flight plan profile A, before accumulating 23,000 cycles-since-new (CSN), and replace with serviceable parts. E:\FR\FM\04MYP1.SGM 04MYP1 26284 Federal Register / Vol. 71, No. 86 / Thursday, May 4, 2006 / Proposed Rules Tay 650–15 Engine Flight Plan Profile B DEPARTMENT OF TRANSPORTATION (j) Remove from service Tay 650–15 stage 1 HPT discs operated under flight plan profile B and replace with serviceable parts: (1) On or before July 31, 2007, before accumulating 21,000 CSN; and (2) After July 31, 2007, before accumulating 20,000 CSN. (k) Remove from service Tay 650–15 stage 1 LPT discs operated under flight plan profile B, before accumulating 21,000 CSN, and replace with serviceable parts. Tay 650–15 Engine Flight Plan Profile C (l) Remove from service Tay 650–15 stage 1 HPT discs operated under flight plan profile C and replace with serviceable parts: (1) On or before August 31, 2006, before accumulating 18,000 CSN; and (2) After August 31, 2006, but on or before July 31, 2007, before accumulating 15,800 CSN; and (3) After July 31, 2007, before accumulating 14,700 CSN. (m) Remove from service Tay 650–15 stage 1 LPT discs operated under flight plan profile C, before accumulating 18,000 CSN, and replace with serviceable parts. Tay 650–15 Engine Flight Plan Profile D (n) Remove from service Tay 650–15 stage 1 HPT discs operated under flight plan profile D and replace with serviceable parts: (1) On or before August 31, 2006, before accumulating 14,250 CSN; and (2) After August 31, 2006, before accumulating 11,000 CSN. (o) Remove from service Tay 650–15 stage 1 LPT discs operated under flight plan profile D, before accumulating 14,250 CSN, and replace with serviceable parts. Tay 651–54 Engines (p) Remove from service Tay 651–54 stage 1 HPT discs and replace with serviceable parts: (1) On or before August 31, 2006, before accumulating 14,250 CSN; and (2) After August 31, 2006, before accumulating 12,600 CSN. (q) Remove from service Tay 651–54 stage 1 LPT discs before accumulating 20,000 CSN and replace with serviceable parts. Alternative Methods of Compliance (r) The Manager, Engine Certification Office, FAA, 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 mstockstill on PROD1PC68 with PROPOSALS (s) Luftfahrt-Bundesamt airworthiness directive No. D–2005–252R1, dated August 31, 2005, also addresses the subject of this AD. Issued in Burlington, Massachusetts, on April 27, 2006. Francis A. Favara, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E6–6737 Filed 5–3–06; 8:45 am] BILLING CODE 4910–13–P VerDate Aug<31>2005 15:42 May 03, 2006 Jkt 208001 Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2006–24467; Airspace Docket No. 06–ANM–2] Proposed Revision of Class E Airspace; Eagle, CO Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking. AGENCY: SUMMARY: This action proposes to revise Class E airspace at Eagle, CO. Additional controlled airspace is necessary for the safety of aircraft executing the new Instrument Landing System or Localizer Distance Measuring Equipment (ILS or LOC.DME) Standard Instrument Approach Procedures (SIAP) and Flight Management System (FMS) SIAP at Eagle County Regional Airport. DATES: Comments must be received on or before June 19, 2006. ADDRESSES: Send comments on this proposal to the Docket Management System, U.S. Department of Transportation, Room Plaza 401, 400 Seventh Street, SW., Washington, DC 20590–0001. You must identify FAA Docket No. FAA 2006–24467 and Airspace Docket No. 06–ANM–2, at the beginning of your comments. You may also submit comments through the Internet at https://dms.dot.gov. FOR FURTHER INFORMATION CONTACT: Ed Haeseker, Federal Aviation Administration, Air Traffic Organization, Western En Route and Oceanic Service area Office, 1601 Lind Avenue, SW., Renton, WA 98055; telephone (425) 227–2527. SUPPLEMENTARY INFORMATION: Comments Invited Interested parties are invited to participate in this proposed rulemaking by submitting such written data, views, or arguments, as they may desire. Comments that provide the factual basis supporting the views and suggestions presented are particularly helpful in developing reasoned regulatory decisions on the proposal. Comments are specifically invited on the overall regulatory, aeronautical, economic, environmental, and energy-related aspects of the proposal. Communications should identify both docket numbers (FAA–2006–24467 and Airspace Docket No. 06–ANM–2) and be submitted in triplicate to the Docket Management System (see the ADDRESSES section for the address and phone number). PO 00000 Frm 00018 Fmt 4702 Sfmt 4702 You may also submit comments through the Internet at https:// dms.dot.gov. Commenters wishing the FAA to acknowledge receipt of their comments on this action must submit, with those comments, a self-addressed stamped postcard on which the following statement is made: ‘‘Comments to FAA Docket No. FAA–2006–24467 and Airspace Docket No. 06–ANM–2’’. The postcard will be date/time stamped and returned to the commenter. All communications received on or before the specified closing date for comments will be considered before taking action on the proposed rule. The proposal contained in this action may be changed in light of comments received. All comments submitted will be available for examination in the public docket both before and after the closing date for comments. A report summarizing each substantive public contact with FAA personnel concerned with this rulemaking will be filed in the docket. Availability of NPRM An electronic copy of this document may be downloaded through the Internet at https://dms.dot.gov. Recently published rulemaking documents can also be accessed through the FAA’s Web page at https://www.faa.gov or the Federal Register’s Web page at https:// www.gpoaccess.gov/fr/. You may review the public docket containing the proposal, any comments received, and any final disposition in person in the Dockets Office (see the ADDRESSES section for the address and phone number) between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. An informal docket may also be examined during normal business hours at the Northwest Mountain Regional Office of the Federal Aviation Administration, Air Traffic Organization, Western En Route and Oceanic Area Office, Airspace Branch, 1601 Lind Avenue, SW., Renton, WA 98055. Persons interested in being placed on a mailing list for future NPRM’s should contact the FAA’s Office of Rulemaking, (202) 267–9677, for a copy of Advisory Circular No. 11–2A, Notice of Proposed Rulemaking Distribution System, which describes the application procedure. The Proposal The FAA is proposing an amendment to Title 14 Code of Federal Regulations (14 CFR) part 71 by revising the Class E airspace area at Eagle County Regional Airport, Eagle, CO. Additional controlled airspace is necessary to accommodate aircraft using the new ILS E:\FR\FM\04MYP1.SGM 04MYP1

