Airworthiness Directives; General Electric Company Turbofan Engines, 34664-34666 [2020-12157]

Download as PDF 34664 Federal Register / Vol. 85, No. 110 / Monday, June 8, 2020 / Proposed Rules (h) Installation Prohibition After the effective date of this AD, do not install the affected HPT rotor stage 2 disks or the stages 6–10 compressor rotor spool identified in Table 1 to paragraph (g) of this AD on an engine. (i) 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 (j)(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 of the local flight standards district office/ certificate holding district office. (j) Related Information (1) For more information about this AD, contact Mehdi Lamnyi, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781–238– 7743; fax: 781–238–7199; email: Mehdi.Lamnyi@faa.gov. (2) For service information identified in this AD, contact General Electric Company, GE Aviation, Room 285, 1 Neumann Way, Cincinnati, OH 45215; phone: 513–552–3272; email: aviation.fleetsupport@ge.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 June 1, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–12160 Filed 6–5–20; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0557; Project Identifier AD–2020–00541–E] khammond on DSKJM1Z7X2PROD with PROPOSALS RIN 2120–AA64 Airworthiness Directives; General Electric Company Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to supersede Airworthiness Directive (AD) SUMMARY: VerDate Sep<11>2014 16:34 Jun 05, 2020 Jkt 250001 2018–15–04, which applies to certain General Electric Company (GE) CF6– 80A, CF6–80A1, CF6–80A2, CF6–80A3, CF6–80C2A1, CF6–80C2A2, CF6– 80C2A3, CF6–80C2A5, CF6–80C2A5F, CF6–80C2A8, CF6–80C2B1, CF6– 80C2B1F, CF6–80C2B2, CF6–80C2B2F, CF6–80C2B4, CF6–80C2B4F, CF6– 80C2B5F, CF6–80C2B6, CF6–80C2B6F, CF6–80C2B6FA, CF6–80C2B7F, CF6– 80C2D1F, CF6–80C2L1F, and CF6– 80C2K1F model turbofan engines. AD 2018–15–04 requires ultrasonic inspection (UI) of high-pressure turbine (HPT) stage 1 and stage 2 disks. Since we issued AD 2018–15–04, GE determined the need to expand the population of affected disks. This proposed AD would retain the required inspections while expanding the population of affected disks. 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 July 23, 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 General Electric Company, 1 Neumann Way, Cincinnati, OH 45215, United States; phone: (513) 552–3272; email: aviation.fleetsupport@ ae.ge.com; website: www.ge.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– 0557; 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. PO 00000 Frm 00014 Fmt 4702 Sfmt 4702 FOR FURTHER INFORMATION CONTACT: Scott Stevenson, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7132; fax: (781) 238–7199; email: Scott.M.Stevenson@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–2020–0557; Project Identifier AD–2020–00541–E’’ at the beginning of your comments. The FAA specifically invites comments on the overall regulatory, economic, environmental, and energy aspects of this NPRM. 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 (CBI) 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 FAA will also post a report summarizing each substantive verbal contact received about this proposed AD. 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 Scott Stevenson, 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. E:\FR\FM\08JNP1.SGM 08JNP1 34665 Federal Register / Vol. 85, No. 110 / Monday, June 8, 2020 / Proposed Rules Discussion The FAA issued AD 2018–15–04, Amendment 39–19336 (83 FR 43739, August 28, 2018), (‘‘AD 2018–15–04’’), for certain GE CF6–80A, CF6–80A1, CF6–80A2, CF6–80A3, CF6–80C2A1, CF6–80C2A2, CF6–80C2A3, CF6– 80C2A5, CF6–80C2A5F, CF6–80C2A8, CF6–80C2B1, CF6–80C2B1F, CF6– 80C2B2, CF6–80C2B2F, CF6–80C2B4, CF6–80C2B4F, CF6–80C2B5F, CF6– 80C2B6, CF6–80C2B6F, CF6– 80C2B6FA, CF6–80C2B7F, CF6– 80C2D1F, CF6–80C2L1F, and CF6– 80C2K1F model turbofan engines. AD 2018–15–04 requires a UI of HPT stage 1 and 2 disks. AD 2018–15–04 resulted from an uncontained failure of a HPT stage 2 disk that resulted in a fire. The FAA issued AD 2018–15–04 to prevent failure of