Airworthiness Directives; International Aero Engines AG Turbofan Engines, 55624-55627 [2020-19749]

Download as PDF 55624 Federal Register / Vol. 85, No. 175 / Wednesday, September 9, 2020 / Proposed Rules Revision 39, dated October 26, 2018; which can be found on the Flight Standards Information Management System (FSIMS) website, https://fsims.faa.gov/ PICResults.aspx?mode=Publication &doctype=MMELByModel. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, Seattle ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j) of this AD. Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (j) Related Information For more information about this AD, contact Jeffrey Rothman, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98190; phone and fax: 206–231–3558; jeffrey.rothman@faa.gov. Issued on August 21, 2020. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–19583 Filed 9–8–20; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0700; Project Identifier AD–2020–00238–E] RIN 2120–AA64 Airworthiness Directives; International Aero Engines AG Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: VerDate Sep<11>2014 16:26 Sep 08, 2020 Jkt 250001 The FAA proposes to supersede Airworthiness Directive (AD) 2019–06–06, which applies to all International Aero Engines AG (IAE) V2500–A1, V2522–A5, V2524–A5, V2525–D5, V2527–A5, V2527E–A5, V2527M–A5, V2528–D5, V2530–A5, V2533–A5 model turbofan engines. AD 2019–06–06 requires initial and repetitive borescope inspections (BSIs) of the diffuser case M-flange and, if it fails the inspection, replacement of the diffuser case with a part eligible for installation. Since the FAA issued AD 2019–06–06, the manufacturer performed an updated safety risk analysis, which reduced the diffuser case M-flange inspection intervals and added the performance of a replacement of the diffuser case M-flange. This proposed AD would require an initial BSI of the diffuser case M-flange and, if it fails the inspection, repetitive BSIs of the diffuser case M-flange until replacement of the diffuser case Mflange is performed. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by October 26, 2020. SUMMARY: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact International Aero Engines AG, 400 Main Street, East Hartford, CT 06118; phone: 800–565– 0140; email: help24@pw.utc.com; website: https://fleetcare.pw.utc.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781–238–7759. ADDRESSES: Examining the AD Docket You may examine the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2020– 0700; or in person at Docket Operations PO 00000 Frm 00028 Fmt 4702 Sfmt 4702 between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Nicholas Paine, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238–7742; fax: 781–238–7199; email: nicholas.j.paine@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2020–0700; Project Identifier AD–2020–00238–E’’ at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this NPRM because of those comments. Except for Confidential Business Information as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to https:// www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this proposal. Confidential Business Information Confidential Business Information (CBI) is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Nicholas Paine, E:\FR\FM\09SEP1.SGM 09SEP1 55625 Federal Register / Vol. 85, No. 175 / Wednesday, September 9, 2020 / Proposed Rules Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background The FAA issued AD 2019–06–06, Amendment 39–19604 (84 FR 11642, March 28, 2019) (‘‘AD 2019–06–06’’), for all IAE V2500–A1, V2522–A5, V2524– A5, V2525–D5, V2527–A5, V2527E–A5, V2527M–A5, V2528–D5, V2530–A5, V2533–A5 model turbofan engines. AD 2019–06–06 requires initial and repetitive BSIs of the diffuser case Mflange and, if it fails the inspection, replacement of the diffuser case with a part eligible for installation. AD 2019– 06–06 resulted from a crack found at the diffuser case M-flange during overhaul inspection. The FAA issued AD 2019– 06–06 to prevent failure of the diffuser case. Actions Since AD 2019–06–06 Was Issued Since the FAA issued AD 2019–06– 06, the manufacturer performed an updated safety risk analysis, which resulted in reducing the diffuser case Mflange inspection intervals and adding the performance of a replacement of the diffuser case M-flange, which terminates the need for repetitive BSIs of the diffuser case M-flange. FAA’s Determination The FAA is issuing this NPRM because the agency has determined that the unsafe condition described previously is likely to exist or develop in other products of the same type design. Service Information Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed IAE NonModification Alert Service Bulletin (NMASB) V2500–ENG–72–A0706, Revision 2, dated November 7, 2019. IAE NMASB V2500–ENG–72–A0706, Revision 2, describes procedures for inspecting the diffuser case M-flange. