2025-07-11: Hydraulic Power

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: 2025-07-11 Bombardier, Inc.: Amendment 39-23013; Docket No. FAA-2024-2720; Project Identifier MCAI-2024-00129-T. (a) Effective Date This airworthiness directive (AD) is effective July 2, 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 (S/Ns) 60001 through 60076 inclusive, 60083, 60087, and 60089. (d) Subject Air Transport Association (ATA) of America Code 29, Hydraulic Power. (e) Unsafe Condition This AD was prompted by reports of engine-driven pump hydraulic pressure hoses for hydraulic systems number 1 and 2 chafing against the pylon in the aft equipment bay. The FAA is issuing this AD to address the chafing of the hydraulic systems engine-driven pump hydraulic pressure hoses for the hydraulic system against the pylon, which may lead to hydraulic system leaks and failures and result in the loss of the affected hydraulic system. Loss of both hydraulic systems number 1 and 2 would substantially reduce the airplane's functional capabilities. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Inspection of Engine-Driven Pump Hydraulic Hoses Within 500 flight hours or 18 months after the effective date of this AD, whichever occurs first, do a borescope inspection of the routing of hydraulic systems number 1, left-hand side, and number 2, right-hand side, engine-driven pump pressure hoses over the length of the hoses for any damage and for minimum clearance between the engine-driven pump hydraulic pressure hose and case drain, suction pressure hose, and surrounding pylon structure, in accordance with section 2.B. of the Accomplishment Instructions of the applicable service information identified in paragraph (g)(1) through (3) of this AD. (1) For airplanes identified in Bombardier Service Bulletin 700-29-5502, dated November 29, 2023: Bombardier Service Bulletin 700-29-5502, dated November 29, 2023. Where paragraph 1.A. of Bombardier Service Bulletin 700-29-5502, dated November 29, 2023, identifies "Model BD-700-1A10 aircraft," this AD requires replacing that text with "Model BD-700-1A11 aircraft." (2) For airplanes identified in Bombardier Service Bulletin 700-29-6011, dated November 29, 2023: Bombardier Service Bulletin 700-29-6011, dated November 29, 2023. (3) For airplanes identified in Bombardier Service Bulletin 700-29-6502, dated November 29, 2023: Bombardier Service Bulletin 700-29-6502, dated November 29, 2023. (h) Corrective Actions (1) If clearance is found to be less than 0.500 inch (12.70 mm) during the inspection required by paragraph (g) of this AD: Before further flight, adjust the applicable hose(s) to obtain minimum clearance between the engine-driven pump hydraulic pressure hose and case drain, suction pressure hose, and surrounding pylon structure, in accordance with section 2.C. of the Accomplishment Instructions of the applicable service information identified in paragraphs (g)(1) through (3) of this AD. (2) If any damage (including fouling or chafing) is found during the inspection required by paragraph (g) of this AD: Before further flight, replace all damaged pressure hoses, in accordance with section 2.D. of the Accomplishment Instructions of the applicable service information identified in paragraphs (g)(1) through (3) of this AD. (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, send it to the attention of the person identified in paragraph (j) of this AD and email 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 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 Joseph Catanzaro, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7300; email: [email protected]. (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) Bombardier Service Bulletin 700-29-5502, dated November 29, 2023. (ii) Bombardier Service Bulletin 700-29-6011, dated November 29, 2023. (iii) Bombardier Service Bulletin 700-29-6502, dated November 29, 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 [email protected]; 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 [email protected]. Issued on April 3, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2025-09504 Filed 5-27-25; 8:45 am]BILLING CODE 4910-13-P