the HPT stage 1 and the HPT stage 2 disks, uncontained HPT disk release, damage to the engine, and damage to the airplane. Actions Since AD 2018–15–04 Was Issued course of business or by the means identified in the ADDRESSES section. Since the FAA issued AD 2018–15– 04, GE determined that additional serial-numbered HPT stage 1 and stage 2 disks should be included in the population of affected disks. GE therefore issued revisions to its service information to include the additional affected disks. FAA’s Determination Related Service Information Under 1 CFR Part 51 Proposed AD Requirements The FAA reviewed GE CF6–80C2 Service Bulletin (SB) 72–1562 R04, dated May 29, 2019. The SB describes procedures for UI of CF6–80C2 turbofan engine HPT stage 1 and 2 disks. The FAA also reviewed GE CF6–80A SB 72– 0869 R02, dated May 29, 2019. The SB describes procedures for UI of CF6–80A turbofan engine HPT stage 2 disks. This service information is reasonably available because the interested parties have access to it through their normal Costs of Compliance The FAA is proposing this AD because the agency evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. This proposed AD would retain all the requirements of AD 2018–15–04. This proposed AD would expand the population of affected disks to include additional serial-numbered HPT stage 1 and stage 2 disks. The FAA estimates that this proposed AD affects 1,512 engines installed on airplanes, of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS Cost per product Action Labor cost Parts cost Ultrasonic Inspection of HPT disk .................. 10 work-hours × $85 per hour = $850. $0 ........................................... The FAA estimates the following costs to do any necessary replacements that would be required based on the results of the proposed inspection. The FAA has no way of determining the $850 Cost on U.S. operators $1,285,200 number of aircraft that might need these replacements: ON-CONDITION COSTS Action Labor cost Replace CF6–80C2 HPT Stage 1 disk ........................ Replace CF6–80C2 HPT Stage 2 disk ........................ Replace CF6–80A HPT Stage 2 disk .......................... 0.25 work-hours × $85 per hour = $21.25 ................... 0.25 work-hours × $85 per hour = $21.25 ................... 0.25 work-hours × $85 per hour = $21.25 ................... khammond on DSKJM1Z7X2PROD with PROPOSALS 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. VerDate Sep<11>2014 16:34 Jun 05, 2020 Jkt 250001 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: PO 00000 Frm 00015 Fmt 4702 Sfmt 4702 Parts cost $799,700 364,600 344,000 Cost per product $799,721.25 364,621.25 344,021.25 (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. 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: E:\FR\FM\08JNP1.SGM 08JNP1 34666 Federal Register / Vol. 85, No. 110 / Monday, June 8, 2020 / Proposed Rules 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 removing Airworthiness Directive AD 2018–15–04, Amendment 39–19336 (83 FR 43739, August 28, 2018), and adding the following new AD: ■ General Electric Company: Docket No. FAA– 2020–0557; Project Identifier AD–2020– 00541–E. (a) Comments Due Date The FAA must receive comments on this AD action by July 23, 2020. (b) Affected ADs This AD replaces AD 2018–15–04, Amendment 39–19336 (83 FR 43739, August 28, 2018). (c) Applicability This AD applies to General Electric Company (GE) CF6–80A, CF6–80A1, CF6– 80A2, CF6–80A3, CF6–80C2A1, CF6– 80C2A2, CF6–80C2A3, CF6–80C2A5, CF6– 80C2A5F, CF6–80C2A8, CF6–80C2B1, CF6– 80C2B1F, CF6–80C2B2, CF6–80C2B2F, CF6– 80C2B4, CF6–80C2B4F, CF6–80C2B5F, CF6– 80C2B6, CF6–80C2B6F, CF6–80C2B6FA, CF6–80C2B7F, CF6–80C2D1F, CF6– 80C2L1F, and CF6–80C2K1F model turbofan engines with high-pressure turbine (HPT) disks with serial numbers listed in Tables 1 and 2 of Appendix A in GE CF6–80C2 Service Bulletin (SB) 72–1562 R04, dated May 29, 2019; and Table 1 of Appendix A in GE CF6–80A SB 72–0869 R02, dated May 29, 2019. