Airworthiness Directive · Amendment 39-21690 · Aircraft fuel system
Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
This AD applies to Airbus Canada Limited Partnership (type certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada Civil Aviation (TCCA) AD CF-2021-09, dated March 11, 2021 (TCCA AD CF-2021-09).
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Model BD-500-1A10 and BD-500-1A11 airplanes. This AD was prompted by the potential for the flexible hose assembly of the fuel motive flow (MF), installed between the pylon and wing, to be installed twisted in the shroud, which can restrict the flow of fuel for the MF and cause fuel imbalance and damage to the shroud assembly. This AD requires inspecting for damage of the left and right MF fuel line assemblies (including the flexible-hose and shroud assemblies), and replacing damaged parts, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, TCCA AD CF-2021-09.
(1) Where TCCA AD CF-2021-09 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where TCCA AD CF-2021-09 specifies replacing MF fuel line assemblies, this AD requires that replacement before further flight after any damage (including any permanent deformity) is detected.
Although the service information referenced in TCCA AD CF-2021-09 specifies to return certain parts to the manufacturer, this AD does not include that requirement.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
