Airworthiness directives › 2025-12-04
AD 2025-12-04 Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
Models named: BD-500-1A11. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Canada Limited Partnership (Type Certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada AD CF-2024-13, dated April 29, 2024 (Transport Canada AD CF-2024-13).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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-2024-13.
Unsafe condition
This AD was prompted by an investigation of an in-service leakage event that indicated the use potential of an uncalibrated torque wrench when tightening the union fittings at the pressure and return interfaces of all three rudder hydraulic power control units (PCUs). The FAA is issuing this AD to address union fittings that could come loose and leak when improperly torqued. The unsafe condition, if not addressed, could result in the potential loss of one or more hydraulic systems.
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