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. khammond on DSKJM1Z7X2PROD with PROPOSALS (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) After the effective date of this AD, perform an ultrasonic inspection for cracks in HPT stage 1 and 2 disks on the CF6–80C2 turbofan engine at each piece-part exposure using the Accomplishment Instructions, paragraph 3.A.(2), in GE CF6–80C2 SB 72– 1562 R04, dated May 29, 2019. (2) After the effective date of this AD, perform an ultrasonic inspection for cracks in 16:34 Jun 05, 2020 Jkt 250001 The reporting requirements specified in the Accomplishment Instructions, paragraphs 3.A.(2)(c) and 3.A.(2)(f), of CF6–80C2 SB 72– 1562 R04, dated May 29, 2019, are not required by this AD. (i) Definition For the purpose of this AD, ‘‘piece-part exposure’’ of the HPT stage 1 or stage 2 disk is separation of that HPT disk from its mating rotor parts within the HPT rotor module (thermal shield and HPT stage 1 and stage 2 disk, respectively). (j) 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 (k)(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 of the local flight standards district office/ certificate holding district office. (1) For more information about this AD, contact Scott Stevenson, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238– 7132; fax: (781) 238–7199; email: Scott.M.Stevenson@faa.gov. (2) For service information identified in this AD, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215, United States; phone: (513) 552–3272; email: aviation.fleetsupport@ae.ge.com; website: www.ge.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 June 1, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2020–12157 Filed 6–5–20; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2020–0551; Airspace Docket No. 20–ASW–6] RIN 2120–AA66 (h) Non-Required Actions (k) Related Information (e) Unsafe Condition This AD was prompted by an uncontained failure of an HPT stage 2 disk. The FAA is issuing this AD to prevent failure of the HPT stage 1 disk (CF6–80C2 engines) and the HPT stage 2 disk (CF6–80C2 and CF6–80A engines). The unsafe condition, if not addressed, could result in an uncontained HPT disk release, damage to the engine, and damage to the airplane. VerDate Sep<11>2014 HPT stage 2 disks on the CF6–80A turbofan engine at each piece-part exposure using the Accomplishment Instructions, paragraph 3.A.(2), in GE CF6–80A SB 72–0869 R02, dated May 29, 2019. (3) If any disk fails the inspection required by paragraphs (g)(1) and (2) of this AD, replace the disk before further flight. Proposed Revocation, Establishment, and Amendment of Class E Airspace; Multiple Texas Towns Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: This action proposes to revoke the Class E airspace extending upward from 700 feet above the surface at Ambassador Field, Big Sandy, TX; and establish and amend Class E airspace extending upward from 700 feet above the surface at several Texas airports. The FAA is proposing this action as the result of airspace reviews caused by the decommissioning of the Quitman VHF omnidirectional range (VOR) navigation aid, which provided navigation information for the instrument procedures these airports, as part of the VOR Minimum Operational Network (MON) Program. The names and geographic coordinates of several airports would also be updated to coincide with the FAA’s aeronautical database. DATES: Comments must be received on or before July 23, 2020. ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590; telephone (202) 366–9826, or (800) 647–5527. You must identify FAA Docket No. FAA–2020– 0551/Airspace Docket No. 20–ASW–6, at the beginning of your comments. You may also submit comments through the internet at https://www.regulations.gov. You may review the public docket containing the proposal, any comments received, and any final disposition in person in the Dockets Office between 9:00 a.m. and 5:00 p.m., Monday through Friday, except federal holidays. FAA Order 7400.11D, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at https://www.faa.gov/air_ traffic/publications/. For further information, you can contact the Airspace Policy Group, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; telephone: (202) 267–8783. The Order is SUMMARY: E:\FR\FM\08JNP1.SGM 08JNP1