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. Other Related Service Information The FAA reviewed IAE Service Bulletin (SB) V2500–ENG–72–0709, dated December 13, 2019. IAE SB V2500–ENG–72–0709 describes procedures for replacing the diffuser case M-flange. Proposed AD Requirements in This NPRM This proposed AD would retain certain requirements of AD 2019–06–06. This proposed AD would require an initial BSI of the diffuser case M-flange and, if it fails the inspection, repetitive BSIs of the diffuser case M-flange until replacement of the diffuser case Mflange is performed. Costs of Compliance The FAA estimates that this AD, as proposed, would affect 1,654 engines installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS Action Labor cost BSI of diffuser case M-flange ......................... Replace the diffuser case M-flange ................ 2 work-hours × $85 per hour = $170 ............. 40 work-hours × $85 per hour = $3,400 ........ According to the manufacturer, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage for affected individuals. As a result, the FAA has included all costs in its cost estimate. 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. The FAA is 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 VerDate Sep<11>2014 16:26 Sep 08, 2020 Jkt 250001 Parts cost Cost per product $0 20,000 Cost on U.S. operators $170 23,400 $281,180 38,703,600 that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. List of Subjects in 14 CFR Part 39 Regulatory Findings The Proposed Amendment The FAA has 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) Would not affect intrastate aviation in Alaska, 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. Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PO 00000 Frm 00029 Fmt 4702 Sfmt 4702 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 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: a. Removing Airworthiness Directive (AD) 2019–06–06, Amendment 39– 19604 (84 FR 11642, March 28, 2019); and ■ b. Adding the following new AD: ■ ■ International Aero Engines AG: Docket No. FAA–2020–0700; Project Identifier AD– 2020–00238–E. E:\FR\FM\09SEP1.SGM 09SEP1 Federal Register / Vol. 85, No. 175 / Wednesday, September 9, 2020 / Proposed Rules (a) Comments Due Date The FAA must receive comments on this AD action by October 26, 2020. (b) Affected ADs This AD replaces AD 2019–06–06, Amendment 39–19604 (84 FR 11642, March 28, 2019). (c) Applicability This AD applies to all International Aero Engines AG (IAE) V2500–A1, V2522–A5, V2524–A5, V2525–D5, V2527–A5, V2527E– A5, V2527M–A5, V2528–D5, V2530–A5, and V2533–A5 model turbofan engines. (e) Unsafe Condition (g) Required Actions This AD was prompted by a crack found at the diffuser case M-flange during overhaul inspection. The FAA is issuing this AD to prevent failure of the diffuser case. The unsafe condition, if not addressed, could result in uncontained diffuser case rupture, damage to the engine, and damage to the airplane. (1) Borescope Inspection of Diffuser Case MFlange (f) Compliance Comply with this AD within the compliance times specified, unless already done. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (ii) For engines with a diffuser case Mflange that has fewer than 19,000 CSN on the effective date of this AD, perform the BSI of the diffuser case M-flange before accumulating 20,300 CSN. (iii) For engines with a diffuser case Mflange in which the CSN is unknown, perform the BSI of the diffuser case M-flange within 250 cycles after the effective date of this AD. (iv) Use the Accomplishment Instructions, paragraphs 2.A. through 2.G. of IAE NonModification Alert Service Bulletin (NMASB) V2500–ENG–72–A0706, Revision 2, dated November 7, 2019 (‘‘the NMASB’’), to perform the initial BSI. (v) If no crack is found as a result of the inspections required by paragraphs (g)(1)(i) through (iii) of this AD, repeat the BSI of zones 1, 2, and 3 of the diffuser case M-flange at intervals not to exceed 2,100 cycles since the previous BSI. (vi) If a crack is found as a result of the inspections required by paragraphs (g)(1)(i) through (iii) of this AD, replace the diffuser case M-flange or repeat the BSI of zones 1, 2, and 3 