Agencies

[Federal Register Volume 71, Number 86 (Thursday, May 4, 2006)]
[Proposed Rules]
[Pages 26282-26284]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E6-6737]



[[Page 26282]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99-NE-61-AD]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Tay 
650-15 and Tay 651-54 Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to supersede an existing airworthiness 
directive (AD) for Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650-15 
turbofan engines. That AD currently establishes cyclic life limits for 
certain part number (P/N) stage 1 high pressure turbine (HPT) discs and 
stage 1 (LPT) discs operating under certain flight plan profiles. This 
proposed AD would add Tay 651-54 turbofan engines to the applicability. 
This proposed AD would also require removing certain stage 1 HPT discs 
and stage 1 LPT discs at reduced cyclic life limits using a drawdown 
schedule. This proposed AD results from RRD updating their low-cycle-
fatigue (LCF) analysis for stage 1 HPT discs and stage 1 LPT discs and 
reducing their cyclic life limits. We are proposing this AD to prevent 
cracks leading to turbine disc failure, which could result in an 
uncontained engine failure and damage to the airplane.

DATES: We must receive any comments on this proposed AD by July 3, 
2006.

ADDRESSES: Use one of the following addresses to comment on this 
proposed AD:
     By mail: Federal Aviation Administration (FAA), New 
England Region, Office of the Regional Counsel, Attention: Rules Docket 
No. 99-NE-61-AD, 12 New England Executive Park, Burlington, MA 01803.
     By fax: (781) 238-7055.
     By e-mail: 9-ane-adcomment@faa.gov.
    You can get the service information identified in this proposed AD 
from Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15872 
Blankenfelde-Mahlow, Germany, telephone 49-0-33-7086-1768; fax 49-0-33-
7086-3356.
    You may examine the AD docket, by appointment, 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; telephone (781) 238-7747, 
fax (781) 238-7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include ``AD Docket No. 99-NE-61-AD'' in the 
subject line of your comments. If you want us to acknowledge receipt of 
your mailed comments, send us a self-addressed, stamped postcard with 
the docket number written on it; we will date-stamp your postcard and 
mail it back to you. We specifically invite comments on the overall 
regulatory, economic, environmental, and energy aspects of the proposed 
AD. If a person contacts us verbally, and that contact relates to a 
substantive part of this proposed AD, we will summarize the contact and 
place the summary in the docket. We will consider all comments received 
by the closing date and may amend the proposed AD in light of those 
comments.

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.

