Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 50501-50503 [2024-13016]

Download as PDF 50501 Rules and Regulations Federal Register Vol. 89, No. 116 Friday, June 14, 2024 This section of the FEDERAL REGISTER contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510. The Code of Federal Regulations is sold by the Superintendent of Documents. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–0219; Project Identifier MCAI–2023–00764–T; Amendment 39–22755; AD 2024–10–09] RIN 2120–AA64 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL–600– 2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by a determination that a more restrictive airworthiness limitation is necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate a more restrictive airworthiness limitation, as specified in a Transport Canada 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 July 19, 2024. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of July 19, 2024. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–0219; 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 ddrumheller on DSK120RN23PROD with RULES1 SUMMARY: VerDate Sep<11>2014 16:11 Jun 13, 2024 Jkt 262001 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, 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; website tc.canada.ca/en/aviation. • 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. It is also available in the AD docket at regulations.gov under Docket No. FAA– 2024–0219. FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone 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 certain MHI RJ Aviation ULC Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes. The NPRM published in the Federal Register on February 2, 2024 (89 FR 7299). The NPRM was prompted by AD CF–2023– 41, dated June 15, 2023, issued by Transport Canada, which is the aviation authority for Canada (Transport Canada AD CF–2023–41) (also referred to as the MCAI). The MCAI states that a more restrictive airworthiness limitation has been developed due to reports of an unclear effectivity for airworthiness limitation (AWL) task number 53–41– 180 in the Maintenance Requirements Manual (MRM), Part 2. If the revised task, AWL number 53–41–180, is not performed at the required intervals, failures of the strap modification to the fuselage station (FS) 409 + 128 bulkhead could remain undetected and could result in the loss of the structural integrity of the airplane. In the NPRM, the FAA proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate a more restrictive airworthiness limitation, as PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 specified in Transport Canada AD CF– 2023–41. 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–2024–0219. Discussion of Final Airworthiness Directive Comments The FAA received comments from one commenter, Air Wisconsin Airlines. The following presents the comments received on the NPRM and the FAA’s response to each comment. Request for Change to Applicability Air Wisconsin Airlines noted that the proposed applicability in paragraph (c) of the proposed AD, which references the applicability in Transport Canada AD CF–2023–41, does not list the applicable reference serial numbers 7946 through 8113. The commenter requested that the proposed AD be revised to list the applicable serial numbers, if they are the same as those listed in Transport Canada AD CF– 2023–41. The FAA disagrees with correcting the applicability of this AD. Paragraph (c) of this AD states that the AD affects the airplanes identified in Transport Canada AD CF–2023–41, which has the applicability as affecting airplanes with serial numbers 7946 through 8113. No changes have been made to this AD regarding this issue. Request for Clarification of the Applicability of a Task Air Wisconsin Airlines requested clarification of whether paragraph (h)(2) of the proposed AD would require revising the maintenance or inspection program to incorporate a revised task for all airplanes or only certain airplanes. The FAA agrees to clarify. Revising the maintenance or inspection program to incorporate a revised AWL task affects all airplanes identified in the applicability in paragraph (c) of the AD. A task within an AWL might have an effectivity for specific airplanes. No changes have been made to this AD regarding this issue. Request for Clarification of the Fuselage Station of the Strap Modification Air Wisconsin Airlines requested that paragraph (e) of the proposed AD E:\FR\FM\14JNR1.SGM 14JNR1 50502 Federal Register / Vol. 89, No. 116 / Friday, June 14, 2024 / Rules and Regulations regarding the location of the strap modification be changed from ‘‘(FS) 409 and 128’’ to ‘‘(FS) 409 + 128’’. MHI RJ TR 2B–2283 lists the aircraft station as ‘‘fuselage (FS) 409 + 128 bulkhead.’’ In the NPRM, the location is listed as ‘‘(FS) 409 and 128 bulkhead,’’ which sounds like 2 different locations. The FAA agrees with the commenter. The FAA has confirmed with the manufacturer that the location of the strap modification is FS 409 + 128. The FAA has changed this final rule to reflect the proper location. 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 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 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. Related Service Information Under 1 CFR Part 51 Transport Canada AD CF–2023–41 specifies procedures for a more restrictive airworthiness limitation for AWL task number 53–41–180. 