of the diffuser case M-flange as specified by either ‘‘Table 2: Fly on Limits’’ or ‘‘Table 4: Fly on Limits,’’ in paragraph 2, Accomplishment Instructions, of the NMASB as appropriate for the affected the engine model. VerDate Sep<11>2014 16:26 Sep 08, 2020 Jkt 250001 (2) Replacement of the Diffuser Case MFlange (i) At the next engine shop visit after the effective date of this AD or before the diffuser case M-flange accumulates 20,000 CSN, whichever occurs later, replace the diffuser case M-flange. Note 1 to paragraph (g)(2)(i): Guidance on performing the replacement of the diffuser case M-flange can be found in the Accomplishment Instructions, paragraphs 1.A. and B., of IAE SB V2500–ENG–72–0709, dated December 13, 2019. (ii) Thereafter, repeat the replacement of the diffuser case M-flange before accumulating 20,000 cycles since the previous replacement. (iii) Replacement of the diffuser case Mflange is the terminating action for the repetitive BSIs required by paragraph (g)(1) of this AD. (h) Installation Prohibition After the effective date of this AD, do not install a diffuser case onto any engine if the diffuser case M-flange has more than 20,000 CSN. (i) Credit for Previous Actions You may take credit for the initial BSIs that are required by paragraphs (g)(1)(i) through (iii) of this AD, or the replacement of the diffuser case M-flange required by paragraph (g)(2) of this AD, if you performed those actions before the effective date of this AD PO 00000 Frm 00030 Fmt 4702 Sfmt 4702 For engines with a diffuser case assembly, part number 2A0051, 2A2081–01, 2A2581– 01, 2A2883–01, 2A2885–01, 2A2889–01, 2A2891–01, 2A2896–01, 2A2897–01, or 2A3132 installed, perform an initial borescope inspection (BSI) of zones 1, 2, and 3 of the diffuser case M-flange as follows: (i) For engines with a diffuser case Mflange that has 19,000 or more cycles since new (CSN) on the effective date of this AD, perform the BSI of the diffuser case M-flange before accumulating the ‘‘Inspect within (Cycles)’’ in Table 1 to paragraph (g)(1) of this AD. If the CSLFPI is unknown, use the CSN of the diffuser case M-flange. using IAE NMASB V2500–ENG–72–A0706, Revision 1, dated June 28, 2019, or Original Issue, dated February 14, 2019; IAE V2500 Special Instruction (SI) No. 341F–18, dated November 19, 2018; IAE V2500 SI No. 350F– 18, Rev. 1, dated December 17, 2018; IAE V2500 SI No. 356F–18, Rev. 1, dated January 9, 2019; IAE V2500 SI No. 372F–18, dated January 8, 2019; or IAE V2500 Special SI No. 04F–19, dated January 14, 2019. (j) Definition For the purpose of this AD, an ‘‘engine shop visit’’ is the induction of the engine into the shop for maintenance involving the separation of pairs of major mating engine flanges. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (l)(1) of this AD. You may email your request to: ANE-AD-AMOC@ faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager E:\FR\FM\09SEP1.SGM 09SEP1 EP09SE20.006</GPH> 55626 Federal Register / Vol. 85, No. 175 / Wednesday, September 9, 2020 / Proposed Rules of the local flight standards district office/ certificate holding district office. management of instrument flight rules (IFR) operations in the area. (l) Related Information DATES: Comments must be received on or before October 26, 2020. (1) For more information about this AD, contact Nicholas Paine, Aerospace Engineer, ADDRESSES: Send comments on this ECO Branch, FAA, 1200 District Avenue, proposal to: The U.S. Department of Burlington, MA 01803; phone: 781–238– Transportation, Docket Operations, 1200 7742; fax: 781–238–7199; email: New Jersey Avenue SE, West Building nicholas.j.paine@faa.gov. Ground Floor, Room W12–140, (2) For service information identified in Washington, DC 20590–0001; this AD, contact International Aero Engines Telephone: (800) 647–5527, or (202) AG, 400 Main Street, East Hartford, CT 06118; phone: 800–565–0140; email: help24@ 366–9826. You must identify the Docket pw.utc.com; website: https:// No. FAA–2020–0701; Airspace Docket fleetcare.pw.utc.com. You may view this No. 20–ASO–19, at the beginning of referenced service information at the FAA, your comments. You may also submit Airworthiness Products Section, Operational comments through the internet at Safety Branch, 1200 District Avenue, https://www.regulations.gov. Burlington, MA 01803. For information on FAA Order 7400.11D, Airspace the availability of this material at the FAA, Designations and Reporting Points, and call 781–238–7759. subsequent amendments can be viewed Issued on September 1, 2020. on line at https://www.faa.gov/air_ Lance