Voglio sapere a riguardo di…

53188

Federal Register / Vol. 86, No. 184 / Monday, September 27, 2021 / Rules and Regulations
adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products.
Related Service Information Under 1
CFR Part 51
EASA AD 20180292 requires a detailed inspection of the tail rotor slide assembly for corrosion and sign of circumferential refinishing and,
depending on the findings, applicable corrective actions. If there is any evidence of corrosion craters the corrective action is replacement of the affected part with a serviceable part. If there is any evidence of surface imperfections caused by circumferential refinishing but no evidence of corrosion, the corrective action is repetitive inspections of the tail rotor slide assembly for corrosion and signs of circumferential refinishing.
Replacement of an affected part with a
serviceable part is terminating action for the repetitive inspections.
This material 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 129 helicopters of U.S. Registry.
The FAA estimates the following costs to comply with this AD.

ESTIMATED COSTS
Action
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
Inspection

1 work-hour $85 per hour = $85

$0

$85

$10,965

The FAA estimates the following costs to do any necessary replacement that would be required based on the
results of the inspection. The agency has no way of determining the number of
aircraft that might need this replacement:

ON-CONDITION COSTS
Action
Labor cost
Replacement
Inspection

Up to 10 work-hours $85 per hour = $850
1 work-hour $85 per hour = $85 per inspection cycle

The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators.

lotter on DSK11XQN23PROD with RULES1

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
16:20 Sep 24, 2021

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 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:

This AD will not have federalism implications under Executive Order
VerDate Sep<11>2014

Parts cost
Jkt 253001

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

PO 00000

Frm 00004

Fmt 4700

Sfmt 4700

$23,200
0

39.13

Cost per product Up to $24,050.
$85 per inspection cycle.

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20211811 Leonardo S.p.a.: Amendment 3921712; Docket No. FAA20210507;
Project Identifier 2018SW117AD.
a Effective Date This airworthiness directive AD is effective November 1, 2021.
b Affected ADs None.
c Applicability This AD applies to Leonardo S.p.a. Model AB139 and AW139 helicopters, certificated in any category, with an affected part as identified in European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD 20180292, dated December 28, 2018 EASA AD 20180292.
d Subject Joint Aircraft Service Component JASC
Code: 6400, Tail Rotor System.
e Unsafe Condition This AD was prompted by a report that, during a post-flight inspection of an inservice helicopter, a tail rotor slider assembly was found fractured, and the bushing and the actuator rod in the tail rotor servo were partially damaged. The FAA is issuing this AD to address corrosion in the tail rotor slider assembly caused by improper refinishing characterized by signs of circumferential refinishing consistent with
E:FRFM27SER1.SGM

27SER1