[Federal Register Volume 86, Number 110 (Thursday, June 10, 2021)]
[Rules and Regulations]
[Pages 30763-30766]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-12045]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0812; Project Identifier MCAI-2020-01317-A; 
Amendment 39-21561; AD 2021-10-28]
RIN 2120-AA64


Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all 
Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. This AD results 
from mandatory continuing airworthiness information (MCAI) originated 
by an aviation authority of another country to identify and correct an 
unsafe condition

[[Page 30764]]

on an aviation product. The MCAI identifies the unsafe condition as the 
need to revise certain airworthiness limitations and certification 
maintenance instructions. The FAA is issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective July 15, 2021.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of July 15, 
2021.

ADDRESSES: For service information identified in this final rule, 
contact Pilatus Aircraft Ltd., Customer Support General Aviation, CH-
6371 Stans, Switzerland; phone: +41 848 24 7 365; email: 
aircraft.com">[email protected]aircraft.com; website: https://www.pilatus-
aircraft.com. You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 901 Locust, 
Kansas City, MO 64106. For information on the availability of this 
material at the FAA, call (816) 329-4148.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2020-0812; or in person at 
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, 
except Federal holidays. The AD docket contains this final rule, the 
MCAI, any comments received, and other information. The address for 
Docket Operations is U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aviation Safety 
Engineer, FAA, General Aviation & Rotorcraft Section, International 
Validation Branch, 901 Locust, Room 301, Kansas City, MO 64106; phone: 
(816) 329-4059; fax: (816) 329-4090; email: [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to all Pilatus Model PC-24 
airplanes. The NPRM published in the Federal Register on March 11, 2021 
(86 FR 13838). The NPRM was based on MCAI from the European Union 
Aviation Safety Agency (EASA), which is the Technical Agent for the 
Member States of the European Union. EASA issued AD 2020-0202, dated 
September 22, 2020 (referred to after this as ``the MCAI'') to correct 
an unsafe condition for Pilatus Model PC-24 airplanes. The MCAI states:

    The airworthiness limitations and certification maintenance 
instructions for Pilatus PC-24 aeroplanes, which are approved by 
EASA, are currently defined and published in Pilatus PC-24 AMM 
[Aircraft Maintenance Manual] Chapter 04-00-00. These instructions 
have been identified as mandatory for continued airworthiness.
    Failure to accomplish these instructions could result in an 
unsafe condition.
    Previously, EASA issued AD 2020-0074, [dated March 27, 2020,] 
requiring the actions described in the Pilatus PC-24 AMM Chapter 04-
00-00, Document Number 02378 Issue 005 at Revision 14.
    Since that AD was issued, Pilatus published the ALS 
[Airworthiness Limitations section, at Issue 005 Revision 19], which 
contains the following new and/or more restrictive tasks as 
specified in Mandatory Structural Inspection Items data module PC24-
AA04-20-0000-00A-000A-A Issue 005 Revision 00:

--AL-27-00-025 and AL-27-00-026: Control column sprocket gear 
assembly, and
--AL-27-00-027: Control wheel column assembly.

    In addition, Airworthiness Limitations Description data module 
PC24-A-A04-00-0000-00A-040A-A Issue 008 Revision 00 includes:

--The new limit of validity following the completion of the Full 
Scale Fatigue Test, and
--Usage assumptions/conditions for operations on unpaved and grass 
runaways.

    EASA AD 2020-0074, dated March 27, 2020, required revising the 
Airworthiness Limitations section (ALS) to correct an error in the 
horizontal stabilizer primary trim system secondary power source 
operational test. The MCAI retains the requirements of EASA AD 2020-
0074, dated March 27, 2020, which the MCAI supersedes, and requires the 
additional revisions discussed previously. You may examine the MCAI in 
the AD docket at https://www.regulations.gov by searching for and 
locating Docket No. FAA-2020-0812.
    In the NPRM, the FAA proposed to require replacing the revised 
sections of the ALS described previously into the existing AMM or 
instructions for continued airworthiness. The FAA is issuing this AD to 
address the unsafe condition on these products.

Discussion of Final Airworthiness Directive

Comments

    The FAA received no comments on the NPRM or on the determination of 
the costs.