T. Gant, traffic/publications/. For further Director, Compliance & Airworthiness information, you can contact the Division, Aircraft Certification Service. Airspace Policy Group, Federal Aviation [FR Doc. 2020–19749 Filed 9–8–20; 8:45 am] Administration, 800 Independence BILLING CODE 4910–13–P Avenue SW, Washington, DC, 20591; Telephone: (202) 267–8783. The Order is also available for inspection at the DEPARTMENT OF TRANSPORTATION National Archives and Records Administration (NARA). For Federal Aviation Administration information on the availability of FAA Order 7400.11D at NARA, email 14 CFR Part 71 fedreg.legal@nara.gov or go to https:// [Docket No. FAA–2020–0701; Airspace www.archives.gov/federal-register/cfr/ Docket No. 20–ASO–19] ibr-locations.html. RIN 2120–AA66 FOR FURTHER INFORMATION CONTACT: John Fornito, Operations Support Group, Proposed Establishment of Class D Eastern Service Center, Federal Aviation and Class E Airspace and Proposed Administration, 1701 Columbia Avenue, Amendment of Class E Airspace; College Park, GA 30337; Telephone Nashville, TN (404) 305–6364. SUPPLEMENTARY INFORMATION: AGENCY: Federal Aviation Administration (FAA), DOT. Authority for This Rulemaking ACTION: Notice of proposed rulemaking The FAA’s authority to issue rules (NPRM). regarding aviation safety is found in Title 49 of the United States Code. SUMMARY: This action proposes to Subtitle I, Section 106 describes the establish Class D and Class E airspace designated as an extension to Class D or authority of the FAA Administrator. Subtitle VII, Aviation Programs, E surface area, and amend Class E describes in more detail the scope of the airspace extending upward from 700 agency’s authority. This rulemaking is feet above the surface for John C. Tune promulgated under the authority Airport, Nashville, TN, as a new air described in Subtitle VII, Part A, traffic control tower shall service the Subpart I, Section 40103. Under that airport. This action would also update section, the FAA is charged with the geographic coordinates of the prescribing regulations to assign the use airport, as well as Sumner County of airspace necessary to ensure the Regional Airport, and Lebanon safety of aircraft and the efficient use of Municipal Airport, and Murfreesboro airspace. This regulation is within the Municipal Airport. In addition, this scope of that authority as it would action would establish Class E airspace establish Class D and Class E airspace, extending upward from 700 feet above and amend Class E airspace for John C. the surface for Vanderbilt University Tune Airport, and establish Class E Hospital Heliport, as instrument airspace for Vanderbilt University approaches have been designed for the Hospital Heliport, Nashville, TN, to heliport. Controlled airspace is support IFR operations in the area. necessary for the safety and VerDate Sep<11>2014 16:26 Sep 08, 2020 Jkt 250001 PO 00000 Frm 00031 Fmt 4702 Sfmt 4702 55627 Comments Invited Interested persons are invited to comment on 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 (Docket No. FAA– 2020–0701 and Airspace Docket No. 20– ASO–19) and be submitted in triplicate to DOT Docket Operations (see ADDRESSES section for the address and phone number). You may also submit comments through the internet at https://www.regulations.gov. Persons 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–2020–0701; Airspace Docket No. 20–ASO–19’’. The postcard will be date/time stamped and returned to the commenter. All communications received before the specified closing date for comments will be considered before taking action on the proposed rule. The proposal contained in this document may be changed in light of the comments received. All comments submitted will be available for examination in the public docket both before and after the comment closing date. A report summarizing each substantive public contact with FAA personnel concerned with this rulemaking will be filed in the docket. Availability of NPRMs An electronic copy of this document may be downloaded through the internet at https://www.regulations.gov. Recently published rulemaking documents can also be accessed through the FAA’s web page at https:// www.faa.gov/air_traffic/publications/ airspace_amendments/. 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 address and phone number) between 9:00 a.m. and 5:00 p.m., Monday through Friday, except federal holidays. An informal docket may also be examined between 8:00 a.m. and 4:30 p.m., Monday through Friday, except federal holidays E:\FR\FM\09SEP1.SGM 09SEP1

