Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Rules and Regulations 82899 

(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/ibrlocations.html. 

Issued on December 7, 2020. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2020–28029 Filed 12–18–20; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0729; Project 

Identifier AD–2020–00620–E; Amendment 

39–21355; AD 2020–25–13] 

RIN 2120–AA64 

Airworthiness Directives; CFM 

International, S.A. Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

CFM International, S.A. (CFM) LEAP– 

1A23, LEAP–1A24, LEAP–1A24E1, 

LEAP–1A26, LEAP–1A26CJ, LEAP– 

1A26E1, LEAP–1A29, LEAP–1A29CJ, 

LEAP–1A30, LEAP–1A32, LEAP–1A33, 

LEAP–1A33B2, LEAP–1A35A model 

turbofan engines. This AD was 

prompted by an investigation by CFM 

that showed a subsurface anomaly in a 

part manufactured using the same 

material as the LEAP–1A high-pressure 

turbine (HPT) stage 2 disk. This AD 

requires an ultrasonic inspection (UI) of 

the HPT stage 2 disk and replacement of 

any HPT stage 2 disk that fails the UI 

with a part eligible for installation. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective January 25, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 25, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact CFM 

International, S.A., Aviation Operations 

Center, 1 Neumann Way, M/D Room 

285, Cincinnati, OH 45125; phone: (877) 

432–3272; email: fleetsupport@ge.com. 

You may view this service information 

at the FAA, Airworthiness Products 

Section, Operational Safety Branch, 

1200 District Avenue, Burlington, MA 

01803. For information on the 

availability of this material at the FAA, 

call (781) 238–7759. It is also available 

at https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0729. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0729; 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, 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: 

Christopher McGuire, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7120; fax: (781) 238– 

7199; email: Chris.McGuire@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 CFM International, S.A. 

LEAP–1A23, LEAP–1A24, LEAP– 

1A24E1, LEAP–1A26, LEAP–1A26CJ, 

LEAP–1A26E1, LEAP–1A29, LEAP– 

1A29CJ, LEAP–1A30, LEAP–1A32, 

LEAP–1A33, LEAP–1A33B2, LEAP– 

1A35A model turbofan engines. The 

NPRM published in the Federal 

Register on July 24, 2020 (85 FR 44798). 

The NPRM was prompted by an 

investigation by CFM that showed a 

subsurface anomaly in a part 

manufactured using the same material 

as the LEAP–1A HPT stage 2 disk. In the 

NPRM, the FAA proposed to require an 

UI of the HPT stage 2 disk and 

replacement of any HPT stage 2 disk 

that fails the UI with a part eligible for 

installation. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

one commenter, the Air Line Pilots 

Association, International. The 

commenter supported the NPRM 

without change. 

Conclusion 

The FAA reviewed the relevant data, 

considered the comment received, and 

determined that air safety requires 

adopting the AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial 

changes, this AD is adopted as proposed 

in the NPRM. 

Related Service Information Under 1 

CFR part 51 

The FAA reviewed CFM Service 

Bulletin LEAP–1A–72–00–0405–01A– 

930A–D, Issue 001, dated March 5, 

2020. The Service Bulletin specifies 

procedures for performing an UI of the 

HPT stage 2 disk. 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 ADDRESSES. 

Costs of Compliance 

The FAA estimates that this AD 

affects 148 engines installed on 

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 

UI of HPT stage 2 disk ................................... 8 work-hours × $85 per hour = $680 ............. $0 $680 $100,640 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the inspection. The agency has 

no way of determining the number of 

aircraft that might need these 

replacements. 

82900 Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Rules and Regulations 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per product 

Replace HPT stage 2 disk in case of failed inspection .25 work-hours × $85 per hour = $21.25 ..................... $286,000 $286,021.25 

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. 

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: 

2020–25–13 CFM International, S.A.: 

Amendment 39–21355; Docket No. 

FAA–2020–0729; Project Identifier AD– 

2020–00620–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective January 25, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to CFM International, S.A. 

(CFM) LEAP–1A23, LEAP–1A24, LEAP– 

1A24E1, LEAP–1A26, LEAP–1A26CJ, LEAP– 

1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP– 

1A30, LEAP–1A32, LEAP–1A33, LEAP– 

1A33B2, LEAP–1A35A model turbofan 

engines with a high-pressure turbine (HPT) 

stage 2 disk, part number (P/N) 2466M52G03 

or P/N 2788M26G01, and with a serial 

number listed in Table 1 of CFM Service 

Bulletin (SB) LEAP–1A–72–00–0405–01A– 

930A–D, Issue 001, dated March 5, 2020, 

installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by an investigation 

by CFM that discovered a subsurface 

anomaly in a part manufactured from the 

same material used to manufacture the 

LEAP–1A HPT stage 2 disk. The FAA is 

issuing this AD to prevent failure of the 

LEAP–1A HPT stage 2 disk. The unsafe 

condition, if not addressed, could result in 

uncontained release of the HPT stage 2 disk, 

damage to the engine, and damage to the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) At the next piece part exposure after the 

effective date of this AD, perform an 

ultrasonic inspection of the HPT stage 2 disk 

in accordance with the Accomplishment 

Instructions, paragraph 5.A.(1), of CFM SB 

LEAP–1A–72–00–0405–01A–930A–D, Issue 

001, dated March 5, 2020. 

(2) Replace any disk that fails the 

inspection required by paragraph (g)(1) of 

this AD with a part eligible for installation. 

