Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 10775 

in the AD docket on the internet at https:// 

www.regulations.gov by searching for and 

locating Docket No. FAA–2020–0969. 

(5) You may view this material that is 

incorporated by reference at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at NARA, email fedreg.legal@

nara.gov, or go to: https://www.archives.gov/ 

federal-register/cfr/ibr-locations.html. 

Issued on January 12, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03568 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0818; Project 

Identifier MCAI–2020–00987–A; Amendment 

39–21381; AD 2021–01–05] 

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 certain 

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 

on an aviation product. The MCAI 

identifies the unsafe condition as 

electrical harness installations on PC–24 

airplanes that are not in compliance 

with the approved design. This unsafe 

condition could lead to wire chafing 

and potential arcing or failure of wires 

having the incorrect length, possibly 

resulting in loss of system redundancy, 

or generation of smoke and smell, or 

loss of power plant fire protection 

function. This AD requires modifying 

the electrical harness installation. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective March 30, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 30, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact 

Pilatus Aircraft Ltd., CH–6371, Stans, 

Switzerland; phone: +41 848 24 7 365; 

email: techsupport.ch@pilatusaircraft.com; website: http://

www.pilatus-aircraft.com/. You may 

view this service information at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, Missouri 64106. For 

information on the availability of this 

material at the FAA, call 816–329–4148. 

It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0818. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0818; 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, Missouri 64106; 

phone: (816) 329–4059; fax: (816) 329– 

4090; email: doug.rudolph@faa.gov. 

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 certain serial-numbered Pilatus 

Model PC–24 airplanes. The NPRM 

published in the Federal Register on 

September 17, 2020 (85 FR 58002). 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 Union. EASA has 

issued EASA AD No. 2020–0158, dated 

July 16, 2020 (referred to after this as 

‘‘the MCAI’’), to address the unsafe 

condition on these products. The MCAI 

states: 

During production, electrical harness 

installations on some PC–24 aeroplanes were 

found not to comply with the approved 

design. 

This condition, if not corrected, could lead 

to wire chafing and potential arcing, or to 

failure of wires having the incorrect length, 

possibly resulting in loss of system 

redundancy, or generation of smoke and 

smell, or loss of power plant fire protection 

function. 

To address this potential unsafe condition, 

Pilatus issued the [service bulletin] SB, 

providing instructions to improve the 

electrical harness installations in the nose 

bay, cockpit, fuselage, wing fairing and rear 

fuselage areas. 

For the reason described above, this 

[EASA] AD requires modification of the 

electrical harness installations. 

The incorrect length wires are too 

short in length and do not have 

appropriate slack, which could lead to 

wires being pulled loose from the 

terminals during flight or ground 

operation. Generation of smell refers to 

the smell from electrical arcing. You 

may examine the MCAI in the AD 

docket at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2020–0818. 

In the NPRM, the FAA proposed to 

require modifying the electrical harness 

installation. 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 and the public interest require 

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 Pilatus PC–24 

Service Bulletin No. 91–001, dated 

April 7, 2020. The service information 

specifies procedures necessary to 

improve the electrical harness 

installation in the nose bay, cockpit, 

avionics rack, fuselage, wing fairing, 

and rear fuselage. 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 will 

affect 36 products of U.S. registry. The 

FAA also estimates that it will take 20 

10776 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 

work-hours per product to comply with 

the requirements of this AD. The 

average labor rate is $85 per work-hour. 

Required parts will cost about $75 per 

product. 

Based on these figures, the FAA 

estimates the cost of this AD on U.S. 

operators at $63,900, or $1,775 per 

product. 

The FAA has included all costs in this 

cost estimate. According to the 

manufacturer, however, some of the 

costs of this 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 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 

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 that 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. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of 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 

■ 1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

2021–01–05 Pilatus Aircraft Ltd.: 

Amendment 39–21381; Docket No. 

FAA–2020–0818; Project Identifier 

MCAI–2020–00987–A. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 30, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Pilatus Aircraft Ltd. 

Model PC–24 airplanes, serial numbers 101 

through 160 inclusive, certificated in any 

category. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 2497, ELECTRICAL POWER SYSTEM 

WIRING; 3197, INSTRUMENT SYSTEM 

WIRING. 

(e) Unsafe Condition 

This AD was prompted by electrical 

harness installations on some PC–24 

airplanes in production that did not comply 

with the approved design. The FAA is 

issuing this AD to prevent wire chafing and 

potential arcing or failure of wires having the 

incorrect length. The unsafe condition, if not 

addressed, could result in loss of system 

redundancy, electrical arcing, or loss of 

power plant fire protection. 

(f) Actions and Compliance 

Unless already accomplished, during the 

next annual inspection after the effective date 

of this AD or within 12 months after the 

effective date of this AD, whichever occurs 

later, modify the electrical harness 

installation in accordance with sections 3.A. 

through 3.H. of the Accomplishment 

Instructions in Pilatus PC–24 Service 

Bulletin No. 91–001, dated April 7, 2020. 

(g) Alternative Methods of Compliance 

(AMOCs) 

(1) 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, Aerospace 

Engineer, FAA, General Aviation & Rotorcraft 

Section, International Validation Branch, 901 

Locust, Room 301, Kansas City, Missouri 

64106; phone: (816) 329–4059; fax: (816) 

329–4090; email: doug.rudolph@faa.gov. 

(2) 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. 

(h) Related Information 

(1) Refer to European Union Aviation 

Safety Agency (EASA) AD No. 2020–0158, 

dated July 16, 2020, for more information. 

You may examine the EASA AD at https:// 

www.regulations.gov by searching for and 

locating Docket No. FAA–2020–0818. 

(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) Pilatus PC–24 Service Bulletin No. 91– 

001, dated April 7, 2020. 

(ii) [Reserved] 

(3) For Pilatus Aircraft Ltd service 

information identified in this AD, contact 

Pilatus Aircraft Ltd., CH–6371, Stans, 

Switzerland; phone: +41 848 24 7 365; email: 

techsupport.ch@pilatus-aircraft.com; 

website: http://www.pilatus-aircraft.com/. 

(4) You may view this service information 

at FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, Missouri 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: fedreg.legal@nara.gov, or go to: 

https://www.archives.gov/federal-register/cfr/ 

ibr-locations.html. 

Issued on December 30, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03511 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2019–0705; Product 

Identifier 2019–NM–098–AD; Amendment 

39–21396; AD 2021–02–13] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule.