AD 2024-16-18

78231 Federal Register / Vol. 89, No. 186 / Wednesday, September 25, 2024 / Rules and Regulations (d) Subject Air Transport Association (ATA) of America Code 56, Windows. (e) Unsafe Condition This AD was prompted by reports of cracks, delamination, and failure of the flight deck side windows during certification fatigue tests. The FAA is issuing this AD to address such cracks and delamination, and any other damage of the flight deck side windows. The unsafe condition, if not addressed, could result in flight deck side windows to fail and lead to an in-flight depressurization event. (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, ANAC AD 2020–04–01R02. (h) Exceptions to ANAC AD 2020–04–01R02 (1) Where ANAC AD 2020–04–01R02 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph (b)(1) of ANAC AD 2020–04–01R02 refers to April 17, 2020 (the effective date of the original issue of ANAC AD 2020–04–01), this AD requires using January 21, 2021 (the effective date of AD 2020–25–07). (3) Where paragraph (b)(1)(iii) of ANAC AD 2020–04–01R02 specifies ‘‘In case of no crack, delamination, or any other damage, no action is required at this time,’’ this AD requires replacing that text with ‘‘in the case of no findings specified in paragraphs (b)(1)(i) and (ii) of ANAC AD 2020–04– 01R02, no further action is required by this AD until the next inspection interval.’’ (4) Where paragraph (b)(2) of ANAC AD 2020–04–01R02 refers to the compliance time of the repetitive inspections, ‘‘at each 750 Flight Hours (FH),’’ this AD requires replacing that text with ‘‘at intervals not to exceed 750 flight hours.’’ (5) Where paragraph (c) of ANAC AD 2020–04–01R02 refers to the compliance time for the replacement of the flight deck side windows as, ‘‘before the airplane logs 3,400 Flight Cycles Since New (FCSN),’’ this AD requires replacing that text with ‘‘before the airplane logs 3,400 FCSN, or within 50 flight cycles after the effective date of this AD, whichever occurs later.’’ (6) Replacement of the flight deck side windows as specified in paragraph (c) of ANAC AD 2020–04–01R02 terminates the repetitive inspections for the flight deck side windows specified in paragraph (b)(2) of ANAC AD 2020–04–01R02. (7) This AD does not adopt paragraph (e) of ANAC AD 2020–04–01R02. (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. Information may be emailed to: 9-AVS-AIR-730-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 ANAC; or ANAC’s authorized Designee. If approved by the ANAC Designee, the approval must include the Designee’s authorized signature. (j) Additional Information For more information about this AD, contact Hassan Ibrahim, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 206– 231–3653; email Hassan.M.Ibrahim@faa.gov. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference 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) Age ˆncia Nacional de Aviac ¸a ˜o Civil (ANAC) AD 2020–04–01R02, effective November 2, 2023. (ii) [Reserved] (3) For ANAC material identified in this AD, contact ANAC, Aeronautical Products Certification Branch (GGCP), Rua Dr. Orlando Feirabend Filho, 230-Centro Empresarial Aquarius-Torre B-Andares 14 a 18, Parque Residencial Aquarius, CEP 12.246–190–Sa ˜o Jose ´ dos Campos-SP, Brazil; telephone 55 (12) 3203–6600; email pac@anac.gov.br; website anac.gov.br/en/. You may find this ANAC AD on the ANAC website at sistemas.anac.gov.br/certificacao/DA/ DAE.asp. (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-locationsoremailfr.inspection@nara.gov. Issued on September 19, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–21853 Filed 9–24–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–1479; Project Identifier MCAI–2023–00657–T; Amendment 39–22824; AD 2024–16–18] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc., Airplanes AGENCY : Federal Aviation Administration (FAA), DOT. ACTION : Final rule. SUMMARY : The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD–100–1A10 airplanes. This AD was prompted by a determination that a revised restrictive airworthiness limitation is necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate a revised restrictive airworthiness limitation for the aft engine mount attachment bolts. The FAA is issuing this AD to address the unsafe condition on these products. DATES : This AD is effective October 30, 2024. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of October 30, 2024. ADDRESSES : AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–1479; 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 Bombardier material identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 Co ˆ te-Vertu Road West, Dorval, Que ´bec H4S 1Y9, Canada; telephone 514–855– 2999; email ac.yul@ aero.bombardier.com; website bombardier.com. • 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–2024–1479. VerDate Sep<11>2014 16:15 Sep 24, 2024 Jkt 262001 PO 00000 Frm 00031 Fmt 4700 Sfmt 4700 E:\FR\FM\25SER1.SGM 25SER1 ddrumheller on DSK120RN23PROD with RULES1