(h) Definition 

For the purpose of this AD, a part eligible 

for installation is an HPT stage 2 disk not 

affected by this AD, or an HPT stage 2 disk 

that has been inspected in accordance with 

the Accomplishment Instructions, paragraph 

5.A.(1), of CFM SB LEAP–1A–72–00–0405– 

01A–930A–D, Issue 001, dated March 5, 

2020, and is not rejected by the inspection 

limits as specified in the service information. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO Branch, FAA, has 

the authority to approve AMOCs for this AD, 

if requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to the attention of the person 

identified in Related Information. You may 

email your request to: ANE-AD-AMOC@

faa.gov. 

(2) 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. 

(j) Related Information 

For more information about this AD, 

contact Christopher McGuire, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7120; fax: (781) 238–7199; email: 

Chris.McGuire@faa.gov. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) 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) CFM Service Bulletin LEAP–1A–72–00– 

0405–01A–930A–D, Issue 001, dated March 

5, 2020. 

(ii) [Reserved] 

(3) For CFM service information identified 

in this AD, contact CFM International, S.A., 

Aviation Operations Center, 1 Neumann 

Way, M/D Room 285, Cincinnati, OH 45125; 

phone: (877) 432–3272; email: fleetsupport@

ge.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

Federal Register / Vol. 85, No. 245 / Monday, December 21, 2020 / Rules and Regulations 82901 

information on the availability of this 

material at the FAA, call (781) 238–7759. 

(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 4, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2020–27985 Filed 12–18–20; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0778; Product 

Identifier 2020–NM–097–AD; Amendment 

39–21362; AD 2020–26–07] 

RIN 2120–AA64 

Airworthiness Directives; Dassault 

Aviation Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2019–23– 

05, which applied to all Dassault 

Aviation Model MYSTERE–FALCON 

900 airplanes. AD 2019–23–05 required 

revising the existing maintenance or 

inspection program, as applicable, to 

incorporate new or more restrictive 

airworthiness limitations. This AD 

continues to require revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

those new or more restrictive 

airworthiness limitations, and also 

requires revising the existing 

maintenance or inspection program, as 

applicable, to incorporate additional 

new or more restrictive airworthiness 

limitations; as specified in a European 

Union Aviation Safety Agency (EASA) 

AD, which is incorporated by reference. 

This AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective January 25, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 25, 2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of January 13, 2020 (84 FR 

67169, December 9, 2019). 

ADDRESSES: For EASA material 

incorporated by reference (IBR) in this 

AD, contact the EASA, KonradAdenauer-Ufer 3, 50668 Cologne, 

Germany; phone: +49 221 8999 000; 

email: ADs@easa.europa.eu; internet: 

www.easa.europa.eu. You may find this 

IBR material on the EASA website at 

https://ad.easa.europa.eu. For Dassault 

service information identified in this 

final rule, contact Dassault Falcon Jet 

Corporation, Teterboro Airport, P.O. 

Box 2000, South Hackensack, NJ 07606; 

phone: 201–440–6700; internet: https:// 

www.dassaultfalcon.com. You may 

view this IBR material at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

It is also available in the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0778. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0778; 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, 

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: Tom 

Rodriguez, Aerospace Engineer, Large 

Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th St., Des Moines, WA 98198; 

phone and fax: 206–231–3226; email: 

tom.rodriguez@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The EASA, which is the Technical 

Agent for the Member States of the 

European Union, has issued EASA AD 

2020–0115, dated May 20, 2020 (EASA 

AD 2020–0115) (also referred to as the 

Mandatory Continuing Airworthiness 

Information, or the MCAI), to correct an 

unsafe condition for all Dassault 

Aviation Model MYSTERE–FALCON 

900 airplanes. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2019–23–05, 

Amendment 39–19799 (84 FR 67169, 

December 9, 2019) (AD 2019–23–05). 

AD 2019–23–05 applied to all Dassault 

Aviation Model MYSTERE–FALCON 

900 airplanes. The NPRM published in 

the Federal Register on August 19, 2020 

(85 FR 50970). The NPRM was 

prompted by a determination that new 

or more restrictive airworthiness 

limitations are necessary. The NPRM 

proposed to continue to require revising 

the existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations. The NPRM also proposed to 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate additional 

new or more restrictive airworthiness 

limitations, as specified in a EASA AD. 

The FAA is issuing this AD to address 

reduced structural integrity of the 

airplane. See the MCAI for additional 

background information. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The FAA has considered 

the comments received. 

Support for the NPRM 

Ian Reineck indicated support for the 

NPRM. 

Request To Include Actions in the Cost 

Estimate 

Ian Reineck requested that the cost 

estimate be revised to include structural 

upkeep per flight hours, rather than 

solely maintenance work hours. The 

commenter stated this is what 

determines the core functions inside 

aviation maintenance schedules. The 

commenter also stated this would be 

inclusive, regardless of operator, but 

still reflect the cost of an average 

operator’s inspection through the 

quantity of accumulated flight time on 

the airplane. The commenter concluded 

that, if flight time is not presented in the 

inspection cost, it presents another 

problem: These aircraft may change 

ownership or operator-ship as they age. 

The FAA infers that the commenter is 

requesting that the FAA include the 

costs in this AD for complying with the 

actions (e.g., inspections) that are 

specified in the airworthiness 

limitations document referenced in 

EASA AD 2020–0115. The FAA 

disagrees because those actions are not 

directly required by this AD. 

Additionally, the FAA does not 

distribute the costs over time because 

the cost estimates have been