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Federal Register / Vol. 86, No. 50 / Wednesday, March 17, 2021 / Rules and Regulations Do not add any additional burden upon the public than was already proposed in the NPRM.
The FAA also determined that these changes will not increase the economic burden on any operator or increase the scope of this final rule.

Conclusion The FAA reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this final rule with the changes described previously and minor 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
Related Service Information Under 1
CFR Part 51
EASA AD 20200085 describes procedures for modifying and re-

identifying the aft engine mount retainer assembly. 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 119 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Retained actions from AD 20181602
New actions

20 work-hours $85 per hour = $1,700
16 work-hours $85 per hour = $1,360

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.

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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

15:45 Mar 16, 2021

Jkt 253001

Parts cost
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of 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:
a. Removing Airworthiness Directive 20181602, Amendment 3919342 83
FR 39326, August 9, 2018, and b. Adding the following new airworthiness directive:

20210520 Airbus SAS: Amendment 39
21463; Docket No. FAA20200914;
Product Identifier 2020NM058AD.
a Effective Date This airworthiness directive AD is effective April 21, 2021.
b Affected ADs 1 This AD replaces AD 20181602, Amendment 3919342 83 FR 39326, August 9, 2018 AD 20181602.
2 This AD affects AD 20161409, Amendment 3918590 81 FR 44989, July 12, 2016 AD 20161409.
3 This AD affects AD 20170410, Amendment 3918805 82 FR 11791, February 27, 2017 AD 20170410.
c Applicability This AD applies to all the Airbus SAS
airplanes identified in paragraphs c1
through 4 of this AD, certificated in any category.

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$3,152
4,362

$4,852
5,722

Cost on U.S.
operators $577,388
680,918

1 Model A318111 and 112 airplanes.
2 Model A319111, 112, 113, 114, and 115 airplanes.
3 Model A320211, 212, 214, and 216
airplanes.
4 Model A321111, 112, 211, 212, and 213 airplanes.
d Subject Air Transport Association ATA of America Code 71, Powerplant.
e Reason
PART 39AIRWORTHINESS
DIRECTIVES

39.13

Cost per product
This AD was prompted by a report of a production quality deficiency on the inner retainer installed on link assemblies of the aft engine mount, which could result in failure of the retainer. The FAA is issuing this AD
to address non-conforming retainers of the aft engine mount. This condition could result in loss of the locking feature of the nuts of the inner and outer pins; loss of the pins will result in the aft mount engine link no longer being secured to the aft engine mount, possibly resulting in damage to the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Definition For the purposes of this AD, the production quality deficiency is defined as a dull finish, which is caused by surface finish pitting, and is an aggravating factor to crack initiation from vibration dynamic effect when compared with the bright surface finish.
h Requirements Except as specified in paragraph i of this AD: Comply with all required actions and compliance times specified in, and in accordance with, paragraphs 3 through 6, 8, 9, 11, and 12 of European Union Aviation Safety Agency EASA AD 2020
0085, dated April 6, 2020 EASA AD 2020
0085.

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