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Federal Register / Vol. 86, No. 193 / Friday, October 8, 2021 / Proposed Rules
under the FOIA, and they will not be placed in the public docket of this AD.
Submissions containing CBI should be sent to Doug Rudolph, Aviation Safety Engineer, FAA, General Aviation &
Rotorcraft Section, International Validation Branch, 901 Locust, Room 301, Kansas City, MO 64106. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The European Union Aviation Safety Agency EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20200252, dated November 12, 2020
referred to after this as the MCAI, to address the unsafe condition on these products. The MCAI states:
An occurrence was reported where an insufficient performance of the fuel drain system was detected on certain PC24
aeroplanes.
This condition, if not corrected, could lead, in case of a fuel leak, to contamination of the inboard rear fuselage, creating a fuel vapour which, in combination with an ignition source, could possibly result in a fire and consequent damage to the aeroplane.
To address this potential unsafe condition, Pilatus Aircraft issued the service bulletin SB providing instructions to modify the fuel drain pipe routing and to install a drain mast.
For the reason described above, this EASA AD requires modification of the fuel drain system.

You may examine the MCAI at https www.regulations.gov by searching for and locating Docket No.
FAA20210218.

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Related Service Information Under 1
CFR Part 51
The FAA reviewed Pilatus PC24
Service Bulletin No. 28003, Revision 1, dated January 23, 2020 Pilatus SB 28
003R1. This service information specifies procedures for modifying the fuel drain pipe routing and installing a drain mast.
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 us of the unsafe condition described in the MCAI and service information referenced above. The FAA is issuing this NPRM after determining that the
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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 described in the service information previously.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 36
airplanes of U.S. registry. The FAA also estimates that it would take about 12
work-hours per airplane to do the modification and installation of this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost about $1,950 per product.
Based on these figures, the FAA
estimates the cost of the proposed AD
on U.S. operators would be $106,920 or $2,970 per airplane.
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.

For the reasons discussed above, I
certify this proposed regulation:
1 Would not be 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.

Authority for This Rulemaking
39.13

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.

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

Pilatus Aircraft Ltd.: Docket No. FAA2021
0218; Project Identifier MCAI2020
01519A.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by November 22, 2021.
b Affected ADs None.
c Applicability This AD applies to Pilatus Aircraft Ltd.
Model PC24 airplanes, serial numbers 101
through 184, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 2830, Fuel Dump System.
e Reason This AD was prompted by mandatory continuing airworthiness information MCAI
originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI
describes the unsafe condition as insufficient performance of the fuel drain system that could lead to fire and damage of the airplane.
The FAA is issuing this AD to prevent fuel contamination of the inboard rear fuselage. If not addressed, this unsafe condition, in combination with an ignition source, could result in fire and loss of control of the airplane.

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