Federal Register - August 3, 2021
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Source: Federal Register
41796
Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Proposed Rules ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per product
Up to 10 work-hours $85 per hour = Up to $850
$
Up to $850
Cost on U.S.
operators Up to $850.
The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the actions specified in this proposed AD.
The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected operators.
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.
responsibilities among the various levels of government.
For the reasons discussed above, I
certify this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would 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 Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 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.
Regulatory Findings
39.13
The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed 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
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Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:
De Havilland Aircraft of Canada Limited Type Certificate Previously Held by Bombardier, Inc.: Docket No. FAA
20210613; Project Identifier MCAI
202001431T.
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a Comments Due Date The FAA must receive comments on this airworthiness directive AD by September 17, 2021.
b Affected ADs None.
c Applicability This AD applies to De Havilland Aircraft of Canada Limited Model DHC8400, 401, and 402 airplanes, certificated in any category, serial numbers 4001, 4003, and subsequent.
d Subject Air Transport Association ATA of America Code 32, Landing Gear.
e Unsafe Condition This AD was prompted by a report of cracking found on a main landing gear MLG
drag strut assembly. The FAA is issuing this AD to address cracking of the MLG drag strut assembly and possible failure under compression loads during landing or ground operations, which could result in asymmetric MLG configuration and potential runway excursion.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Records Review, Repetitive Inspections, and On-Condition Actions Within 30 days after the effective date of this AD: Review the applicable airplane maintenance records to determine if any affected MLG drag strut assembly identified in figure 1 to the introductory text of paragraph g of this AD is installed. If any affected MLG drag strut assembly is installed, do the actions specified in paragraphs g1
and 2 of this AD.
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