Discussion

    On April 7, 2000, we issued AD 2000-08-01, Amendment 39-11687 (65 
FR 20714, April 18, 2000). That AD establishes Tay 650-15 cyclic life 
limits for stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 
LPT discs, P/N JR32318A operating under certain flight plan profiles. 
The Luftfahrt-Bundesamt (LBA), which is the airworthiness authority for 
Germany, notified us that an unsafe condition may exist on Tay 650-15 
and Tay 651-54 turbofan engines. The LBA advises that the current 
cyclic life limits for stage 1 HPT discs, P/N JR32013 and P/N JR33838, 
installed in Tay 650-15 and Tay 651-54 turbofan engines are too high.

Actions Since AD 2000-08-01 Was Issued

    Since AD 2000-08-01 was issued, RRD updated their LCF analysis for 
stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 LPT discs, 
P/N JR32318A, installed in Tay 650-15 and Tay 651-54 turbofan engines. 
Rolls-Royce Deutschland issued service information based on the LCF 
analysis.

Special Flight Permits Paragraph Removed

    Paragraph (d) of the current AD, AD 2000-08-01, contains a 
paragraph pertaining to special flight permits. Even though this 
proposed 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 proposed 
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.

Relevant Service Information

    We have reviewed and approved the technical contents of RRD Alert 
Service Bulletin (ASB) No. Tay-72-A1676, Revision 1, dated August 16, 
2005, that contains updated cyclic life limits. That ASB also describes 
procedures for calculating and re-establishing the achieved cyclic life 
of discs that have been exposed to different flight plans. That ASB 
also contains cyclic life limit drawdown schedules for discs in engine 
flight plan profiles B, C, and D. The LBA classified this ASB as 
mandatory. With European Aviation Safety Agency approval, the LBA 
issued AD No. D-2005-252R1, dated August 31, 2005, to ensure the 
airworthiness of these Tay 650-15 and Tay 651-54 turbofan engines in 
Germany.

Bilateral Agreement Information

    These engine models are manufactured in Germany and 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 has kept the FAA informed of 
the situation described above. We have examined the findings of the 
LBA, 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.

[[Page 26283]]

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other products 
of this same type design. Therefore, we are proposing this AD, which 
would require, for Tay 650-15 and Tay 651-54 engines:
     Calculating and re-establishing the achieved cyclic life 
of stage 1 HPT discs, P/N JR32013 and P/N JR33838, and stage 1 LPT 
discs, P/N JR32318A, that have been exposed to different flight plans; 
and
     Removing those stage 1 HPT discs and stage 1 LPT discs 
operated under engine flight plans A, B, C, and D at reduced cyclic 
life limits, using a drawdown schedule for certain discs and profiles.
    The proposed AD would require that you do these actions using the 
service information described previously.

Costs of Compliance

    We estimate that this proposed AD would affect 50 Tay 650-15 and 
Tay 651-54 turbofan engines installed on airplanes of U.S. registry. We 
also estimate that it would take about one workhour per engine to 
calculate and re-establish the achieved cyclic life for a disc, and 
that the average labor rate is $80 per workhour. We estimate that the 
prorated cost of the life reduction per engine would be $15,000. Based 
on these figures, we estimate that if all of the engines required 
calculating and re-establishing achieved cyclic life, the total cost of 
the proposed AD to U.S. operators would be $752,000.

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 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 summary of the costs to comply with this proposal 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. 99-NE-61-AD'' in your request.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, 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 removing Amendment 39-11687 (65 FR 
20714, April 18, 2000) and by adding a new airworthiness directive, to 
read as follows:

Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc): 
Docket No. 99-NE-61-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this airworthiness directive (AD) action by July 3, 
2006.

Affected ADs

    (b) This AD supersedes AD 2000-08-01, Amendment 39-11687.

Applicability

    (c) This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) 
Tay 650-15 and Tay 651-54 turbofan engines with stage 1 high 
pressure turbine (HPT) discs, part number (P/N) JR32013 and P/N 
JR33838, and stage 1 low pressure turbine (LPT) discs, P/N JR32318A, 
installed. These engines are installed on, but not limited to, 
Fokker Model F.28 Mark 0100, and Boeing 727-100 series airplanes 
modified in accordance with Supplemental Type Certificate (STC) 
SA8472SW (727 QF).

Unsafe Condition

    (d) This AD results from RRD updating their low-cycle-fatigue 
(LCF) analysis for stage 1 HPT discs and stage 1 LPT discs and 
reducing their cyclic life limits. We are issuing this AD to prevent 
cracks leading to turbine disc failure, which could result in an 
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) Information on the referenced engine flight plan profiles A, 
B, C, and D can be found in RRD Tay Engine Manual, Section 70-01-10.