Agencies

[Federal Register Volume 85, Number 175 (Wednesday, September 9, 2020)]
[Proposed Rules]
[Pages 55624-55627]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-19749]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0700; Project Identifier AD-2020-00238-E]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines AG Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2019-06-06, which applies to all International Aero Engines AG (IAE) 
V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, 
V2528-D5, V2530-A5, V2533-A5 model turbofan engines. AD 2019-06-06 
requires initial and repetitive borescope inspections (BSIs) of the 
diffuser case M-flange and, if it fails the inspection, replacement of 
the diffuser case with a part eligible for installation. Since the FAA 
issued AD 2019-06-06, the manufacturer performed an updated safety risk 
analysis, which reduced the diffuser case M-flange inspection intervals 
and added the performance of a replacement of the diffuser case M-
flange. This proposed AD would require an initial BSI of the diffuser 
case M-flange and, if it fails the inspection, repetitive BSIs of the 
diffuser case M-flange until replacement of the diffuser case M-flange 
is performed. The FAA is proposing this AD to address the unsafe 
condition on these products.

DATES: The FAA must receive comments on this proposed AD by October 26, 
2020.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact 
International Aero Engines AG, 400 Main Street, East Hartford, CT 
06118; phone: 800-565-0140; email: [email protected]; website: https://fleetcare.pw.utc.com. You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 1200 
District Avenue, Burlington, MA 01803. For information on the 
availability of this material at the FAA, call 781-238-7759.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0700; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this NPRM, any comments received, and other information. The street 
address for Docket Operations is listed above. Comments will be 
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Nicholas Paine, Aerospace Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
781-238-7742; fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2020-0700; 
Project Identifier AD-2020-00238-E'' at the beginning of your comments. 
The most helpful comments reference a specific portion of the proposal, 
explain the reason for any recommended change, and include supporting 
data. The FAA will consider all comments received by the closing date 
and may amend this NPRM because of those comments.
    Except for Confidential Business Information as described in the 
following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
https://www.regulations.gov, including any personal information you 
provide. The agency will also post a report summarizing each 
substantive verbal contact received about this proposal.

Confidential Business Information

    Confidential Business Information (CBI) is commercial or financial 
information that is both customarily and actually treated as private by 
its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), 
CBI is exempt from public disclosure. If your comments responsive to 
this NPRM contain commercial or financial information that is 
customarily treated as private, that you actually treat as private, and 
that is relevant or responsive to this NPRM, it is important that you 
clearly designate the submitted comments as CBI. Please mark each page 
of your submission containing CBI as ``PROPIN.'' The FAA will treat 
such marked submissions as confidential under the FOIA, and they will 
not be placed in the public docket of this NPRM. Submissions containing 
CBI should be sent to Nicholas Paine,

[[Page 55625]]

Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, 
MA 01803. Any commentary that the FAA receives which is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    The FAA issued AD 2019-06-06, Amendment 39-19604 (84 FR 11642, 
March 28, 2019) (``AD 2019-06-06''), for all IAE V2500-A1, V2522-A5, 
V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, 
V2533-A5 model turbofan engines. AD 2019-06-06 requires initial and 
repetitive BSIs of the diffuser case M-flange and, if it fails the 
inspection, replacement of the diffuser case with a part eligible for 
installation. AD 2019-06-06 resulted from a crack found at the diffuser 
case M-flange during overhaul inspection. The FAA issued AD 2019-06-06 
to prevent failure of the diffuser case.

Actions Since AD 2019-06-06 Was Issued

    Since the FAA issued AD 2019-06-06, the manufacturer performed an 
updated safety risk analysis, which resulted in reducing the diffuser 
case M-flange inspection intervals and adding the performance of a 
replacement of the diffuser case M-flange, which terminates the need 
for repetitive BSIs of the diffuser case M-flange.