Conclusion

    This product has been approved by the aviation authority of another 
country and is approved for operation 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 referenced above. The FAA reviewed the relevant 
data 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. This AD is adopted as proposed in the 
NPRM.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Chapter 04, Airworthiness Limitations, Pilatus PC-
24 Aircraft Maintenance Manual (PC-24 AMM) Report 02378, Issue 005, 
Revision 19, dated May 26, 2020. This service information contains the 
parent data module and the new limit of validity and updates the usage 
assumptions and conditions for operations on unpaved and grass runways. 
This document also contains the revised subsections with revised 
maintenance actions.
    The FAA also reviewed Horizontal stabilizer primary trim system 
secondary power source--Operation test, data module PC24-A-E27-40-0000-
01A-320A-A, dated September 25, 2019, from PC-24 AMM Report 02378, 
Issue 005, Revision 19, dated May 26, 2020. This service information 
contains revised procedures for task number AL-27-40-022 in the 
certification maintenance requirements.
    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.

Costs of Compliance

    The FAA estimates that this AD will affect 42 products of U.S. 
registry. The FAA also estimates that it will take about 1 work-hour 
per product to comply with the requirements of this proposed AD. The 
average labor rate is $85 per work-hour.
    Based on these figures, the FAA estimates the cost of this AD on 
U.S. operators will be $3,570 or $85 per product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's 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

[[Page 30765]]

detail the scope of the Agency's 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 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2021-10-28 Pilatus Aircraft Ltd.: Amendment 39-21561; Docket No. 
FAA-2020-0812; Project Identifier MCAI-2020-01317-A.

(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 PC-24 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 PC24-A-A04-00-
0000-00A-040A-A, Issue 008, Revision 00, dated May 26, 2020, from 
Chapter 04, Airworthiness Limitations, Pilatus PC-24 Aircraft 
Maintenance Manual (PC-24 AMM) Report 02378, Issue 005, Revision 19, 
dated May 26, 2020.
    (ii) Mandatory structural inspection items, AMM data module 
PC24-A-A04-20-0000-00A-000A-A, Issue 005, Revision 00, dated May 26, 
2020, from Chapter 04, Airworthiness Limitations, Pilatus PC-24 
Aircraft Maintenance Manual (PC-24 AMM) Report 02378, Issue 005, 
Revision 19, dated May 26, 2020.
    (iii) Certification maintenance requirements, AMM data module 
PC24-A-A04-30-0000-00A-000A-A, Issue 007, Revision 00, dated October 
14, 2019, from Chapter 04, Airworthiness Limitations, Pilatus PC-24 
Aircraft Maintenance Manual (PC-24 AMM) Report 02378, Issue 005, 
Revision 19, dated May 26, 2020.
    (iv) Horizontal stabilizer primary trim system secondary power 
source--Operation test, AMM data module PC24-A-E27-40-0000-01A-320A-
A, dated September 25, 2019, from PC-24 AMM Report 02378, Issue 005, 
Revision 19, dated May 26, 2020. Your ALS must require this 
procedure for task number AL-27-40-022 in the certification 
maintenance requirements.

    Note 1 to paragraph (f)(1) of this AD: Pilatus PC-24 Aircraft 
Maintenance Manual, Airworthiness Limitations, AMM data module PC24-
A-A04-00-0000-00A-040A-A, Issue 008, Revision 00, dated May 26, 
2020, is the parent data module for Chapter 04 of the PC-24 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 PC-24 Aircraft 
Maintenance Manual (PC-24 AMM) Report 02378, Issue 005, Revision 19, 
dated May 26, 2020. Incorporating Pilatus PC-24 Aircraft Maintenance 
Manual, Airworthiness Limitations, AMM data module PC24-A-A04-00-
0000-00A-040A-A, 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 (f)(1) 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 43.9(a)(1) 
through (4), and 14 CFR 91.417(a)(2)(v). 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) 329-4059; fax: (816) 329-4090; 
email: [email protected]. 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 2020-
0202, 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. FAA-2020-0812.

(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. 552(a) 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 PC-24 
Aircraft Maintenance Manual

[[Page 30766]]

(PC-24 AMM) Report 02378, Issue 005, Revision 19, dated May 26, 
2020.
    (ii) Horizontal stabilizer primary trim system secondary power 
source--Operation test, AMM data module PC24-A-E27-40-0000-01A-320A-
A, dated September 25, 2019, from PC-24 AMM Report 02378, Issue 005, 
Revision 19, dated May 26, 2020.
    (3) For Pilatus Aircraft Ltd. service information identified in 
this AD, contact Pilatus Aircraft Ltd., Customer Support General 
Aviation, CH-6371 Stans, Switzerland; phone: +41 848 24 7 365; 
email: aircraft.com">[email protected]aircraft.com; website: https://
www.pilatus-aircraft.com.
    (4) You may view this service information at FAA, Airworthiness 
Products Section, Operational Safety Branch, 901 Locust, Kansas 
City, MO 64106. For information on the availability of this material 
at the FAA, call (816) 329-4148.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email: [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on May 7, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2021-12045 Filed 6-9-21; 8:45 am]
BILLING CODE 4910-13-P