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. ddrumheller on DSK120RN23PROD with RULES1 Costs of Compliance The FAA estimates that this AD affects 78 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: The FAA has determined that revising the existing maintenance or inspection program takes an average of 90 workhours per operator, although the agency recognizes that this number may vary from operator to operator. Since operators incorporate maintenance or inspection program changes for their affected fleet(s), the FAA has determined that a per-operator estimate is more accurate than a per-airplane estimate. Therefore, the agency estimates the average total cost per operator to be $7,650 (90 work-hours × $85 per work-hour). VerDate Sep<11>2014 16:11 Jun 13, 2024 Jkt 262001 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. 2024–10–09 MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.): Amendment 39– 22755; Docket No. FAA–2024–0219; Project Identifier MCAI–2023–00764–T. 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. (e) Unsafe Condition List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. (1) Where Transport Canada AD CF–2023– 41 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph A. of Transport Canada AD CF–2023–41 specifies to ‘‘incorporate the revised task AWL number 53–41–180 in Appendix B of the MRM CSP A–053 Part 2,’’ this AD requires replacing that text with ‘‘revise the existing maintenance or inspection program, as applicable, by incorporating the revised task AWL number 53–41–180 specified in MHI RJ Temporary Revision 2B–2283, dated March 16, 2023.’’ (3) The initial compliance time for doing the task specified in paragraph A. of Transport Canada AD CF–2023–41 is at the applicable ‘‘threshold’’ as specified in the service information referenced in paragraph B. of Transport Canada AD CF–2023–41, or within 60 days after the effective date of this AD, whichever occurs later. (4) This AD does not adopt paragraph B. of Transport Canada AD CF–2023–41. 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: ■ PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 (a) Effective Date This airworthiness directive (AD) is effective July 19, 2024. (b) Affected ADs None. (c) Applicability This AD applies to 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, as identified in Transport Canada AD CF–2023–41, dated June 15, 2023 (Transport Canada AD CF– 2023–41). (d) Subject Air Transport Association (ATA) of America Code 05, Time Limits/Maintenance Checks. This AD was prompted by a determination that a more restrictive airworthiness limitation is necessary. The FAA is issuing this AD to address failure of the strap modification to the fuselage station (FS) 409 + 128 bulkhead. The unsafe condition, if not addressed, could result in the loss of the structural integrity 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– 2023–41. (h) Exception to Transport Canada AD CF– 2023–41 E:\FR\FM\14JNR1.SGM 14JNR1 Federal Register / Vol. 89, No. 116 / Friday, June 14, 2024 / Rules and Regulations (i) Provisions for Alternative Actions and Intervals After the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) and intervals are allowed unless they are approved as specified in the provisions of the ‘‘Corrective Actions’’ section of Transport Canada AD CF–2023–41. (j) 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 (k) of this AD or email to: 9-AVSNYACO-COS@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 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. ddrumheller on DSK120RN23PROD with RULES1 (k) Additional Information For more information about this AD, contact Mark Taylor, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone 516–228– 7300; email 9-avs-nyaco-cos@faa.gov. (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 this AD specifies otherwise. (i) Transport Canada AD CF–2023–41, dated June 15, 2023. (ii) [Reserved] (3) For Transport Canada AD CF–2023–41, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone 888–663–3639; email TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca. You may find this Transport Canada AD on the Transport Canada website tc.canada.ca/en/ aviation. (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 VerDate Sep<11>2014 16:11 Jun 13, 2024 Jkt 262001 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 May 15, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–13016 Filed 6–13–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–1471; Project Identifier MCAI–2024–00146–T; Amendment 39–22757; AD 2024–10–11] RIN 2120–AA64 Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD–500–1A10 and BD–500– 1A11 airplanes. This AD was prompted by a report indicating that the rigging pin in the bulkhead internal crank assembly of the overwing emergency exit door (OWEED) escape slide mechanism was not removed during production. This AD requires inspecting the OWEED escape slide mechanism to determine if a rigging pin is installed and, if installed, removing the rigging pin, as specified in Transport Canada 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 July 1, 2024. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of July 1, 2024. The FAA must receive comments on this AD by July 29, 2024. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. SUMMARY: PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 50503 • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–1471; 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 street address for Docket Operations is listed above. Material Incorporated by Reference: • For Transport Canada material, 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; website tc.canada.ca/en/aviation. • 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. It is also available at regulations.gov under Docket No. FAA–2024–1471. FOR FURTHER INFORMATION CONTACT: Gabriel Kim, 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: Comments Invited The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA–2024–1471; Project Identifier MCAI–2024–00146–T’’ at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this final rule because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to E:\FR\FM\14JNR1.SGM 14JNR1

