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 Department of Transportation Federal Aviation Administration 14 CFR Part 39
[Docket No. FAA-2024-2015; Project Identifier MCAI-2023-00769-T; Amendment 39-22887; AD 2024-23-08]
RIN 2120-AA64
 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-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by reports of missing or damaged inboard flap seal plate assemblies. This AD requires repetitive inspections for cracks of the attaching angles of the inboard flap seal plates and replacement. The FAA is issuing this AD to address the unsafe condition on these products.
 DATES: This AD is effective January 6, 2025. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of January 6, 2025.
 ADDRESSES:  *AD Docket:*
                         You may examine the AD docket at 
                        *regulations.gov*
                         under Docket No. FAA-2024-2015; 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 Côte-Vertu Road West, Dorval, Québec 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-2024-2015.
 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-700-1A10 and BD-700-1A11 airplanes. The NPRM published in the 
                    ( print page 95096)
                    **Federal Register**
                     on August 9, 2024 (89 FR 65264). The NPRM was prompted by AD CF-2023-42, dated June 19, 2023, issued by Transport Canada, which is the aviation authority for Canada (referred to after this as the MCAI). The MCAI states that there have been multiple reports in service of missing or damaged inboard flap seal plates. An investigation revealed a premature fatigue failure mode of the inboard flap seal plates. Left uncorrected, an inboard flap seal plate may partially or totally detach. Under certain flight conditions, a missing inboard flap seal plate could lead to excessive buffeting and vibration, and consequent damage to the airplane. In the NPRM, the FAA proposed to require repetitive inspections for cracks of the attaching angles of the inboard flap seal plates and replacement. 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-2024-2015. 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 Bombardier Service Bulletins 700-27-5509 and 700-27-6509, both Revision 01, both dated May 5, 2023. This material specifies procedures for repetitive detailed inspections for cracks of the attaching angles of the inboard flap seal plates and replacing the inboard flap seal plates if any crack is detected. This material also specifies procedures for replacing both existing inboard flap seal plates with structurally more robust redesigned components. The replacement actions include a detailed visual inspection for damage (including signs of failure, cracking, and deformation) of the flap inboard closing ribs and trailing edges, an eddy current or liquid penetrant inspection for cracks running out of the flap inboard closing rib holes common to the outboard stiffener and angle, and repair for cracks and other damage. The replacement would eliminate the need for the repetitive detailed inspections. These documents are distinct since they apply to different airplane models. 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 43 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. operators24 work-hours × $85 per hour = $2,040
$37,919
$39,959
$1,718,237
 The FAA has received no definitive data on which to base the cost estimates for the repairs specified in this AD. The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs, describes in more detail the scope of the Agency's authority. The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a 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
 2.The FAA amends § 39.13 by adding the following new airworthiness directive: **2024-23-08 Bombardier, Inc.:**
                             Amendment 39-22887; Docket No. FAA-2024-2015; Project Identifier MCAI-2023-00769-T. (a) Effective Date This airworthiness directive (AD) is effective January 6, 2025. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9861, 9872, 60001 through 60004 inclusive, 60006 through 60023 inclusive, 60025 through 60029 inclusive, 60031, 60033 through 60036 inclusive, 60038 through 60042 inclusive, 60044, 60046 through 60048 inclusive, 60050 through 60055 inclusive, 60058 through 60060 inclusive, 60062 through 60067 inclusive, 60069 through 60071 inclusive, 60073 through 60086 inclusive, and 60088 through 60101 inclusive. (d) Subject Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by reports of missing or damaged inboard flap seal plates. The FAA is issuing this AD to address the unsafe condition, which could result in the partial or total detachment of the flap seal plate. Under certain flight conditions, a missing inboard flap seal plate could lead to excessive buffeting and vibration, and consequent damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Detailed Inspection At the applicable time specified in figure 1 to paragraph (g) of this AD, perform a detailed inspection for cracks of the attaching angles of the inboard flap seal plates, in accordance with Section 2.B. (Part A) of the Accomplishment Instructions of Bombardier Service Bulletin 700-27-5509 or 700-27-6509, both Revision 01, both dated May 5, 2023, as applicable, except do corrective actions as specified in paragraph (h) of this AD. Figure 1 to Paragraph (
                                g
                                )—Compliance Requirements
Total flight hours as of the effective date of this AD
Compliance time after the effective date of this ADLess than or equal to 750
Within 250 flight hours.More than 750
Within 100 flight hours.
 (h) Corrective Actions for Inboard Flap Seal Plates (1) If no crack is found during any inspection required by paragraph (g) of this AD, repeat the inspection thereafter at intervals not to exceed 250 flight hours, except as specified in paragraph (i) of this AD. (2) If any crack is found during any inspection required by paragraph (g) of this AD, do the actions specified in paragraph (i) of this AD before further flight. (i) Replacement of Inboard Flap Seal Plates Unless already done as specified in paragraph (h)(2) of this AD: Within 12 months after the effective date of this AD, do the actions specified in paragraphs (i)(1) through (3) of this AD, in accordance with Section 2.C. (Part B) of the Accomplishment Instructions of Bombardier Service Bulletin 700-27-5509 or 700-27-6509, both Revision 01, both dated May 5, 2023, as applicable. (1) Replace the inboard flap seal plates with redesigned plates. (2) Do a detailed visual inspection for damage of the flap inboard closing ribs and trailing edges. (3) Do an eddy current or liquid penetrant inspection for cracks running out of the flap inboard closing rib holes common to the outboard stiffener and angle. (j) Repair for Flap Inboard Closing Ribs and Trailing Edges If any crack or other damage is found during any inspection required by paragraph (i)(2) or (3) of this AD, repair before further flight 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 the method is approved by the DAO, the approval must include the DAO-authorized signature. (k) Terminating Action for Repetitive Inspections Accomplishment of the actions required by paragraph (i) of this AD terminates the requirements of paragraph (h)(1) of this AD. (l) Credit for Previous Actions This paragraph provides credit for actions required by this AD, if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 700-27-5509 or 700-27-6509, both dated October 4, 2022. (m) No Reporting Requirement Although Bombardier Service Bulletins 700-27-5509 and 700-27-6509, both Revision 01, both dated May 5, 2023, specify to submit certain information to the manufacturer, this AD does not include that requirement. (n) 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 (o)(1) 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 Bombardier, Inc.'s Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (o) Additional Information (1) 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.* (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (p)(3) of this AD. (p) 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) Bombardier Service Bulletin 700-27-5509, Revision 01, dated May 5, 2023. (ii) Bombardier Service Bulletin 700-27-6509, Revision 01, dated May 5, 2023. (3) For Bombardier material identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 Côte-Vertu Road West, Dorval, Québec 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 
                            ( print page 95098)
                            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 November 12, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service.


[FR Doc. 2024-28125 Filed 11-29-24; 8:45 am] BILLING CODE 4910-13-P