FAA's Determination

    The FAA is issuing this NPRM because the agency has determined that 
the unsafe condition described previously is likely to exist or develop 
in other products of the same type design.

Service Information Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed IAE Non-Modification Alert Service Bulletin 
(NMASB) V2500-ENG-72-A0706, Revision 2, dated November 7, 2019. IAE 
NMASB V2500-ENG-72-A0706, Revision 2, describes procedures for 
inspecting the diffuser case M-flange. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section.

Other Related Service Information

    The FAA reviewed IAE Service Bulletin (SB) V2500-ENG-72-0709, dated 
December 13, 2019. IAE SB V2500-ENG-72-0709 describes procedures for 
replacing the diffuser case M-flange.

Proposed AD Requirements in This NPRM

    This proposed AD would retain certain requirements of AD 2019-06-
06. This proposed AD would require an initial BSI of the diffuser case 
M-flange and, if it fails the inspection, repetitive BSIs of the 
diffuser case M-flange until replacement of the diffuser case M-flange 
is performed.

Costs of Compliance

    The FAA estimates that this AD, as proposed, would affect 1,654 
engines installed on airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
BSI of diffuser case M-flange.........  2 work-hours x $85 per                $0            $170        $281,180
                                         hour = $170.
Replace the diffuser case M-flange....  40 work-hours x $85 per           20,000          23,400      38,703,600
                                         hour = $3,400.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, some of the costs of this proposed 
AD may be covered under warranty, thereby reducing the cost impact on 
affected individuals. The FAA does not control warranty coverage for 
affected individuals. As a result, the FAA has included all costs in 
its cost estimate.

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.
    The FAA is 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

    The FAA has 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) Would not affect intrastate aviation in Alaska, 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.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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:
0
a. Removing Airworthiness Directive (AD) 2019-06-06, Amendment 39-19604 
(84 FR 11642, March 28, 2019); and
0
b. Adding the following new AD:

International Aero Engines AG: Docket No. FAA-2020-0700; Project 
Identifier AD-2020-00238-E.

[[Page 55626]]

(a) Comments Due Date

    The FAA must receive comments on this AD action by October 26, 
2020.

(b) Affected ADs

    This AD replaces AD 2019-06-06, Amendment 39-19604 (84 FR 11642, 
March 28, 2019).

(c) Applicability

    This AD applies to all International Aero Engines AG (IAE) 
V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-
A5, V2528-D5, V2530-A5, and V2533-A5 model turbofan engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine 
Section.

(e) Unsafe Condition

    This AD was prompted by a crack found at the diffuser case M-
flange during overhaul inspection. The FAA is issuing this AD to 
prevent failure of the diffuser case. The unsafe condition, if not 
addressed, could result in uncontained diffuser case rupture, damage 
to the engine, and damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

(1) Borescope Inspection of Diffuser Case M-Flange

    For engines with a diffuser case assembly, part number 2A0051, 
2A2081-01, 2A2581-01, 2A2883-01, 2A2885-01, 2A2889-01, 2A2891-01, 
2A2896-01, 2A2897-01, or 2A3132 installed, perform an initial 
borescope inspection (BSI) of zones 1, 2, and 3 of the diffuser case 
M-flange as follows:
    (i) For engines with a diffuser case M-flange that has 19,000 or 
more cycles since new (CSN) on the effective date of this AD, 
perform the BSI of the diffuser case M-flange before accumulating 
the ``Inspect within (Cycles)'' in Table 1 to paragraph (g)(1) of 
this AD. If the CSLFPI is unknown, use the CSN of the diffuser case 
M-flange.
[GRAPHIC] [TIFF OMITTED] TP09SE20.006