78232 Federal Register / Vol. 89, No. 186 / Wednesday, September 25, 2024 / Rules and Regulations 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 certain Bombardier, Inc., Model BD–100–1A10 airplanes. The NPRM published in the Federal Register on June 5, 2024 (89 FR 48139). The NPRM was prompted by AD CF–2023–29, dated May 5, 2023, issued by Transport Canada, which is the aviation authority for Canada (referred to after this as the MCAI). The MCAI states that the time limits/maintenance check (TLMC) airworthiness limitation (AWL) Task 54–51–00–111*, ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250– 07, Non-Serialized,’’ was not performed on some Challenger 300 in-service airplanes due to a misleading part number (P/N) referenced in the TLMC manual. The task requires the discard and replacement of the aft engine mount attachment bolt, P/N MS21250–07, while the P/N shown in the TLMC manual is P/N MS21250–7 in lieu of P/ N MS21250–07. Bombardier revised the TLMC AWL task and the relevant sections in the aircraft maintenance manual and the aircraft illustrated parts catalog with P/N MS21250–07 to ensure timely discard and replacement of the aft engine mount attachment bolts. In the NPRM, the FAA proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate a revised restrictive airworthiness limitation for the aft engine mount attachment bolts. The FAA is issuing this AD to address potential failures of the aft engine mount attachment bolt, P/N MS21250– 07. The unsafe condition, if not addressed, could lead to the detachment of the engine from the airplane, which could contribute to a catastrophic failure. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2024–1479. 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. Material Incorporated by Reference Under 1 CFR Part 51 The FAA reviewed the following documents. This material specifies a revised airworthiness limitation for the replacement of the aft engine mount attachment bolts, P/N MS21250–07. These documents are distinct since they apply to different airplane configurations. The asterisk (or ‘‘one star’’) with the last three digits of the task numbers indicates that the task is an airworthiness limitation task. • Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250–07, Non-Serialized,’’ Section 5–10–10 ‘‘Life Limits (Structures),’’ Part 2 ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 300 Time Limits/Maintenance Check, Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023. • Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250–07, Non-Serialized,’’ Section 5–10–10 ‘‘Life Limits (Structures),’’ Part 2 ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 350 Time Limits/Maintenance Check, Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023. 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 731 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: The FAA has determined that revising the 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 × $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: VerDate Sep<11>2014 16:15 Sep 24, 2024 Jkt 262001 PO 00000 Frm 00032 Fmt 4700 Sfmt 4700 E:\FR\FM\25SER1.SGM 25SER1 ddrumheller on DSK120RN23PROD with RULES1

78233 Federal Register / Vol. 89, No. 186 / Wednesday, September 25, 2024 / Rules and Regulations 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: 2024–16–18 Bombardier, Inc.: Amendment 39–22824; Docket No. FAA–2024–1479; Project Identifier MCAI–2023–00657–T. (a) Effective Date This airworthiness directive (AD) is effective October 30, 2024. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc., Model BD–100–1A10 airplanes, certificated in any category, having serial numbers (S/Ns) 20002 through 20912 inclusive. (d) Subject Air Transport Association (ATA) of America Code America Code 54, Nacelles/ Pylons. (e) Unsafe Condition This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. The FAA is issuing this AD to address potential failures of the aft engine mount attachment bolt, part number MS21250–07. The unsafe condition, if not addressed, could lead to the detachment of the engine from the airplane, which could contribute to a catastrophic failure. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Maintenance or Inspection Program Revision Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in paragraphs (g)(1) and (2) of this AD, as applicable. The initial compliance time for doing the tasks is at the time specified in the applicable time limit/maintenance check (TLMC) document specified in paragraphs (g)(1) and (2) of this AD, or within 60 days after the effective date of this AD, whichever occurs later. (1) For airplane S/Ns 20002 through 20500 inclusive: Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250–07, Non-Serialized,’’ Section 5– 10–10 ‘‘Life Limits (Structures),’’ Part 2, ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 300 Time Limits/ Maintenance Check, Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023. (2) For airplane S/Ns 20501 through 20912 inclusive: Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250–07, Non-Serialized,’’ Section 5– 10–10 ‘‘Life Limits (Structures),’’ Part 2 ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 350 Time Limits/ Maintenance Check, Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023. Note 1 to paragraph (g): The asterisk (or ‘‘one star’’) with the last three digits of the task numbers listed in paragraphs (g)(1) and (2) of this AD indicates that the task is an airworthiness limitation task. (h) No Alternative Actions or 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) or intervals may be used unless the actions or intervals, are approved as an alternative method of compliance in accordance with the procedures specified in paragraph (i)(1) of this AD. (i) Other FAA 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. Information may be emailed to: 9-AVS-NYACO-COS@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 Bombardier, Inc.’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 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) Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250–07, Non-Serialized,’’ Section 5–10–10 ‘‘Life Limits (Structures),’’ Part 2 ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 300 Time Limits/Maintenance Check, Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023. Note 2 to paragraph (k)(2)(i): The asterisk (or ‘‘one star’’) with the last three digits of the task numbers listed in paragraphs (k)(2)(i) and (ii) of this AD indicates that the task is an airworthiness limitation task. (ii) Task 54–51–00–111* ‘‘Discard of the Aft Engine Mount Bolts, Part No. MS21250– 07, Non-Serialized,’’ Section 5–10–10 ‘‘Life Limits (Structures),’’ of Part 2 ‘‘Airworthiness Limitations,’’ of the Bombardier Challenger 350 Time Limits/Maintenance Check, Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023. (3) For Bombardier material identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 Co ˆ te- Vertu Road West, Dorval, Que ´bec H4S 1Y9, Canada; telephone 514–855–2999; email ac.yul@aero.bombardier.com; website bombardier.com. (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 August 7, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–21807 Filed 9–24–24; 8:45 am] BILLING CODE 4910–13–P SUSQUEHANNA RIVER BASIN COMMISSION 18 CFR Part 801 General Policies AGENCY : Susquehanna River Basin Commission. ACTION : Final rule. SUMMARY : This document contains rules that amend the regulations of the Susquehanna River Basin Commission (Commission) to provide rules for agency procurement and bid protest procedures and for updating the general policies of the Commission to include climate change and environmental justice, revising the procedures regarding the adoption of the comprehensive plan and adding language to memorialize the Commission’s Dry Cooling Resolution. DATES : This rule is effective September 25, 2024. ADDRESSES : Susquehanna River Basin Commission, 4423 N Front Street, Harrisburg, PA 17110–1788. FOR FURTHER INFORMATION CONTACT : Jason E. Oyler, Esq., General Counsel, VerDate Sep<11>2014 16:15 Sep 24, 2024 Jkt 262001 PO 00000 Frm 00033 Fmt 4700 Sfmt 4700 E:\FR\FM\25SER1.SGM 25SER1 ddrumheller on DSK120RN23PROD with RULES1