Federal Register / Vol. 88, No. 190 / Tuesday, October 3, 2023 / Rules and Regulations 67937 

paragraph of Boeing Alert Requirements 

Bulletin 747–57A2367 RB, Revision 1, dated 

March 20, 2023, do all applicable actions 

identified in, and in accordance with, the 

Accomplishment Instructions of Boeing Alert 

Requirements Bulletin 747–57A2367 RB, 

Revision 1, dated March 20, 2023. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 747–57A2367, Revision 1, dated 

March 20, 2023, which is referred to in 

Boeing Alert Requirements Bulletin 747– 

57A2367 RB, Revision 1, dated March 20, 

2023. 

(h) Exceptions to Service Information 

Specifications 

(1) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Alert Requirements Bulletin 747– 

57A2367 RB, Revision 1, dated March 20, 

2023, use the phrase ‘‘the original issue date 

of Requirements Bulletin 747–57A2367 RB,’’ 

this AD requires using March 30, 2021 (the 

effective date of AD 2021–02–15). 

(2) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Alert Requirements Bulletin 747– 

57A2367 RB, Revision 1, dated March 20, 

2023, use the phrase ‘‘the Revision 1 date of 

Requirements Bulletin 747–57A2367 RB,’’ 

this AD requires using ‘‘the effective date of 

this AD.’’ 

(i) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraph (g) of this AD, 

if those actions were performed before the 

effective date of this AD using Boeing Alert 

Requirements Bulletin 747–57A2367 RB, 

dated November 15, 2019. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, AIR–520 Continued 

Operational Safety 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 responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of AIR–520 Continued 

Operational Safety Branch, send it to the 

attention of the person identified in 

paragraph (k)(1) of this AD. Information may 

be emailed to: 9-ANM-Seattle-ACO-AMOCRequests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, AIR–520 Continued Operational 

Safety Branch, FAA, to make those findings. 

To be approved, the repair method, 

modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(4) AMOCs approved for AD 2021–02–15 

are approved as AMOCs for the 

corresponding provisions of Boeing Alert 

Requirements Bulletin 747–57A2367 RB, 

Revision 1, dated March 20, 2023, that are 

required by paragraph (g) of this AD. 

(k) Related Information 

(1) For more information about this AD, 

contact Stefanie Roesli, Aviation Safety 

Engineer, FAA, 2200 South 216th St., Des 

Moines, WA 98198; phone: 206–231–3964; 

email: Stefanie.N.Roesli@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (l)(3) and (4) of this AD. 

(l) 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) Boeing Alert Requirements Bulletin 

747–57A2367 RB, Revision 1, dated March 

20, 2023. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; website 

myboeingfleet.com. 

(4) You may view this service information 

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. 

(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 fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on September 7, 2023. 

Caitlin Locke, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–21718 Filed 10–2–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1402; Project 

Identifier MCAI–2023–00324–T; Amendment 

39–22549; AD 2023–18–08] 

RIN 2120–AA64 

Airworthiness Directives; Dassault 

Aviation Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Dassault Aviation Model MYSTERE– 

FALCON 900, FALCON 900EX, 

FALCON 2000, and FALCON 2000EX 

airplanes. This AD was prompted by 

reports of the wing anti-icing (WAI) 

system leaking in the wing leading edge. 

This AD requires a one-time inspection 

of the WAI system, and corrective 

actions if necessary, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is incorporated by 

reference. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective November 7, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 7, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1402; 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 mandatory 

continuing airworthiness information 

(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. 

Material Incorporated by Reference: 

• For material incorporated by 

reference in this AD, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 

website easa.europa.eu. You may find 

this material on the EASA website 

ad.easa.europa.eu. 

• You may view this material at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th Street, Des Moines, WA. For 


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67938 Federal Register / Vol. 88, No. 190 / Tuesday, October 3, 2023 / Rules and Regulations 

information on the availability of this 

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

It is also available in the AD docket at 

regulations.gov under Docket No. FAA– 

2023–1402. 

FOR FURTHER INFORMATION CONTACT: Tom 

Rodriguez, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; telephone 206– 

231–3226; email tom.rodriguez@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 Dassault Aviation 

Model MYSTERE–FALCON 900, 

FALCON 900EX, FALCON 2000, and 

FALCON 2000EX airplanes. The NPRM 

published in the Federal Register on 

July 10, 2023 (88 FR 43477). The NPRM 

was prompted by AD 2023–0041, dated 

February 21, 2023, issued by EASA, 

which is the Technical Agent for the 

Member States of the European Union 

(EASA AD 2023–0041) (also referred to 

as the MCAI). The MCAI states the WAI 

system was reported leaking in the wing 

leading edge. The leaks were either from 

an incorrect installation of the Wiggins 

coupling on the WAI system, or 

detachment of the pressure switch line 

from the WAI pipe (only found on the 

Falcon 2000 and Falcon 2000EX 

airplanes). This condition, if not 

detected and corrected, could lead to a 

loss of performance of WAI protection 

system, possibly resulting in reduced 

control of the airplane. 

In the NPRM, the FAA proposed to 

require a one-time inspection of the 

WAI system, and corrective actions if 

necessary, as specified in EASA AD 

2023–0041. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1402. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the cost to the public. 