    (ii) For engines with a diffuser case M-flange that has fewer 
than 19,000 CSN on the effective date of this AD, perform the BSI of 
the diffuser case M-flange before accumulating 20,300 CSN.
    (iii) For engines with a diffuser case M-flange in which the CSN 
is unknown, perform the BSI of the diffuser case M-flange within 250 
cycles after the effective date of this AD.
    (iv) Use the Accomplishment Instructions, paragraphs 2.A. 
through 2.G. of IAE Non-Modification Alert Service Bulletin (NMASB) 
V2500-ENG-72-A0706, Revision 2, dated November 7, 2019 (``the 
NMASB''), to perform the initial BSI.
    (v) If no crack is found as a result of the inspections required 
by paragraphs (g)(1)(i) through (iii) of this AD, repeat the BSI of 
zones 1, 2, and 3 of the diffuser case M-flange at intervals not to 
exceed 2,100 cycles since the previous BSI.
    (vi) If a crack is found as a result of the inspections required 
by paragraphs (g)(1)(i) through (iii) of this AD, replace the 
diffuser case M-flange or repeat the BSI of zones 1, 2, and 3 of the 
diffuser case M-flange as specified by either ``Table 2: Fly on 
Limits'' or ``Table 4: Fly on Limits,'' in paragraph 2, 
Accomplishment Instructions, of the NMASB as appropriate for the 
affected the engine model.

(2) Replacement of the Diffuser Case M-Flange

    (i) At the next engine shop visit after the effective date of 
this AD or before the diffuser case M-flange accumulates 20,000 CSN, 
whichever occurs later, replace the diffuser case M-flange.

    Note 1 to paragraph (g)(2)(i): Guidance on performing the 
replacement of the diffuser case M-flange can be found in the 
Accomplishment Instructions, paragraphs 1.A. and B., of IAE SB 
V2500-ENG-72-0709, dated December 13, 2019.

    (ii) Thereafter, repeat the replacement of the diffuser case M-
flange before accumulating 20,000 cycles since the previous 
replacement.
    (iii) Replacement of the diffuser case M-flange is the 
terminating action for the repetitive BSIs required by paragraph 
(g)(1) of this AD.

(h) Installation Prohibition

    After the effective date of this AD, do not install a diffuser 
case onto any engine if the diffuser case M-flange has more than 
20,000 CSN.

(i) Credit for Previous Actions

    You may take credit for the initial BSIs that are required by 
paragraphs (g)(1)(i) through (iii) of this AD, or the replacement of 
the diffuser case M-flange required by paragraph (g)(2) of this AD, 
if you performed those actions before the effective date of this AD 
using IAE NMASB V2500-ENG-72-A0706, Revision 1, dated June 28, 2019, 
or Original Issue, dated February 14, 2019; IAE V2500 Special 
Instruction (SI) No. 341F-18, dated November 19, 2018; IAE V2500 SI 
No. 350F-18, Rev. 1, dated December 17, 2018; IAE V2500 SI No. 356F-
18, Rev. 1, dated January 9, 2019; IAE V2500 SI No. 372F-18, dated 
January 8, 2019; or IAE V2500 Special SI No. 04F-19, dated January 
14, 2019.

(j) Definition

    For the purpose of this AD, an ``engine shop visit'' is the 
induction of the engine into the shop for maintenance involving the 
separation of pairs of major mating engine flanges.

(k) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO Branch, FAA, has the authority to approve 
AMOCs for this AD, if requested using the procedures found in 14 CFR 
39.19. In accordance with 14 CFR 39.19, send your request to your 
principal inspector or local Flight Standards District Office, as 
appropriate. If sending information directly to the manager of the 
certification office, send it to the attention of the person 
identified in paragraph (l)(1) of this AD. You may email your 
request to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager

[[Page 55627]]

of the local flight standards district office/certificate holding 
district office.

(l) Related Information

    (1) For more information about this AD, contact Nicholas Paine, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7742; fax: 781-238-7199; email: 
[email protected].
    (2) For service information identified in this AD, contact 
International Aero Engines AG, 400 Main Street, East Hartford, CT 
06118; phone: 800-565-0140; email: [email protected]; website: 
https://fleetcare.pw.utc.com. You may view this referenced service 
information at the FAA, Airworthiness Products Section, Operational 
Safety Branch, 1200 District Avenue, Burlington, MA 01803. For 
information on the availability of this material at the FAA, call 
781-238-7759.

    Issued on September 1, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-19749 Filed 9-8-20; 8:45 am]
BILLING CODE 4910-13-P
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