Calculating and Re-Establishing Within 30 Days, the Achieved Cyclic 
Life of a Stage 1 HPT or Stage 1 LPT Disc Previously Exposed to 
Different Flight Plan(s)

    (g) If a stage 1 HPT disc or stage 1 LPT disc was previously 
exposed to flight plan(s) different than the currently operated 
flight plan:
    (1) You must calculate and re-establish the achieved cyclic life 
for that disc, within 30 days after the effective date of this AD.
    (2) Use paragraphs 3.A. through 3.D.(2)(c) of Accomplishment 
Instructions of RRD Alert Service Bulletin (ASB) No. Tay-72-A1676, 
Revision 1, dated August 16, 2005, to calculate and re-establish the 
achieved cyclic life.

After an Engine Flight Plan Changeover, Calculating and Re-Establishing 
Within 30 Days, the Achieved Cyclic Life of Stage 1 HPT Discs and Stage 
1 LPT Discs

    (h) After an engine has a flight plan changeover:
    (1) You must calculate and re-establish the achieved cyclic life 
for the stage 1 HPT disc and stage 1 LPT disc, within 30 days after 
the flight plan changeover.
    (2) Use paragraphs 3.A. through 3.D.(2)(c) of Accomplishment 
Instructions of RRD ASB No. Tay-72-A1676, Revision 1, dated August 
16, 2005, to calculate and re-establish the achieved cyclic life.

Removal of Stage 1 HPT Discs and Stage 1 LPT Discs From Service Tay 
650-15 Engine Flight Plan Profile A

    (i) Remove from service Tay 650-15 stage 1 HPT discs and stage 1 
LPT discs operated under flight plan profile A, before accumulating 
23,000 cycles-since-new (CSN), and replace with serviceable parts.

[[Page 26284]]

Tay 650-15 Engine Flight Plan Profile B

    (j) Remove from service Tay 650-15 stage 1 HPT discs operated 
under flight plan profile B and replace with serviceable parts:
    (1) On or before July 31, 2007, before accumulating 21,000 CSN; 
and
    (2) After July 31, 2007, before accumulating 20,000 CSN.
    (k) Remove from service Tay 650-15 stage 1 LPT discs operated 
under flight plan profile B, before accumulating 21,000 CSN, and 
replace with serviceable parts.

Tay 650-15 Engine Flight Plan Profile C

    (l) Remove from service Tay 650-15 stage 1 HPT discs operated 
under flight plan profile C and replace with serviceable parts:
    (1) On or before August 31, 2006, before accumulating 18,000 
CSN; and
    (2) After August 31, 2006, but on or before July 31, 2007, 
before accumulating 15,800 CSN; and
    (3) After July 31, 2007, before accumulating 14,700 CSN.
    (m) Remove from service Tay 650-15 stage 1 LPT discs operated 
under flight plan profile C, before accumulating 18,000 CSN, and 
replace with serviceable parts.

Tay 650-15 Engine Flight Plan Profile D

    (n) Remove from service Tay 650-15 stage 1 HPT discs operated 
under flight plan profile D and replace with serviceable parts:
    (1) On or before August 31, 2006, before accumulating 14,250 
CSN; and
    (2) After August 31, 2006, before accumulating 11,000 CSN.
    (o) Remove from service Tay 650-15 stage 1 LPT discs operated 
under flight plan profile D, before accumulating 14,250 CSN, and 
replace with serviceable parts.

Tay 651-54 Engines

    (p) Remove from service Tay 651-54 stage 1 HPT discs and replace 
with serviceable parts:
    (1) On or before August 31, 2006, before accumulating 14,250 
CSN; and
    (2) After August 31, 2006, before accumulating 12,600 CSN.
    (q) Remove from service Tay 651-54 stage 1 LPT discs before 
accumulating 20,000 CSN and replace with serviceable parts.

Alternative Methods of Compliance

    (r) The Manager, Engine Certification Office, FAA, 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

    (s) Luftfahrt-Bundesamt airworthiness directive No. D-2005-
252R1, dated August 31, 2005, also addresses the subject of this AD.

    Issued in Burlington, Massachusetts, on April 27, 2006.
Francis A. Favara,
Manager, Engine and Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. E6-6737 Filed 5-3-06; 8:45 am]
BILLING CODE 4910-13-P
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