9212 Federal Register / Vol. 90, No. 26 / Monday, February 10, 2025 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2012; Project 

Identifier MCAI–2023–01208–T; Amendment 

39–22936; AD 2025–02–03] 

RIN 2120–AA64 

Airworthiness Directives; MHI RJ 

Aviation ULC (Type Certificate 

Previously Held by Bombardier, Inc.) 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all MHI 

RJ Aviation ULC Model CL–600–2B19 

(Regional Jet Series 100 & 440) 

airplanes. This AD was prompted by the 

discovery of ten ultrasonic inspections 

associated with airworthiness 

limitations (AWL) tasks and structural 

deviation inspection requirements 

(SDIR) tasks potentially not detecting 

cracks. This AD requires repetitive 

ultrasonic inspections of certain 

structural areas for cracking, and 

prohibits use of the previous revisions 

of certain procedures and mandates the 

use of the revised procedures when 

performing the inspections required by 

the associated AWL and SDIR tasks, as 

specified in a Transport Canada AD, 

which is incorporated by reference 

(IBR). This AD also requires repair of 

cracking. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective March 17, 

2025. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 17, 2025. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–2012; 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 Transport Canada material 

identified in this AD, contact Transport 

Canada, Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, 

Canada; telephone 888–663–3639; email 

TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca. 

You may find this material on the 

Transport Canada website at 

tc.canada.ca/en/aviation. 

• You may view this 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 at regulations.gov 

under Docket No. FAA–2024–2012. 

FOR FURTHER INFORMATION CONTACT: 

Yaser Osman, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; telephone 516– 

228–7300; email: 9-avs-nyaco-cos@

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 all MHI RJ Aviation ULC Model 

CL–600–2B19 (Regional Jet Series 100 & 

440) airplanes. The NPRM published in 

the Federal Register on August 8, 2024 

(89 FR 64837). The NPRM was 

prompted by AD CF–2023–74, dated 

November 21, 2023 (Transport Canada 

AD CF–2023–74) (also referred to as the 

MCAI), issued by Transport Canada, 

which is the aviation authority for 

Canada. The MCAI states MHI RJ 

Aviation ULC discovered that ten 

ultrasound (i.e., ultrasonic) inspection 

procedures in Part 4 of the nondestructive testing manual (NDTM), 

which is associated with AWL tasks and 

SDIR tasks, could potentially not detect 

cracks. The MCAI stated this is due to 

differences in sound attenuation 

between airplane structures assembled 

with faying surface sealant and the 

calibration reference standards used to 

calibrate the ultrasonic testing probes 

that were assembled without faying 

surface sealant. 

In the NPRM, the FAA proposed to 

require repetitive ultrasonic inspections 

of certain structural areas for cracking, 

and repair of cracking. The FAA also 

proposed to prohibit use of the previous 

revisions of certain procedures and 

mandate the use of the revised 

procedures when performing the 

inspections required by the associated 

AWL and SDIR tasks. The FAA is 

issuing this AD to address undetected 

cracks in certain structural areas. The 

unsafe condition, if not addressed, 

could result in structural failure of the 

airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2012. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

Air Wisconsin Airlines. The following 

presents the comment received on the 

NPRM and the FAA’s response to that 

comment. 

Request for Clarification of Upper or 

Lower Web Repairs 

Air Wisconsin Airlines requested a 

clarification for AWL NDTM part 4 

procedure 601R–51–53–61–345, 

temporary revision (TR) 51–028, per the 

MCAI. Air Wisconsin Airlines asked 

whether the proposed inspection would 

be required only for the repaired portion 

of the upper web, or for the lower web 

as well, if only a partial repair of the 

upper web was accomplished per repair 

engineering order (REO) 601R–53–61– 

345. 

The FAA provides the following 

clarification. This AD applies only to an 

existing repair location. Therefore, if 

only the upper web has a generic repair 

engineering order (GREO) per AWL 

601R–53–61–345, the inspection task 

51–53–61–345 is used to inspect the 

upper web. The lower web is inspected 

according to the intervals and 

inspection methods specified in the 

applicable maintenance repair manual 

(MRM), Part 2. The FAA has clarified 

this issue in paragraph (h)(5) of this AD. 

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, considered 

the comment 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 this product. Except for 

minor editorial changes, and any other 

changes described previously, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Material Incorporated by Reference 

Under 1 CFR Part 51 

Transport Canada AD CF–2023–74 

specifies procedures for repetitive 

ultrasonic inspections of certain 


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Federal Register / Vol. 90, No. 26 / Monday, February 10, 2025 / Rules and Regulations 9213 

structural areas for cracking. The 

structural areas include, but are not 

limited to, certain lateral beam web and 

lower cap flanges, engine support beam 

cap angles, engine support beams, webs, 

and doublers. Transport Canada AD CF– 

2023–74 also prohibits the use of the 

previous revisions of certain ultrasonic 

inspection procedures specified in Part 

4 of the NDTM and mandates the use of 

revised procedures when performing the 

inspections required by the associated 

AWL and SDIR tasks. 

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 the ADDRESSES section. 

