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Federal Register / Vol. 86, No. 43 / Monday, March 8, 2021 / Rules and Regulations designated as CBI will be placed in the public docket for this rulemaking.
Regulatory Flexibility Act RFA
The requirements of the RFA do not apply when an agency finds good cause
13167

Costs of Compliance
pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment.
Because the FAA has determined that it has good cause to adopt this rule without notice and comment, RFA
analysis is not required.

The FAA estimates that this AD
affects 650 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
7 work-hour $85 per hour = $595

$0

$595

$386,750

Labor cost
Parts cost
Cost per product
8 work-hours $85 per hour = $680

$7,300

$7,980

ESTIMATED COSTS FOR OPTIONAL ACTIONS

The FAA estimates the following costs to do any necessary on-condition action that would be required based on
the results of any required or optional actions. The FAA has no way of determining the number of helicopters
that might need this on-condition action:

ON-CONDITION COSTS
Action
Labor cost
Replacement

4 work-hours $85 per hour = $340

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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 The FAA determined that this AD
would not have federalism implications under Executive Order 13132. This AD
would 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.

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16:10 Mar 05, 2021

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For the reasons discussed above, I
certify this regulation:
1 Is not a significant regulatory action under Executive Order 12866, and 2 Will not affect intrastate aviation in Alaska.
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:

1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20210415 Airbus Helicopters:
Amendment 3921437; Docket No.
FAA20210094; Project Identifier MCAI202100100R.

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$17,052

Cost per product $17,392

a Effective Date This airworthiness directive AD becomes effective March 23, 2021.
b Affected ADs None.
c Applicability This AD applies to Airbus Helicopters specified in paragraph c1 and 2 of this AD, certificated in any category.
1 Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP
helicopters, all serial numbers.
2 Model AS350B3 helicopters, all serial numbers except those that have embodied Modification 07.3148 in production, or Eurocopter AS350 Service Bulletin 55.00.14
any revision in service.
d Subject Joint Aircraft System Component JASC
Code 5531, Vertical Stabilizer, Spar/Rib.

PART 39AIRWORTHINESS
DIRECTIVES

39.13

Parts cost
e Reason This AD was prompted by a report that, during an unscheduled post-flight inspection of the tail cone area of an Airbus Helicopters Model AS355NP helicopter, a crack was found in the spar of the upper fin and fractures were found in the two front attachment screws. The FAA is issuing this AD to address cracking in the spar of the upper part of the vertical fin and fractures in the front attachment screws. This condition could lead to in-flight separation of the upper part of the vertical fin, resulting in loss of control of the helicopter.

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