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Federal Register / Vol. 86, No. 193 / Friday, October 8, 2021 / Proposed Rules
h Definitions
DEPARTMENT OF TRANSPORTATION

For the purpose of this AD:
1 An engine shop visit is the induction of an engine into the shop for maintenance involving the separation of pairs of major mating engine flanges, except that the separation of engine flanges solely for the purposes of transportation without subsequent engine maintenance does not constitute an engine shop visit.
2 A part eligible for installation is an HPT rotor stage 1 disk that is not listed in Figure 1 or Figure 2 to paragraph c of this AD or an HPT rotor stage 1 disk that has been repaired using an FAA-approved repair.
Note 1 to paragraph h2: Guidance for repairing the HPT rotor stage 1 disk can be found in GE Repair Document RD 150
1811P1, dated March 17, 2020.
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 j1 of this AD.
Information may be emailed to: ANE-ADAMOC@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
jspears on DSK121TN23PROD with PROPOSALS1

1 For more information about this AD, contact Scott Stevenson, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387132; fax: 781 2387759; email:
Scott.M.Stevenson@faa.gov.
2 For service information identified in this AD, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215;
phone: 513 5523272; email:
aviation.fleetsupport@ae.ge.com; website:
https www.ge.com. You may view this referenced service information at the FAA, Airworthiness Products Section, 1200
District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781 2387759.
Issued on September 30, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
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Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210872; Project Identifier MCAI202100312R
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to supersede Airworthiness Directive AD
20201105, which applies to all Airbus Helicopters Model EC120B helicopters.
AD 20201105 requires repetitive inspections of the tail rotor TR hub body for cracks and applicable corrective actions if necessary, and repetitive replacement of the attachment bolts, washers, and nuts of the TR hub body. This proposed AD would retain certain requirements of AD 20201105, add repetitive inspections, require additional corrective actions, and update applicable service information.
The FAA is proposing this AD to address the unsafe condition on these products.

SUMMARY:

The FAA must receive comments on this proposed AD by November 22, 2021.
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 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 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 Airbus Helicopters, 2701 North Forum Drive, Grand Prairie, TX 75052; telephone 972 6410000 or 800 2320323; fax 972 6413775; or at https www.airbus.com/helicopters/
services/technical-support.html. You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX
76177. For information on the DATES:

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availability of this material at the FAA, call 817 2225110.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210872; 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, the European Union Aviation Safety Agency EASA AD, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Ave., Suite 410, Westbury, NY
11590; telephone 516 2287330; email andrea.jimenez@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210872; Project Identifier MCAI202100312R 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 proposal 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 agency will also post a report summarizing each substantive verbal contact received about this NPRM.
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
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