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Federal Register / Vol. 86, No. 112 / Monday, June 14, 2021 / Proposed Rules described in the MCAI and service information referenced above. The FAA
is proposing this AD because the FAA
evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified in the service information already described.

31455

Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 433
airplanes of U.S. registry. The FAA
estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
7 work-hours $85 per hour = $595

$0

$595

$257,635

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

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per product
6 work-hours $85 per hour = $510

$2,435

$2,945

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.

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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 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
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on the distribution of power and 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.
39.13

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

Bombardier, Inc.: Docket No. FAA2021
0462; Project Identifier MCAI2020
01714T.

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a Comments Due Date The FAA must receive comments on this airworthiness directive AD by July 29, 2021.
b Affected ADs None.
c Applicability This AD applies to Bombardier, Inc., Model CL6002B16 604 Variant airplanes, serial numbers S/N 5301 through 5665
inclusive, 5701 through 5988 inclusive, and 6050 through 6999 inclusive, certificated in any category.
d Subject Air Transport Association ATA of America Code 32, Landing gear.
e Unsafe Condition This AD was prompted by multiple reports of cracking of the main landing gear MLG
shock strut lower pin. The FAA is issuing this AD to address cracking of the MLG shock strut lower pin. If not addressed, this condition could result in structural failure of one or both MLG.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Repetitive Lubrication Within 200 flight hours FH or 12 months after the effective date of this AD, whichever occurs first, lubricate the left-hand LH and right-hand RH MLG shock strut lower pins having part number P/N 191463, in accordance with paragraph 2.B., Part A, of the Accomplishment Instructions of the applicable service bulletin, as specified in paragraphs g1 through 3 of this AD.
Repeat thereafter at intervals not to exceed 200 FH or 12 months, whichever occurs first.

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