2024-07-08: Fuselage

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2024-07-08 MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.): Amendment 39-22729; Docket No. FAA-2024-0031; Project Identifier MCAI-2022-01307-T. (a) Effective Date This airworthiness directive (AD) is effective June 5, 2024. (b) Affected ADs None. (c) Applicability This AD applies to MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702); CL-600-2C11 (Regional Jet Series 550); CL-600-2D15 (Regional Jet Series 705); and CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, as identified in Transport Canada AD CF-2022-54R1, dated October 4, 2022 (Transport Canada AD CF-2022-54R1). (d) Subject Air Transport Association (ATA) of America 53, Fuselage. (e) Unsafe Condition This AD was prompted by a determination that the MHI RJ Non-Destructive Testing Manual (NDTM) Part 6, Procedure 53-61-121-250, associated with Airworthiness Limitations (ALI) Task 53-61-121, is not adequate to detect a potential crack of the tombstone fitting lug as the bushings remain in place during the special detailed inspection (SDI). The FAA is issuing this AD to address the undetected cracking of the tombstone fitting lug. If the crack is not detected, the tombstone fitting lug will eventually fail. The failure will cause a transfer of load to other engine attachment points, which will then be overloaded and compromised in their structural integrity. This can lead to a rapid failure mode, potentially resulting in the loss of the engine. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as required by paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada CF-2022-54R1. (h) Exceptions To Transport Canada CF-2022-54R1 (1) Where Transport Canada AD CF-2022-54R1 refers to the effective date of AD CF-2022-54 (September 27, 2022), this AD requires using the effective date of this AD. (2) Where paragraph A. of Transport Canada AD CF-2022-54R1 specifies inspecting "For aeroplanes that, as of the effective date of AD CF-2022-54 (27 September 2022), have not been inspected as required by MRM CSP B-053 Part 2 ALI Task 53-61-121," this AD requires replacing that text with "For all airplanes." (3) This AD does not adopt paragraph B. of Transport Canada AD CF-2022-54R1. (4) Where paragraph A. of Transport Canada AD CF-2022-54R1 specifies inspecting "within the intervals in MRM CSP B-053 Part 2 for ALI Task 53-61-121," for this AD, the initial compliance time for the task is within the "threshold" specified in the service information identified in paragraph A. of Transport Canada AD CF-2022-54R1 or within 90 days after the effective date of this AD, whichever occurs later. (i) Crack Repair If any cracking is found during the actions required by paragraph (g) of this AD, repair the cracking 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 DOA-authorized signature. (j) No Reporting Requirement Although the service information referenced in Transport Canada AD CF-2022-54R1 specifies to submit certain information to the manufacturer, this AD does not include that requirement. (k) 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 (l) of this AD. Information may be emailed to: [email protected]. 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. (l) 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 [email protected]. (m) 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-2022-54R1, dated October 4, 2022. (ii) [Reserved] (3) For Transport Canada AD CF-2022-54R1, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-3639; email [email protected]. 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 [email protected] . Issued on April 2, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024-09340 Filed 4-30-24; 8:45 am]BILLING CODE 4910-13-P