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Federal Register / Vol. 86, No. 59 / Tuesday, March 30, 2021 / Rules and Regulations
Federal Register on October 23, 2020
85 FR 67465. The NPRM was prompted by MCAI originated by the European Union Aviation Safety Agency EASA, which is the Technical Agent for the Member States of the European Community. EASA has issued EASA AD
No. 20200096, dated April 29, 2020
referred to after this as the MCAI, to correct an unsafe condition for Pilatus Model PC24 airplanes. The MCAI
states:
An occurrence was reported where, before take-off after maintenance of a PC24
aeroplane, some electronic circuit breakers ECB were found in a LOCKED state.
This condition, if not corrected, could lead to a loss of power supply to equipment, without indication to the flight crew before take-off.
To address this potential unsafe condition, Pilatus issued the AFM temporary revision TR, as defined in this EASA AD, to provide operators with the necessary preflight check instructions.
For the reason described above, this EASA AD requires amendment of the AFM.

You may examine the MCAI in the AD docket at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0917.
In the NPRM, the FAA proposed to require revising the AFM to incorporate a procedure to check for the ECB status.
The FAA is issuing this AD to address the unsafe condition on these products.

Discussion of the Final Airworthiness Directive Comments The FAA received a comment from Pilatus. The following presents the comment received on the NPRM and the FAAs response to the comment.
Request To Refer to Revised Service Information Pilatus stated that the temporary revision referenced in the NPRM has been incorporated into page 439, dated October 7, 2020, of the Before Engine Start procedure 4PF04, in Section 4 of Pilatus PC24 Airplane Flight Manual, Report No. 02371, Issue 003 Revision 03, dated October 8, 2020
AFM Revision 03. Pilatus requested that the FAA change the proposed AD
to require using AFM Revision 03
instead of the temporary revision.
The FAA partially agrees. This AD
requires adding the language in the temporary revision. However, the FAA
has added wording to paragraph g of this AD to still allow compliance if later revisions of the AFM contain language identical to that in the temporary revision, such as the page referenced by the commenter.
Conclusion This product has been approved by the aviation authority of another country and is approved for operations in the United States. Pursuant to our
bilateral agreement with this state of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and service information reference above. The FAA reviewed the relevant data, considered the comment received, and determined that air safety requires adopting this AD as proposed.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products. Except for the changes described previously, this AD is adopted as proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Pilatus PC24
Temporary Revision 02371016 to PC
24 Airplane Flight Manual, PC24A
A1599003100A0030AA, dated November 1, 2019. The service information contains a step to be added to the pilot preflight procedures to check the ECB status. 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.
Costs of Compliance The FAA estimates that this AD
affects 30 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS
Action
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
Revise the AFM

1 work-hour $85 per hour = $85

$0

$85

$2,550

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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
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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 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.

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List of Subjects in 14 CFR Part 39
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.
39.13

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

20210601 Pilatus Aircraft Ltd.:
Amendment 3921467; Docket No.

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