Costs of Compliance 

The FAA estimates that this AD 

would affect 395 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 

5 work-hours × $85 per hour = $425 .......................................................................................... $0 $425 $167,875 

The FAA has received no definitive 

data on which to base the cost estimates 

for the 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 adding 

the following new airworthiness 

directive: 

2025–02–03 MHI RJ Aviation ULC (Type 

Certificate Previously Held by 

Bombardier, Inc.): Amendment 39– 

22936; Docket No. FAA–2024–2012; 

Project Identifier MCAI–2023–01208–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 17, 2025. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all MHI RJ Aviation 

ULC (Type Certificate previously held by 

Bombardier, Inc.) Model CL–600–2B19 

(Regional Jet Series 100 & 440) airplanes, 

certificated in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by the discovery of 

ten ultrasonic inspections associated with 

airworthiness limitations (AWL) tasks and 

structural deviation inspection requirements 

(SDIR) potentially not detecting cracks. The 

FAA is issuing this AD to address undetected 

cracks in certain structural areas. The unsafe 

condition, if not addressed, could result in 

structural failure 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, Transport Canada AD CF– 

2023–74, dated November 21, 2023 

(Transport Canada AD CF–2023–74). 

(h) Exceptions to Transport Canada AD CF– 

2023–74 

(1) Where Transport Canada AD CF–2023– 

74 refers to its effective date, this AD requires 

using the effective date of this AD. 

(2) Where paragraph A. of Transport 

Canada AD CF–2023–74 specifies to perform 

AWL tasks and SDIR tasks, for this AD, the 

initial compliance time for the tasks is at the 

time specified in paragraph A. of Transport 

Canada AD CF–2023–74 or within 30 days 

after the effective date of this AD, whichever 

occurs later. 

(3) Where paragraph B. of Transport 

Canada AD CF–2023–74 refers to phase-in 

compliance times in Table 1 of Transport 

Canada AD CF–2023–74, this AD requires 

using the applicable phase-in time identified 

in Table 1 of Transport Canada AD CF–2023– 

74, or within 30 days after the effective date 

of this AD, whichever occurs later. 

(4) If, during any inspection required by 

paragraph (g) of this AD, any cracking is 

found, repair before further flight using a 

method approved by the Manager, 

International Validation Branch, FAA; or 

Transport Canada; or MHI RJ Aviation ULC’s 

Transport Canada Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(5) If generic repair engineering order 

(GREO) 601R–53–61–345 has been performed 

only on the upper web or lower web, then 

the inspection specified in non-destructive 

testing manual (NDTM) part 4 procedure 51– 

53–61–345 (as specified in Transport Canada 

AD CF–2023–74) is applicable only to the 

repaired location (where a doubler is 

installed). 

(i) Additional AD Provisions 

The following provisions also apply to this 

AD: 


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9214 Federal Register / Vol. 90, No. 26 / Monday, February 10, 2025 / Rules and Regulations 

(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. Information may be 

emailed to: AMOC@faa.gov. 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 Transport Canada; or MHI 

RJ Aviation ULC’s Transport Canada Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(j) Additional Information 

For more information about this AD, 

contact Yaser Osman, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the material listed in this paragraph 

under 5 U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use this material as 

applicable to do the actions required by this 

AD, unless this AD specifies otherwise. 

(i) Transport Canada AD CF–2023–74, 

dated November 21, 2023. 

(ii) [Reserved] 

(3) For Transport Canada AD CF–2023–74, 

contact Transport Canada, Transport Canada 

National Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, Canada; 

telephone 888–663–3639; email 

TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca. You 

may find this Transport Canada AD on the 

Transport Canada website at tc.canada.ca/ 

en/aviation. 

(4) You may view this 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. 

(5) You may view this material at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit www.archives.gov/federal-register/cfr/ 

ibr-locations or email fr.inspection@nara.gov. 

Issued on January 16, 2025. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2025–02374 Filed 2–7–25; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2323; Project 

Identifier MCAI–2024–00171–T; Amendment 

39–22937; AD 2025–02–04] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2022–22– 

10, which applied to certain Airbus SAS 

Model A318, A319, A320, and A321 

series airplanes. AD 2022–22–10 

required revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

This AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. This AD continues to require 

certain actions in AD 2022–22–10 and 

requires revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, 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 March 17, 

2025. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 17, 2025. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of December 30, 2022 (87 FR 

72374, November 25, 2022). 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–2323; 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 EASA material identified in this 

AD, contact EASA, Konrad-AdenauerUfer 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 at 

ad.easa.europa.eu. 

• You may view this 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 at regulations.gov 

under Docket No. FAA–2024–2323. 

FOR FURTHER INFORMATION CONTACT: 

Timothy Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; phone: 

206–231–3367; email: 

timothy.p.dowling@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2022–22–10, 

Amendment 39–22225 (87 FR 72374, 

November 25, 2022) (AD 2022–22–10). 

AD 2022–22–10 applied to certain 

Airbus SAS Model A318, A319, A320, 

and A321 series airplanes. AD 2022–22– 

10 required revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

The FAA issued AD 2022–22–10 to 

address failure of certain life-limited 

parts, which could result in reduced 

structural integrity of the airplane. 

The NPRM published in the Federal 

Register on October 1, 2024 (89 FR 

79789). The NPRM was prompted by 

AD 2024–0066, dated March 8, 2024, 

issued by EASA, which is the Technical 

Agent for the Member States of the 

European Union (EASA AD 2024–0066) 

(also referred to as the MCAI). The 

MCAI states that new or more restrictive 

airworthiness limitations have been 

developed. 

In the NPRM, the FAA proposed to 

continue to require certain requirements 

of AD 2022–22–10. The FAA 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 EASA AD 

2024–0066. The FAA is issuing this AD 

to address failure of certain life-limited 

parts, which could result in reduced 

structural integrity of the airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2323. 


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