Agencies

[Federal Register Volume 85, Number 110 (Monday, June 8, 2020)]
[Proposed Rules]
[Pages 34664-34666]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-12157]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0557; Project Identifier AD-2020-00541-E]
RIN 2120-AA64


Airworthiness Directives; General Electric Company Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2018-15-04, which applies to certain General Electric Company (GE) CF6-
80A, CF6-80A1, CF6-80A2, CF6-80A3, CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, 
CF6-80C2A5, CF6-80C2A5F, CF6-80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-
80C2B2, CF6-80C2B2F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F, CF6-80C2B6, 
CF6-80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2D1F, CF6-80C2L1F, and 
CF6-80C2K1F model turbofan engines. AD 2018-15-04 requires ultrasonic 
inspection (UI) of high-pressure turbine (HPT) stage 1 and stage 2 
disks. Since we issued AD 2018-15-04, GE determined the need to expand 
the population of affected disks. This proposed AD would retain the 
required inspections while expanding the population of affected disks. 
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 July 23, 
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 General 
Electric Company, 1 Neumann Way, Cincinnati, OH 45215, United States; 
phone: (513) 552-3272; email: [email protected]; website: 
www.ge.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-
0557; 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: Scott Stevenson, Aerospace Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
(781) 238-7132; 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-2020-0557; 
Project Identifier AD-2020-00541-E'' at the beginning of your comments. 
The FAA specifically invites comments on the overall regulatory, 
economic, environmental, and energy aspects of this NPRM. 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 (CBI) 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 FAA will also post a report summarizing each substantive 
verbal contact received about this proposed AD.

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 Scott Stevenson, 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.

[[Page 34665]]

Discussion

    The FAA issued AD 2018-15-04, Amendment 39-19336 (83 FR 43739, 
August 28, 2018), (``AD 2018-15-04''), for certain GE CF6-80A, CF6-
80A1, CF6-80A2, CF6-80A3, CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, CF6-
80C2A5, CF6-80C2A5F, CF6-80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-80C2B2, 
CF6-80C2B2F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F, CF6-80C2B6, CF6-
80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2D1F, CF6-80C2L1F, and CF6-
80C2K1F model turbofan engines. AD 2018-15-04 requires a UI of HPT 
stage 1 and 2 disks. AD 2018-15-04 resulted from an uncontained failure 
of a HPT stage 2 disk that resulted in a fire. The FAA issued AD 2018-
15-04 to prevent failure of the HPT stage 1 and the HPT stage 2 disks, 
uncontained HPT disk release, damage to the engine, and damage to the 
airplane.

Actions Since AD 2018-15-04 Was Issued

    Since the FAA issued AD 2018-15-04, GE determined that additional 
serial-numbered HPT stage 1 and stage 2 disks should be included in the 
population of affected disks. GE therefore issued revisions to its 
service information to include the additional affected disks.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed GE CF6-80C2 Service Bulletin (SB) 72-1562 R04, 
dated May 29, 2019. The SB describes procedures for UI of CF6-80C2 
turbofan engine HPT stage 1 and 2 disks. The FAA also reviewed GE CF6-
80A SB 72-0869 R02, dated May 29, 2019. The SB describes procedures for 
UI of CF6-80A turbofan engine HPT stage 2 disks. 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.

FAA's Determination

    The FAA is proposing this AD because the agency evaluated all the 
relevant information and determined the unsafe condition described 
previously is likely to exist or develop in other products of the same 
type design.

Proposed AD Requirements

    This proposed AD would retain all the requirements of AD 2018-15-
04. This proposed AD would expand the population of affected disks to 
include additional serial-numbered HPT stage 1 and stage 2 disks.

