2025-19-05: Flight controls

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: a. Removing Airworthiness Directive (AD) 2019-16-09, Amendment 39-19712 (84 FR 46434, September 4, 2019); and b. Adding the following new AD: 2025-19-05 De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.): Amendment 39-23145; Docket No. FAA-2025-0482; Project Identifier MCAI-2024-00152-T. (a) Effective Date This airworthiness directive (AD) is effective October 31, 2025. (b) Affected ADs This AD replaces AD 2019-16-09, Amendment 39-19712 (84 FR 46434, September 4, 2019) (AD 2019-16-09). (c) Applicability This AD applies to De Havilland Aircraft of Canada Limited (type certificate previously held by Bombardier, Inc.) Model DHC-8-401 and -402 airplanes, certificated in any category, as identified in Transport Canada AD CF-2024-10, dated March 1, 2024 (Transport Canada AD CF-2024-10). (d) Subject Air Transport Association (ATA) of America Code 27, Flight controls. (e) Unsafe Condition This AD was prompted by reports of cracked elevator power control unit (PCU) fittings (brackets) on the horizontal stabilizer rear spar and cracking on the elevator front spar. The FAA is issuing this AD to address this condition, which, if not detected and corrected, may cause failure of an elevator PCU fitting (bracket) or fracture the front spar into two segments; either structural failure may cause a jam in one elevator or a loss of airplane pitch control if both elevators are affected. (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-2024-10. (h) Exceptions to Transport Canada AD CF-2024-10 (1) Where Transport Canada AD CF-2024-10 refers to the effective date of AD CF-2018-34 (December 31, 2018), this AD requires using October 9, 2019 (the effective date of AD 2019-16-09). (2) Where Transport Canada AD CF-2024-10 refers to hours air time, this AD requires using flight hours. (3) Where Transport Canada AD CF-2024-10 refers to "if cracks or damage", this AD requires replacing that text with "if any crack or damage". (4) Where Transport Canada AD CF-2024-10 specifies actions if certain conditions are found on "rear spar assembly P/N 85517044 and/or elevator assembly P/N 85527021", this AD requires replacing that text with "rear spar assembly P/N 85517044 or elevator assembly P/N 85527021". (5) Where Transport Canada AD CF-2024-10 specifies "after inspecting as required by AD CF-2018-34", this AD requires replacing that text with "after inspecting as specified in Bombardier Service Bulletin 84-55-09 or de Havilland Aircraft of Canada Limited Service Bulletin 84-55-09". (6) Where paragraph B. of Part I and paragraph A. of Part II of Transport Canada AD CF-2024-10 specify a compliance time to do a repeat inspection, this AD allows the inspection to be done within 90 days after the effective date of this AD. (i) No Reporting Requirement Although the material referenced in Transport Canada AD CF-2024-10 specifies to submit certain information to the manufacturer, this AD does not include that requirement. (j) Optional Terminating Action for Repetitive Inspections (1) For airplane serial numbers 4001 and 4003 through 4058 inclusive on which any inspection specified in Section 3.B. of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-09 or de Havilland Aircraft of Canada Limited Service Bulletin 84-55-09 has been done: Replacement of existing PCU fittings with redesigned PCU fittings in accordance with Part I, paragraph B., of Transport Canada AD CF-2025-19, dated March 24, 2025, terminates the requirements of paragraph (g) of this AD. (2) For airplane serial numbers 4059 through 4580 inclusive on which any inspection specified in Section 3.B. of the Accomplishment Instructions of Bombardier Service Bulletin 84-55-09 or de Havilland Aircraft of Canada Limited Service Bulletin 84-55-09 has been done: Replacement of existing PCU fittings with redesigned PCU fittings in accordance with Part II, paragraphs B. and C., of Transport Canada AD CF-2025-19, dated March 24, 2025, terminates the requirements of paragraph (g) of this AD. (k) Credit for Previous Actions This paragraph provides credit for the actions specified in paragraph A. of Part I of Transport Canada AD CF-2024-10, as required by paragraph (g) of this AD, if those actions were performed before the effective date of this AD using Bombardier Service Bulletin 84-55-09, dated June 7, 2018; or de Havilland Aircraft of Canada Limited Service Bulletin 84-55-09, Revision A, dated January 10, 2020. (l) 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, International Validation Branch, send it to the attention of the person identified in paragraph (m)(1) of this AD and email to: AMOC@faa.gov . (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 De Havilland Aircraft of Canada Limited's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (m) Additional Information (1) For more information about this AD, contact Yaser Osman, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7300; email: 9-avs-nyaco-cos@faa.gov . (2) For Bombardier or De Havilland Aircraft of Canada Limited material identified in this AD that is not incorporated by reference, contact De Havilland Aircraft of Canada Limited, Dash 8 Series Customer Response Centre, 5800 Explorer Drive, Mississauga, Ontario, L4W 5K9, Canada; telephone North America (toll-free): 855-310-1013, Direct: 647-277-5820; email thd@dehavilland.com; website dehavilland.com. (n) 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) Transport Canada AD CF-2024-10, dated March 1, 2024. (ii) Transport Canada AD CF-2025-19, dated March 24, 2025. (3) 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.AirworthinessDirectives-Consignesdenavigabilite.TC@tc.gc.ca . You may find this material 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 September 16, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2025-18757 Filed 9-25-25; 8:45 am]BILLING CODE 4910-13-P