Agencies

[Federal Register Volume 89, Number 116 (Friday, June 14, 2024)]
[Rules and Regulations]
[Pages 50501-50503]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-13016]



========================================================================
Rules and Regulations
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains regulatory documents 
having general applicability and legal effect, most of which are keyed 
to and codified in the Code of Federal Regulations, which is published 
under 50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by the Superintendent of Documents. 

========================================================================


Federal Register / Vol. 89, No. 116 / Friday, June 14, 2024 / Rules 
and Regulations

[[Page 50501]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0219; Project Identifier MCAI-2023-00764-T; 
Amendment 39-22755; AD 2024-10-09]
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 
certain MHI RJ Aviation ULC Model CL-600-2B19 (Regional Jet Series 100 
& 440) airplanes. This AD was prompted by a determination that a more 
restrictive airworthiness limitation is necessary. This AD requires 
revising the existing maintenance or inspection program, as applicable, 
to incorporate a more restrictive airworthiness limitation, as 
specified in a Transport Canada 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 July 19, 2024.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of July 19, 
2024.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-0219; 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, contact Transport Canada, Transport Canada 
National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario 
K1A 0N5, Canada; telephone 888-663-3639; email 
[email protected]; website 
tc.canada.ca/en/aviation.
     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. It is also available in the AD docket at 
regulations.gov under Docket No. FAA-2024-0219.

FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer, 
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone 516-228-
7300; email [email protected].

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 MHI RJ Aviation 
ULC Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The 
NPRM published in the Federal Register on February 2, 2024 (89 FR 
7299). The NPRM was prompted by AD CF-2023-41, dated June 15, 2023, 
issued by Transport Canada, which is the aviation authority for Canada 
(Transport Canada AD CF-2023-41) (also referred to as the MCAI). The 
MCAI states that a more restrictive airworthiness limitation has been 
developed due to reports of an unclear effectivity for airworthiness 
limitation (AWL) task number 53-41-180 in the Maintenance Requirements 
Manual (MRM), Part 2. If the revised task, AWL number 53-41-180, is not 
performed at the required intervals, failures of the strap modification 
to the fuselage station (FS) 409 + 128 bulkhead could remain undetected 
and could result in the loss of the structural integrity of the 
airplane.
    In the NPRM, the FAA proposed to require revising the existing 
maintenance or inspection program, as applicable, to incorporate a more 
restrictive airworthiness limitation, as specified in Transport Canada 
AD CF-2023-41. 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-2024-0219.

Discussion of Final Airworthiness Directive

Comments

    The FAA received comments from one commenter, Air Wisconsin 
Airlines. The following presents the comments received on the NPRM and 
the FAA's response to each comment.

Request for Change to Applicability

    Air Wisconsin Airlines noted that the proposed applicability in 
paragraph (c) of the proposed AD, which references the applicability in 
Transport Canada AD CF-2023-41, does not list the applicable reference 
serial numbers 7946 through 8113. The commenter requested that the 
proposed AD be revised to list the applicable serial numbers, if they 
are the same as those listed in Transport Canada AD CF-2023-41.
    The FAA disagrees with correcting the applicability of this AD. 
Paragraph (c) of this AD states that the AD affects the airplanes 
identified in Transport Canada AD CF-2023-41, which has the 
applicability as affecting airplanes with serial numbers 7946 through 
8113. No changes have been made to this AD regarding this issue.

Request for Clarification of the Applicability of a Task

    Air Wisconsin Airlines requested clarification of whether paragraph 
(h)(2) of the proposed AD would require revising the maintenance or 
inspection program to incorporate a revised task for all airplanes or 
only certain airplanes.
    The FAA agrees to clarify. Revising the maintenance or inspection 
program to incorporate a revised AWL task affects all airplanes 
identified in the applicability in paragraph (c) of the AD. A task 
within an AWL might have an effectivity for specific airplanes. No 
changes have been made to this AD regarding this issue.

