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Federal Register / Vol. 86, No. 36 / Thursday, February 25, 2021 / Rules and Regulations Airworthiness Limitations Schedule, DMC429A04000000A288AA, Issue 1, dated January 10, 2019. This service information describes new maintenance requirements and airworthiness limitations.

Conclusion
editorial changes. The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and Do not add any additional burden upon the public than was already proposed in the NPRM.

The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for minor
Other Related Service Information Bell Helicopter has issued Bell Model 429 Maintenance Planning Information BHT429MPI, Chapter 4,
The FAA estimates that this AD
affects 85 helicopters of U.S. registry.
The FAA estimates the following costs to comply with this AD:

Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public.

Costs of Compliance
ESTIMATED COSTS FOR REQUIRED ACTIONS
Cost per helicopter
Labor cost
Parts cost
28 work-hours $85 per hour = $2,380

$42,576 $10,644 per bearing 4 blades

Authority for This Rulemaking
List of Subjects in 14 CFR Part 39

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.

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

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.

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Adoption of 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:

20210313 Bell Textron Canada Limited Type Certificate Previously Held by Bell Helicopter Textron Canada Limited:
Amendment 3921416; Docket No.
FAA20200860; Product Identifier 2019SW005AD.
a Effective Date This airworthiness directive AD is effective April 1, 2021.
b Affected ADs None.
c Applicability This AD applies to Bell Textron Canada Limited type certificate previously held by Bell Helicopter Textron Canada Limited Model 429 helicopters, certificated in any category, serial numbers 57001 through 57351 inclusive.
d Subject Joint Aircraft Service Component JASC
Code 6200, Main rotor system.

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$44,956

Cost on U.S.
operators $3,821,260

e Reason This AD was prompted by the introduction of a new life limit for the centrifugal force bearing CFB. The FAA is issuing this AD to address a CFB remaining in service beyond its fatigue life. Failure to observe the CFB life limit could result in excessive vibration and loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions For each CFB having part number 429
310003103 the affected CFB: Within 50
hours time-in-service, determine the accumulated retirement index number RIN.
For purposes of this AD, count 1 RIN each time one or both engines are started. If any affected CFB has accumulated 8,000 or more total RIN, before further flight, remove the affected CFB from service. If any affected CFB has accumulated less than 8,000 total RIN, create a component history card or equivalent record indicating a life limit of 8,000 total RIN. Thereafter, continue to count RIN and record the life limit of the affected CFB on its component history card or equivalent record and remove the affected CFB from service before accumulating 8,000
total RIN.
h Alternative Methods of Compliance AMOCs 1 The Manager, Strategic Policy Rotorcraft Section, 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 Strategic Policy Rotorcraft Section, send it to: Manager, Strategic Policy Rotorcraft Section, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225110. Information may be emailed to: 9-ASW-FTW-AMOCRequests@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector,
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