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Federal Register / Vol. 86, No. 138 / Thursday, July 22, 2021 / Proposed Rules
750XL/36, effective date February 7, 2019 referred to after this as the MCAI, to correct an unsafe condition for certain Pacific Aerospace Limited Model 750XL airplanes. The MCAI
states:
DCA/750XL/36 is prompted by a review of the installation of the wing leading edge fuel pickup assemblies. It was found that the fuel pickup assemblies could have been installed in a pre-stressed condition, which could result in cracks in the wing spar web, or cracks in the fuel pickup pipe. The CAA AD
is issued to introduce the instructions in Pacific Aerospace Mandatory Service Bulletin MSB PACSB/XL/109 issue 1, dated 16 January 2019.

The MCAI requires inspecting the installation of the fuel pickup assembly and the wing spar web on both wings and, if any defects are found, taking all necessary corrective actions. You may examine the MCAI in the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210576.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Pacific Aerospace Mandatory Service Bulletin PACSB/XL/
109, Issue 1, dated January 16, 2019.
The service information contains procedures for inspecting the wing leading edge tank fuel pickup assembly to determine if the assembly is under stress and for additional inspections and corrective actions if necessary. 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.
FAAs Determination This product has been approved by the aviation authority of another country and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and service information referenced above. The FAA is issuing this NPRM after determining the unsafe condition described previously is likely to exist or develop on other products of the same type design.

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Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified in the service information already described.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 23

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airplanes of U.S. registry. The FAA also estimates that it would take about 1
work-hour per airplane to comply with the inspection that would be required by this proposed AD. The average labor rate is $85 per work-hour.
Based on these figures, the FAA
estimates the inspection cost of this proposed AD on U.S. operators to be $1,955, or $85 per airplane.
In addition, the FAA estimates that any necessary follow-on actions would take 4 work-hours and require parts costing $500, for a cost of $840 per airplane. The FAA has no way of determining the number of airplanes that may need these actions.
The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected operators.
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 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,
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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:

Pacific Aerospace Limited: Docket No. FAA
20210576; Project Identifier 2019CE
008AD.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by September 7, 2021.
b Affected ADs None.
c Applicability This AD applies to Pacific Aerospace Limited Model 750XL airplanes, serial numbers 177, 186 through 213, 220, 8001, and 8002, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 3600, Pneumatic System.
e Unsafe Condition This AD was prompted by mandatory continuing airworthiness information MCAI
originated by an aviation authority of another country to identify and address an unsafe condition on an aviation product. The MCAI
describes the unsafe condition as installation of the wing leading edge tank fuel pickup assembly in a pre-stressed condition, which could cause cracks in the wing spar web or the fuel pickup assembly pipe. The FAA is issuing this AD to prevent cracks in the wing spar web and the fuel pickup pipe. This condition could result in reduced structural integrity of the wing spar or cause a fuel leak, which could result in an engine fire.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Within 165 hours time-in-service after the effective date of this AD, inspect the angle of the support bracket on the wing leading edge
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