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Proposed Rules
Federal Register Vol. 86, No. 46
Thursday, March 11, 2021

This section of the FEDERAL REGISTER
contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201175; Product Identifier 2018SW071AD
RIN 2120AA64

Airworthiness Directives; Bell Textron Canada Limited Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to supersede Airworthiness Directive AD
20132013 for certain Bell Helicopter Textron Canada Limited now Bell Textron Canada Limited Bell Model 206B and 206L helicopters. AD 2013
2013 requires installing a placard beneath the engine power dual tachometer and revising the Operating Limitations section of the existing Rotorcraft Flight Manual RFM for your helicopter. Since the FAA issued AD
20132013, the engine manufacturer expanded the RPM N2 steady-state operation avoidance range limits. This proposed AD would retain certain requirements of AD 20132013, require revising certain sections of the existing RFM for your helicopter, and require either replacing or installing a placard.
The actions of this proposed AD are intended to address an unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by April 26, 2021.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Docket: Go to https www.regulations.gov. Follow the online instructions for sending your comments electronically.
Fax: 2024932251.
Mail: Send comments to the U.S.
Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200

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SUMMARY:

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New Jersey Avenue SE, Washington, DC
205900001.
Hand Delivery: Deliver to the Mail address between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
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. FAA2020
1175; 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 proposed AD, the Transport Canada AD, 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 service information identified in this proposed rule, contact Bell Textron Canada Limited, 12,800 Rue de lAvenir, Mirabel, Quebec J7J1R4; telephone 450
4372862 or 8003638023; fax 450
4330272; or at https
www.bellcustomer.com. You may view this referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX
76177.
FOR FURTHER INFORMATION CONTACT:
Michael Hughlett, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817
2225889; email Michael.Hughlett@
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.
FAA20201175; Product Identifier 2018SW071AD 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
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following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regualations.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 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 Michael Hughlett, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225889; email Michael.Hughlett@faa.gov. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Discussion The FAA issued AD 20132013, Amendment 3917619 78 FR 66252, November 5, 2013 for certain Bell Model 206B and 206L helicopters. AD
20132013 requires installing a placard beneath the engine power dual tachometer and revising the Operating Limitations section of the existing RFM
for your helicopter. AD 20132013 was prompted by several incidents of third stage engine turbine wheel failures, which were caused by excessive vibrations at certain engine speeds during steady-state operations. Those actions are intended to alert pilots to avoid certain engine speeds during steady-state operations, and prevent failure of the third stage engine turbine,
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