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Federal Register / Vol. 86, No. 139 / Friday, July 23, 2021 / Rules and Regulations
are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with Canada, TCCA, its technical representative, has notified the FAA of the unsafe condition described in its AD. The FAA reviewed the relevant data, considered the comment received, 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. This service information specifies procedures to determine if an affected part is installed, and if an affected part is found, replacement with a non-affected part.
These documents are distinct since they apply to different helicopter models.
Bell Helicopter Alert Service Bulletin 20609123, Revision A, dated June 10, 2009.

Bell Helicopter Alert Service Bulletin 206L09157, Revision A, dated June 10, 2009.
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.
Costs of Compliance The FAA estimates that this AD
affects 1,493 helicopters of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
1 work-hour $85 per hour = $85

$303

$388

$579,284

khammond on DSKJM1Z7X2PROD with RULES

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 helicopters 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.

VerDate Sep<11>2014

15:54 Jul 22, 2021

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List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
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 adding the following new airworthiness directive:

20211506 Bell Textron Canada Limited Type Certificate Previously Held by Bell Helicopter Textron Canada Limited:
Amendment 3921653; Docket No.
FAA20100865; Project Identifier 2010SW061AD.
a Effective Date This airworthiness directive AD is effective August 27, 2021.
b Affected ADs None.
c Applicability This AD applies to the following Bell Textron Canada Limited type certificate previously held by Bell Helicopter Textron Canada Limited helicopters, certificated in any category:
1 Model 206A, serial numbers 004
through 660 inclusive, and 672 through 715
inclusive;
2 Model 206B, all serial numbers, including those converted from Model 206A;

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3 Model 206L, serial numbers 45004
through 45153 inclusive, and 46601 through 46617 inclusive;
4 Model 206L1, serial numbers 45154
through 45790 inclusive;
5 Model 206L3, serial numbers 51001
through 51612 inclusive; and 6 Model 206L4, all serial numbers.
d Subject Joint Aircraft Service Component JASC
Code: 65, Tail Rotor Drive.
e Unsafe Condition This AD was prompted by a report that a certain tail rotor disc assembly, sold as an alternate part, does not conform to the approved configuration. The FAA is issuing this AD to address helicopters operating with a certain tail rotor disc assembly, sold as an alternate part, that does not conform to the approved configuration, which could result in loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Do the actions specified in paragraphs g1 through 4 of this AD, in accordance with Bell Helicopter Alert Service Bulletin 20609123, Revision A, dated June 10, 2009; or Bell Helicopter Alert Service Bulletin 206L09157, Revision A, dated June 10, 2009, as applicable.
1 Within 30 days or 100 hours time-inservice TIS after the effective date of this AD, whichever occurs first, review the helicopter maintenance records to determine if a disc assembly, part number P/N
1015841 or 2, is installed.
2 If, during the maintenance records review required by paragraph g1 of this AD, you cannot positively determine that disc assembly P/N 1015841 or 2 is not installed, within 30 days or 100 hours TIS
after the effective date of this AD, whichever occurs first, inspect the tail rotor driveshaft system to determine if disc assembly P/N
1015841 or 2 is installed.

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