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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations the relevant data and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these helicopters.
Related Service Information Under 1
CFR Part 51
The FAA reviewed the following service information, which contains revised operating limitations and engine starting instructions:
Section 1, Operating Limitations, page 12A, of Bell Model 206B RFM
BHT206BFM1, Revision B54, dated May 30, 2018 BHT206BFM1.
Section 2, Normal Procedures, page 28 of BHT206BFM1.
Section 1, Limitations, page 15, of Bell Model 206B3 RFM BHT206B3
FM1, Revision 17, dated May 30, 2018
BHT206B3FM1.
Section 2, Normal Procedures, page 210 of BHT206B3FM1.
Section 1, Operating Limitations, page 14B, of Bell Model 206L RFM
BHT206LFM1, Revision 31, dated May 30, 2018 BHT206LFM1.
Section 2, Normal Procedures, page 210 of BHT206LFM1.
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 Bell Alert Service Bulletin ASB 20607115, Revision D, for Model 206A and 206B helicopters, and ASB 206L07146, Revision C, for Model 206L helicopters, each dated July 9, 2018. This service information contains procedures for installing a decal placard on the instrument panel below the Nr/N2 RPM dual tachometer indicator and inserting the RFM changes into the RFM.
Differences Between This AD and the Transport Canada AD

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Costs of Compliance The FAA estimates that this AD
affects 934 helicopters of U.S. Registry.
Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this AD.
Amending the existing RFM for your helicopter takes about 0.5 work-hour, for an estimated cost of $43 per helicopter and $40,162 for the U.S. fleet.
Installing or replacing a placard takes about 0.2 work-hour and parts cost
15:59 Jun 09, 2021

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Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs 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 Agencys 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 This AD will not have federalism implications under Executive Order 13132. This AD will 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 this AD:
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 Transport Canada AD requires compliance within 30 calendar days, while this AD requires compliance within 25 hours TIS.

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about $20, for a cost of $37 per helicopter.

The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by:

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a. Removing Airworthiness Directive AD 20132013, Amendment 39
17619 78 FR 66252, November 5, 2013;
and b. Adding the following new AD:

20211101 Bell Textron Canada Limited:
Amendment 3921563; Docket No.
FAA20201175; Product Identifier 2018SW071AD.
a Effective Date This airworthiness directive AD is effective July 15, 2021.
b Affected ADs This AD replaces AD 20132013, Amendment 3917619 78 FR 66252, November 5, 2013.
c Applicability This AD applies to the following Bell Textron Canada Limited Bell helicopters, certificated in any category:
1 Bell Model 206B, serial number S/N
004 through 4690 inclusive, including helicopters converted from Model 206A; and Note 1 to paragraph c1: Helicopters with a 206B3 designation are Model 206B
helicopters.
2 Bell Model 206L, S/N 45001 through 45153 inclusive, and 46601 through 46617
inclusive.
d Subject Joint Aircraft Service Component JASC
Code: 7250, Turbine Section.
e Unsafe Condition This AD defines the unsafe condition as a third stage turbine vibration. This condition could result in turbine failure, engine power loss, and subsequent loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Within 25 hours time-in-service after the effective date of this AD:
1 For Bell Model 206B helicopters:
i Revise the existing Rotorcraft Flight Manual RFM for your helicopter by inserting Section 1, Operating Limitations, page 12A, of Bell Model 206B RFM BHT
206BFM1, Revision B54, dated May 30, 2018 BHT206BFM1 or Section 1, Limitations, page 15, of Bell Model 206B3
RFM BHT206B3FM1, Revision 17, dated May 30, 2018 BHT206B3FM1, as applicable to your helicopter. Inserting a different document with Steady-state operation information identical to page 12A of BHT206BFM1 or page 15 of BHT206B3FM1, as applicable to your helicopter, is acceptable for compliance with the requirements of this paragraph.
ii Revise the existing RFM for your helicopter by inserting Section 2, Normal Procedures, page 28 of BHT206BFM1 or Section 2, Normal Procedures, page 210 of BHT206B3FM1, as applicable to your helicopter. Inserting a different document with Continuous Operation information
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