Conclusion 

This product has been approved by 

the aviation authority of another 

country and is approved for operation in 

the United States. Pursuant to the FAA’s 

bilateral agreement with this State of 

Design Authority, it has notified the 

FAA of the unsafe condition described 

in the MCAI 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 this 

product. Except for minor editorial 

changes, this AD is adopted as proposed 

in the NPRM. None of the changes will 

increase the economic burden on any 

operator. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2023–0041 specifies 

procedures for a one-time general visual 

inspection of the WAI system for 

discrepancies, including incorrect 

installation, deformation, leakage or 

signs of overheating, and lack of free 

rotation of the clamp around the two 

ferrules, and, depending on findings, 

corrective actions. Corrective actions 

include replacement or re-installation of 

the affected WAI Wiggins coupling with 

new seals and couplings. For the Falcon 

2000 and Falcon 2000EX airplanes, 

there is an additional one-time general 

visual inspection of the WAI pipes for 

traces of abnormal leakage, overheating, 

or degradation of the thermal lagging, 

and depending on findings, corrective 

actions. Corrective actions are for 

replacement of the affected WAI pipes. 

This material 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 820 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

7 work-hours × $85 per hour = $595 .......................................................................................... $0 $595 $487,900 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that would be required based on 

the results of any required actions. The 

FAA has no way of determining the 

number of aircraft that might need these 

on-condition actions: 

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Labor cost Parts cost Cost per product 

Up to 2 work-hours × $85 per hour = Up to $170 ...................................................................................... $517 Up to $687.

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some or all 

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 


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Federal Register / Vol. 88, No. 190 / Tuesday, October 3, 2023 / Rules and Regulations 67939 

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: 

2023–18–08 Dassault Aviation: 

Amendment 39–22549; Docket No. 

FAA–2023–1402; Project Identifier 

MCAI–2023–00324–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective November 7, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Dassault Aviation 

Model MYSTERE–FALCON 900, FALCON 

900EX, FALCON 2000, and FALCON 2000EX 

airplanes, certificated in any category, as 

identified in European Union Aviation Safety 

Agency (EASA) AD 2023–0041, dated 

February 21, 2023 (EASA AD 2023–0041). 

(d) Subject 

Air Transport Association (ATA) of 

America Code 30, Ice and Rain Protection. 

(e) Unsafe Condition 

This AD was prompted by reports of the 

wing anti-icing (WAI) system leaking in the 

wing leading edge. The FAA is issuing this 

AD to address leaks in the WAI system. The 

unsafe condition, if not addressed, could lead 

to a loss of performance of the WAI 

protection system, possibly resulting in 

reduced control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, EASA AD 2023–0041. 

(h) Exceptions to EASA AD 2023–0041 

(1) Where EASA AD 2023–0041 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) Where paragraph (2) of EASA AD 2023– 

0041 specifies actions if ‘‘any discrepancy [as 

defined in the applicable inspection SB] is 

found,’’ for this AD, discrepancies are 

defined as incorrect installation, 

deformation, leakage, signs of overheating, 

and lack of free rotation of the clamp around 

the two ferrules. 

(3) This AD does not adopt the ‘‘Remarks’’ 

section of EASA AD 2023–0041. 

(i) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(1) 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. 

In accordance with 14 CFR 39.19, send your 

request to your principal inspector or 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the International Validation 

Branch, mail it to the address identified in 

paragraph (j) of this AD or email to: 9-AVSAIR-730-AMOC@faa.gov. If mailing 

information, also submit information by 

email. Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, International Validation 

Branch, FAA; or EASA; or Dassault 

Aviation’s EASA Design Organization 

Approval (DOA). If approved by the DOA, 

the approval must include the DOAauthorized signature. 

(j) Additional Information 

For more information about this AD, 

contact Tom Rodriguez, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3226; email tom.rodriguez@faa.gov. 

(k) 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 this AD specifies otherwise. 

(i) European Union Aviation Safety Agency 

(EASA) AD 2023–0041, dated February 21, 

2023. 

(ii) [Reserved] 

(3) For EASA AD 2023–0041, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; website 

easa.europa.eu. You may find this EASA AD 

on the EASA website ad.easa.europa.eu. 

(4) You may view this material at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th Street, Des 

Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(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 

fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on September 8, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–21717 Filed 10–2–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–0940; Project 

Identifier AD–2022–01521–E; Amendment 

39–22552; AD 2023–19–02] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Division Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2018–21– 

11, which applied to all Pratt & Whitney 

Division (PW) Model PW4074D, 

PW4077D, PW4084D, PW4090, and 

PW4090–3 engines with a low-pressure 

compressor (LPC) fan hub, part number 

(P/N) 51B821 or P/N 52B521, installed. 

AD 2018–21–11 required performing 

repetitive eddy current inspections 

(ECIs) and fluorescent penetrant 

inspections (FPIs) for cracks in certain 

LPC fan hubs and removing LPC fan 

hubs from service that fail any 

inspection. Since the FAA issued AD 

2018–21–11, the FAA determined that 

affected LPC fan hub assemblies can 

meet the published certificated life limit 

without the need for the required 

repetitive FPI inspections in AD 2018– 

21–11, and the repetitive ECI 


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