Airworthiness directives › 2025-07-11
AD 2025-07-11 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-700-1A10, BD-700-1A11. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
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.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1