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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 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 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 have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
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.
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:

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Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

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

20211028 Pilatus Aircraft Ltd.:
Amendment 3921561; Docket No.
FAA20200812; Project Identifier MCAI202001317A.

VerDate Sep<11>2014

15:59 Jun 09, 2021

Jkt 253001

a Effective Date This airworthiness directive AD is effective July 15, 2021.
b Affected ADs None.
c Applicability This AD applies to Pilatus Aircraft Ltd.
Model PC24 airplanes, all serial numbers, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 2740: Stabilizer Control System.
e Reason This AD was prompted by the need to revise the Airworthiness Limitations section ALS of the existing aircraft maintenance manual AMM to add new and more restrictive tasks for the control column sprocket gear assembly and control wheel column assembly, to address the new limit of validity and update the usage assumptions and conditions for operations on unpaved and grass runways, and to correct an error in the horizontal stabilizer primary trim system secondary power source operational test. The FAA is issuing this AD to prevent reduction in the structural integrity of the airframe and components, as well as an unrecognized failure of the manual pitch trim. These conditions, if not addressed, could result in loss of airplane control.
f Actions and Compliance 1 Before further flight, unless already done, revise the ALS of the existing AMM or instructions for continued airworthiness ICA for your airplane by incorporating the following documents.
i Airworthiness Limitations, AMM data module PC24AA0400000000A040A
A, Issue 008, Revision 00, dated May 26, 2020, from Chapter 04, Airworthiness Limitations, Pilatus PC24 Aircraft Maintenance Manual PC24 AMM Report 02378, Issue 005, Revision 19, dated May 26, 2020.
ii Mandatory structural inspection items, AMM data module PC24AA04200000
00A000AA, Issue 005, Revision 00, dated May 26, 2020, from Chapter 04, Airworthiness Limitations, Pilatus PC24
Aircraft Maintenance Manual PC24 AMM
Report 02378, Issue 005, Revision 19, dated May 26, 2020.
iii Certification maintenance requirements, AMM data module PC24A
A0430000000A000AA, Issue 007, Revision 00, dated October 14, 2019, from Chapter 04, Airworthiness Limitations, Pilatus PC24 Aircraft Maintenance Manual PC24 AMM Report 02378, Issue 005, Revision 19, dated May 26, 2020.
iv Horizontal stabilizer primary trim system secondary power sourceOperation test, AMM data module PC24AE2740
000001A320AA, dated September 25, 2019, from PC24 AMM Report 02378, Issue 005, Revision 19, dated May 26, 2020. Your ALS must require this procedure for task number AL2740022 in the certification maintenance requirements.
Note 1 to paragraph f1 of this AD:
Pilatus PC24 Aircraft Maintenance Manual,
PO 00000

Frm 00013

Fmt 4700

Sfmt 4700

30765

Airworthiness Limitations, AMM data module PC24AA0400000000A040A
A, Issue 008, Revision 00, dated May 26, 2020, is the parent data module for Chapter 04 of the PC24 AMM and consists of four subsections sub-data modules. The parent data module and four sub-data modules comprise the complete ALS of Chapter 04, Airworthiness Limitations, Pilatus PC24
Aircraft Maintenance Manual PC24 AMM
Report 02378, Issue 005, Revision 19, dated May 26, 2020. Incorporating Pilatus PC24
Aircraft Maintenance Manual, Airworthiness Limitations, AMM data module PC24A
A0400000000A040AA, Issue 008
Revision 00, dated May 26, 2020, and all four subsections listed in Section 1 General, is acceptable, but not required, for compliance with this AD.
2 As of the effective date of this AD, except as provided in paragraph g of this AD, no alternative replacement times, inspection intervals, or tasks may be approved for the affected parts.
3 The actions required by paragraph f1
of this AD may be performed by the owner/
operator pilot holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9a1
through 4, and 14 CFR 91.417a2v. The record must be maintained as required by 14
CFR 91.417, 121.380, or 135.439.
g Alternative Methods of Compliance AMOCs The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to Doug Rudolph, Aviation Safety Engineer, FAA, General Aviation &
Rotorcraft Section, International Validation Branch, 901 Locust, Room 301, Kansas City, MO 64106; phone: 816 3294059; fax: 816
3294090; email: doug.rudolph@faa.gov.
Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector PI in the FAA Flight Standards District Office FSDO, or lacking a PI, your local FSDO.
Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.
h Related Information Refer to European Union Aviation Safety Agency EASA AD 20200202, dated September 22, 2020, for more information.
You may examine the EASA AD at https
www.regulations.gov by searching for and locating Docket No. FAA20200812.
i Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
i Chapter 04, Airworthiness Limitations, Pilatus PC24 Aircraft Maintenance Manual
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