Federal Register / Vol. 88, No. 190 / Tuesday, October 3, 2023 / Rules and Regulations 67935 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1222; Project 

Identifier AD–2023–00574–T; Amendment 

39–22547; AD 2023–18–06] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2021–02– 

15, which applied to certain The Boeing 

Company Model 747–100, 747–100B, 

747–100B SUD, 747–200B, 747–200C, 

747–200F, 747–300, 747–400, 747– 

400D, 747–400F, and 747SR series 

airplanes. AD 2021–02–15 required 

repetitive replacement of certain parts; 

an inspection to determine production 

configuration for certain parts; repetitive 

lubrication of certain parts and a 

repetitive inspection of certain parts for 

any exuding grease; repetitive 

inspections of certain parts for loose or 

missing attachment bolts, cracks or 

bushing migration, cracks or gouges, or 

broken, binding, or missing rollers; 

repetitive inspections of certain parts for 

cracks or corrosion; repetitive 

lubrication; and on-condition actions if 

necessary. This AD was prompted by 

the FAA’s determination that certain 

compliance times must be reduced in 

order to address the unsafe condition. 

This AD continues to require the actions 

specified in AD 2021–02–15 with 

certain reduced compliance times. 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–2023–1222; 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. 

Material Incorporated by Reference: 

• For service information identified 

in this final rule, 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. 

• 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. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1222. 

FOR FURTHER INFORMATION 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. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2021–02–15, 

Amendment 39–21398 (86 FR 10750, 

February 23, 2021) (AD 2021–02–15). 

AD 2021–02–15 applied to certain The 

Boeing Company Model 747–100, 747– 

100B, 747–100B SUD, 747–200B, 747– 

200C, 747–200F, 747–300, 747–400, 

747–400D, 747–400F, and 747SR series 

airplanes. The NPRM published in the 

Federal Register on July 10, 2023 (88 FR 

43479). The NPRM was prompted by the 

FAA’s determination that certain 

compliance times must be reduced in 

order to address the unsafe condition. In 

the NPRM, the FAA proposed to 

continue to require the actions specified 

in AD 2021–02–15 with certain reduced 

compliance times. The FAA is issuing 

this AD to address departures of the 

inboard foreflap assembly from the 

airplane, which could result in damage 

to the airplane and adversely affect the 

airplane’s continued safe flight and 

landing. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from Air 

Line Pilots Association, International 

(ALPA) and Boeing, who supported the 

NPRM without change. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, 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. 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 

The FAA reviewed Boeing Alert 

Requirements Bulletin 747–57A2367 

RB, Revision 1, dated March 20, 2023. 

This service information specifies 

procedures for repetitive replacement of 

certain parts; a general visual inspection 

to determine production configuration 

for certain parts; a repetitive lubrication 

of certain parts and a repetitive general 

visual inspection of certain parts for any 

exuding grease; repetitive detailed 

inspections of certain parts for loose or 

missing attachment bolts, cracks or 

bushing migration, cracks or gouges, or 

broken, binding, or missing rollers; 

repetitive detailed inspections of certain 

parts for cracks or corrosion; repetitive 

lubrication; and on-condition actions if 

necessary. On-condition actions include 

replacements and repair. 

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 134 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 


ddrumheller on DSK120RN23PROD with RULES1
67936 Federal Register / Vol. 88, No. 190 / Tuesday, October 3, 2023 / Rules and Regulations 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per product Cost on U.S. 

operators 

Repetitive replacement (retained actions from AD 2021–02–15).Up to 10 work-hours × $85 per hour 

= Up to $850 per replacement 

cycle.

$35,719 Up to $36,569 per replacement cycle.Up to $4,900,246 per 

replacement cycle. 

General visual inspection for parts 

production configuration (retained 

actions from AD 2021–02–15).

1 work-hour × $85 per hour = $85 .... 0 $85 ............................. $11,390. 

Repetitive detailed inspections (retained actions from AD 2021–02– 

15).

4 work-hours × $85 per hour = $340 

per inspection cycle.

0 $340 per inspection 

cycle.

$45,560 per inspection cycle. 

Repetitive inspection for lubrication 

and repetitive lubrication (retained 

actions from AD 2021–02–15).

1 work-hour × $85 per hour = $85 

per lubrication.

0 $85 per lubrication ..... $11,390 per lubrication. 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that would be required. The 

FAA has no way of determining the 

number of aircraft that might need these 

on-condition actions: 

ESTIMATED COSTS OF ON-CONDITION REPLACEMENTS

Labor cost Parts cost Cost per product 

Up to 8 work-hour × $85 per hour = $680 ............................................................. Up to $17,720 ........................................ Up to $18,400. 

The FAA has received no definitive 

data that would enable the FAA to 

provide cost estimates for the oncondition repairs specified in this AD. 

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: 

■ a. Removing Airworthiness Directive 

(AD) 2021–02–15, Amendment 39– 

21398 (86 FR 10750, February 23, 2021); 

and 

■ b. Adding the following new AD: 

2023–18–06 The Boeing Company: 

Amendment 39–22547; Docket No. 

FAA–2023–1222; Project Identifier AD– 

2023–00574–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective November 7, 2023. 

(b) Affected ADs 

This AD replaces AD 2021–02–15, 

Amendment 39–21398 (86 FR 10750, 

February 23, 2021) (AD 2021–02–15). 

(c) Applicability 

This AD applies to The Boeing Company 

Model 747–100, 747–100B, 747–100B SUD, 

747–200B, 747–200C, 747–200F, 747–300, 

747–400, 747–400D, 747–400F, and 747SR 

series airplanes, certificated in any category, 

as identified in Boeing Alert Requirements 

Bulletin 747–57A2367 RB, Revision 1, dated 

March 20, 2023. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 57, Wings. 

(e) Unsafe Condition 

This AD was prompted by reports of partial 

and full inboard foreflap departures from the 

airplane. The FAA is issuing this AD to 

address departures of the inboard foreflap 

assembly from the airplane, which could 

result in damage to the airplane and 

adversely affect the airplane’s continued safe 

flight and landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Actions, With Revised 

Compliance Times and Service Information 

This paragraph restates the requirements of 

paragraph (g) of AD 2021–02–15, with 

revised compliance times and service 

information. Except as specified by 

paragraph (h) of this AD: At the applicable 

times specified in the ‘‘Compliance’’ 


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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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