Airworthiness directives › 2024-07-08
AD 2024-07-08 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
This AD applies to MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702); CL-600-2C11 (Regional Jet Series 550); CL-600-2D15 (Regional Jet Series 705); and CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, as identified in Transport Canada AD CF-2022-54R1, dated October 4, 2022 (Transport Canada AD CF-2022-54R1).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as required by paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada CF-2022-54R1.
Unsafe condition
This AD was prompted by a determination that the MHI RJ Non-Destructive Testing Manual (NDTM) Part 6, Procedure 53-61-121-250, associated with Airworthiness Limitations (ALI) Task 53-61-121, is not adequate to detect a potential crack of the tombstone fitting lug as the bushings remain in place during the special detailed inspection (SDI). The FAA is issuing this AD to address the undetected cracking of the tombstone fitting lug. If the crack is not detected, the tombstone fitting lug will eventually fail. The failure will cause a transfer of load to other engine attachment points, which will then be overloaded and compromised in their structural integrity. This can lead to a rapid failure mode, potentially resulting in the loss of the engine.
Affected ADs
None.
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