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Federal Register / Vol. 86, No. 121 / Monday, June 28, 2021 / Proposed Rules
i Before the part accumulates 40,000
equivalent air time hours, or ii Within 12 months after the effective date of this AD.
3 For airplanes with a maximum certificated gross weight that has ever exceeded 8,000 pounds: Remove from service each left and right hand wing strut fitting and tie-bar by following the Accomplishment Instructions in Viking Air Limited SB V3/
0008, Revision NC, dated February 9, 2017, and the Replacement section of the Accomplishment instructions in De Havilland Aircraft of Canada DHC3 Otter Service Bulletin Number 3/37, Revision B, dated October 8, 1982, at whichever of the following compliance time that occurs later:
i Before the part accumulates 32,200
equivalent air time hours, or ii Within 12 months after the effective date of this AD.
g Alternative Methods of Compliance AMOCs 1 The Manager, New York 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 ACO Branch, send it to the attention of the person identified in paragraph h1 of this AD.
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.

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h Related Information 1 For more information about this AD, contact Aziz Ahmed, Aviation Safety Engineer, New York ACO Branch, FAA, 1600
Stewart Avenue, Suite 410, Westbury, NY
11590; phone: 516 2877329; fax: 516
7945531; email: aziz.ahmed@faa.gov.
2 Refer to Transport Canada AD Number CF201729, dated August 24, 2017, for more information. You may examine the Transport Canada AD in the AD docket at https
www.regulations.gov by searching for and locating it in Docket No. FAA20210214.
3 For service information identified in this AD, contact Viking Air Limited Technical Support, 1959 De Havilland Way, Sidney, British Columbia, Canada, V8L 5V5;
phone: North America 800 6638444; fax:
250 6560673; email: technical.support@
vikingair.com; website: https
www.vikingair.com/support/service-bulletins.
You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call 816 3294148.
Issued on June 21, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210513; Project Identifier 2018SW116AD
RIN 2120AA64

Airworthiness Directives; Bell Textron Canada Limited Type Certificate Previously Held by Bell Helicopter Textron Canada Limited Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to adopt a new airworthiness directive AD for certain Bell Textron Canada Limited Bell Model 429 helicopters. This proposed AD was prompted by reports of tail rotor gearbox assemblies found loose on the gearbox support. This proposed AD would require repetitive torque checks of the tail rotor gearbox attachment hardware, and corrective action if necessary. 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 August 12, 2021.
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 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 between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact Bell Textron Canada Limited, 12,800 Rue de lAvenir, Mirabel, Quebec J7J 1R4, Canada;
telephone 14504372862 or 1800
3638023; fax 14504330272; email productsupport@bellflight.com; or at https www.bellflight.com/support/
contact-support. 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 availability of this material at the FAA, call 817 222
5110.

ADDRESSES:

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Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210513; 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 Transport Canada AD, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Darren Gassetto, Aerospace Engineer, COS Program Management Section, FAA, Operational Safety Branch, Compliance & Airworthiness Division, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516
2287323; email Darren.Gassetto@
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.
FAA20210513; Project Identifier 2018SW116AD 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 page of your submission containing CBI
as PROPIN. The FAA will treat such
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