Costs of Compliance

    The FAA estimates that this proposed AD affects 1,512 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
----------------------------------------------------------------------------------------------------------------
Ultrasonic Inspection of HPT disk.  10 work-hours x $85    $0...................            $850      $1,285,200
                                     per hour = $850.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
replacements that would be required based on the results of the 
proposed inspection. The FAA has no way of determining the number of 
aircraft that might need these replacements:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                   Action                                 Labor cost                Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replace CF6-80C2 HPT Stage 1 disk..........  0.25 work-hours x $85 per hour =           $799,700     $799,721.25
                                              $21.25.
Replace CF6-80C2 HPT Stage 2 disk..........  0.25 work-hours x $85 per hour =            364,600      364,621.25
                                              $21.25.
Replace CF6-80A HPT Stage 2 disk...........  0.25 work-hours x $85 per hour =            344,000      344,021.25
                                              $21.25.
----------------------------------------------------------------------------------------------------------------

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) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

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:

[[Page 34666]]

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive AD 
2018-15-04, Amendment 39-19336 (83 FR 43739, August 28, 2018), and 
adding the following new AD:

General Electric Company: Docket No. FAA-2020-0557; Project 
Identifier AD-2020-00541-E.

(a) Comments Due Date

    The FAA must receive comments on this AD action by July 23, 
2020.

(b) Affected ADs

    This AD replaces AD 2018-15-04, Amendment 39-19336 (83 FR 43739, 
August 28, 2018).

(c) Applicability

    This AD applies to General Electric Company (GE) CF6-80A, CF6-
80A1, CF6-80A2, CF6-80A3, CF6-80C2A1, CF6-80C2A2, CF6-80C2A3, CF6-
80C2A5, CF6-80C2A5F, CF6-80C2A8, CF6-80C2B1, CF6-80C2B1F, CF6-
80C2B2, CF6-80C2B2F, CF6-80C2B4, CF6-80C2B4F, CF6-80C2B5F, CF6-
80C2B6, CF6-80C2B6F, CF6-80C2B6FA, CF6-80C2B7F, CF6-80C2D1F, CF6-
80C2L1F, and CF6-80C2K1F model turbofan engines with high-pressure 
turbine (HPT) disks with serial numbers listed in Tables 1 and 2 of 
Appendix A in GE CF6-80C2 Service Bulletin (SB) 72-1562 R04, dated 
May 29, 2019; and Table 1 of Appendix A in GE CF6-80A SB 72-0869 
R02, dated May 29, 2019.

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by an uncontained failure of an HPT stage 2 
disk. The FAA is issuing this AD to prevent failure of the HPT stage 
1 disk (CF6-80C2 engines) and the HPT stage 2 disk (CF6-80C2 and 
CF6-80A engines). The unsafe condition, if not addressed, could 
result in an uncontained HPT disk release, 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) After the effective date of this AD, perform an ultrasonic 
inspection for cracks in HPT stage 1 and 2 disks on the CF6-80C2 
turbofan engine at each piece-part exposure using the Accomplishment 
Instructions, paragraph 3.A.(2), in GE CF6-80C2 SB 72-1562 R04, 
dated May 29, 2019.
    (2) After the effective date of this AD, perform an ultrasonic 
inspection for cracks in HPT stage 2 disks on the CF6-80A turbofan 
engine at each piece-part exposure using the Accomplishment 
Instructions, paragraph 3.A.(2), in GE CF6-80A SB 72-0869 R02, dated 
May 29, 2019.
    (3) If any disk fails the inspection required by paragraphs 
(g)(1) and (2) of this AD, replace the disk before further flight.

(h) Non-Required Actions

    The reporting requirements specified in the Accomplishment 
Instructions, paragraphs 3.A.(2)(c) and 3.A.(2)(f), of CF6-80C2 SB 
72-1562 R04, dated May 29, 2019, are not required by this AD.

(i) Definition

    For the purpose of this AD, ``piece-part exposure'' of the HPT 
stage 1 or stage 2 disk is separation of that HPT disk from its 
mating rotor parts within the HPT rotor module (thermal shield and 
HPT stage 1 and stage 2 disk, respectively).

(j) 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 (k)(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 
of the local flight standards district office/certificate holding 
district office.

(k) Related Information

    (1) For more information about this AD, contact Scott Stevenson, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: (781) 238-7132; fax: (781) 238-7199; 
email: [email protected].
    (2) For service information identified in this AD, contact 
General Electric Company, 1 Neumann Way, Cincinnati, OH 45215, 
United States; phone: (513) 552-3272; email: 
[email protected]; website: www.ge.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 June 1, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-12157 Filed 6-5-20; 8:45 am]
 BILLING CODE 4910-13-P

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