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Federal Register / Vol. 86, No. 33 / Monday, February 22, 2021 / Rules and Regulations
AD HB2019004 including its correction, which is superseded, and requires accomplishment of the actions specified in the ALS.

You may examine the MCAI in the AD docket at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0849.
The NPRM proposed to require revising the ALS of the existing AMM
to introduce the new mandatory repetitive inspections for the flap pivot arm assemblies and for certain wing angle brackets, and to implement a change to the Oxygen cylinder and pressure reducer task item. The FAA is issuing this AD to address the unsafe condition on these products.
Comments The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion The FAA reviewed the relevant data and determined that air safety and the
public interest require adopting this AD
as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Except for minor editorial changes, this AD is adopted as proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
Pilatus Aircraft Ltd. has issued Section 051010, Lifed and Overhauled Components, dated June 30, 2020, of Chapter 05, Time Limits/
Maintenance Checks, of the Pilatus PC
7 Maintenance Manual. This document provides updated limitations, inspections, and procedures for the airworthiness limitations in chapter 5 of the existing AMM. This service information contains new mandatory repetitive inspections for the flap pivot arm assemblies and for the wing angle brackets on middle rib 23, and a change to the oxygen cylinder and pressure reducer task item to remove the reference to the part numbers.

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.
Differences Between This AD and the MCAI
The MCAI requires incorporating all of the updated Chapter 050000 for the Swiss State of Design type certificate because they deem the complete chapter 5 as the mandatory ALS of the PC7
AMM. This AD only requires Section 051010, Lifed and Overhauled Components, dated June 30, 2020, of Chapter 05, Time Limits/Maintenance Checks, of the Pilatus PC7
Maintenance Manual, because it is the only mandatory section of the ALS for the U.S. type certificate.
Costs of Compliance The FAA estimates that this AD
affects 18 airplanes 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-hours $85 per hour = $85

$0

$85

$1,530

Authority for This Rulemaking
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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 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
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distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify 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.

39.13

List of Subjects in 14 CFR Part 39

c Applicability This AD applies to Pilatus Aircraft Ltd.
Model PC7 airplanes, all serial numbers, certificated in any category.

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.

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

20202619 Pilatus Aircraft Ltd:
Amendment 3921374; Docket No.
FAA20200849; Project Identifier MCAI202001036A.
a Effective Date This airworthiness directive AD is effective March 29, 2021.
b Affected ADs None.

d Subject Air Transport Association ATA of America Code 05, Time Limits/Maintenance Checks.
e Reason This AD was prompted by the need to revise the Airworthiness Limitation section of the existing aircraft maintenance manual AMM. The FAA is issuing this AD to revise the Airworthiness Limitations section of the existing AMM to introduce new mandatory repetitive inspections for the flap pivot arm assemblies and for the wing angle brackets on middle rib 23, and to implement a change to
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