Request for Clarification of the Fuselage Station of the Strap 
Modification

    Air Wisconsin Airlines requested that paragraph (e) of the proposed 
AD

[[Page 50502]]

regarding the location of the strap modification be changed from ``(FS) 
409 and 128'' to ``(FS) 409 + 128''. MHI RJ TR 2B-2283 lists the 
aircraft station as ``fuselage (FS) 409 + 128 bulkhead.'' In the NPRM, 
the location is listed as ``(FS) 409 and 128 bulkhead,'' which sounds 
like 2 different locations.
    The FAA agrees with the commenter. The FAA has confirmed with the 
manufacturer that the location of the strap modification is FS 409 + 
128. The FAA has changed this final rule to reflect the proper 
location.

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 
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 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.

Related Service Information Under 1 CFR Part 51

    Transport Canada AD CF-2023-41 specifies procedures for a more 
restrictive airworthiness limitation for AWL task number 53-41-180. 
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 affects 78 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:
    The FAA has determined that revising the existing maintenance or 
inspection program takes an average of 90 work-hours per operator, 
although the agency recognizes that this number may vary from operator 
to operator. Since operators incorporate maintenance or inspection 
program changes for their affected fleet(s), the FAA has determined 
that a per-operator estimate is more accurate than a per-airplane 
estimate. Therefore, the agency estimates the average total cost per 
operator to be $7,650 (90 work-hours x $85 per work-hour).

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

0
1. The authority citation for part 39 continues to read as follows:

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


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2024-10-09 MHI RJ Aviation ULC (Type Certificate Previously Held by 
Bombardier, Inc.): Amendment 39-22755; Docket No. FAA-2024-0219; 
Project Identifier MCAI-2023-00764-T.

(a) Effective Date

    This airworthiness directive (AD) is effective July 19, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to 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, as 
identified in Transport Canada AD CF-2023-41, dated June 15, 2023 
(Transport Canada AD CF-2023-41).

(d) Subject

    Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks.

(e) Unsafe Condition

    This AD was prompted by a determination that a more restrictive 
airworthiness limitation is necessary. The FAA is issuing this AD to 
address failure of the strap modification to the fuselage station 
(FS) 409 + 128 bulkhead. The unsafe condition, if not addressed, 
could result in the loss of the structural integrity 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-2023-41.

(h) Exception to Transport Canada AD CF-2023-41

    (1) Where Transport Canada AD CF-2023-41 refers to its effective 
date, this AD requires using the effective date of this AD.
    (2) Where paragraph A. of Transport Canada AD CF-2023-41 
specifies to ``incorporate the revised task AWL number 53-41-180 in 
Appendix B of the MRM CSP A-053 Part 2,'' this AD requires replacing 
that text with ``revise the existing maintenance or inspection 
program, as applicable, by incorporating the revised task AWL number 
53-41-180 specified in MHI RJ Temporary Revision 2B-2283, dated 
March 16, 2023.''
    (3) The initial compliance time for doing the task specified in 
paragraph A. of Transport Canada AD CF-2023-41 is at the applicable 
``threshold'' as specified in the service information referenced in 
paragraph B. of Transport Canada AD CF-2023-41, or within 60 days 
after the effective date of this AD, whichever occurs later.
    (4) This AD does not adopt paragraph B. of Transport Canada AD 
CF-2023-41.

[[Page 50503]]

(i) Provisions for Alternative Actions and Intervals

    After the existing maintenance or inspection program has been 
revised as required by paragraph (g) of this AD, no alternative 
actions (e.g., inspections) and intervals are allowed unless they 
are approved as specified in the provisions of the ``Corrective 
Actions'' section of Transport Canada AD CF-2023-41.

(j) 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 (k) of this AD or email to: [email protected]. 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 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.

(k) Additional Information

    For more information about this AD, contact Mark Taylor, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; phone 516-228-7300; email [email protected].

(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 this AD specifies otherwise.
    (i) Transport Canada AD CF-2023-41, dated June 15, 2023.
    (ii) [Reserved]
    (3) For Transport Canada AD CF-2023-41, contact Transport 
Canada, Transport Canada National Aircraft Certification, 159 
Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; phone 888-663-
3639; email [email protected]. You may find this Transport 
Canada AD on the Transport Canada website tc.canada.ca/en/aviation.
    (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 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 [email protected].

    Issued on May 15, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-13016 Filed 6-13-24; 8:45 am]
BILLING CODE 4910-13-P

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