Airworthiness directives › 2023-07-07
AD 2023-07-07 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
This AD applies to MHI RJ Aviation ULC airplanes, certificated in any category, and identified in paragraphs (c)(1) through (4) of this AD. (1) Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7002 through 7990 inclusive, and 8000 through 8113 inclusive. (2) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) and CL-600-2C11 (Regional Jet Series 550) airplanes, serial numbers 10002 through 10347 inclusive. (3) Model CL-600-2D15 (Regional Jet Series 705) and Model CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 15001 through 15494 inclusive. (4) Model CL-600-2E25 (Regional Jet Series 1000), serial numbers 19001 through 19064 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For the purposes of this AD, the definitions specified in paragraphs (g)(1) through (4) of this AD apply. (1) Group 1 airplanes: The airplanes identified in paragraph (c)(1) of this AD. (2) Group 2 airplanes: The airplanes identified in paragraphs (c)(2) through (4) of this AD. (3) Affected part: A sensing element marked with a date code before A2105 and having a part number as defined in Section 1, Paragraph G(1), of MHI RJ Service Bulletin 601R-36-021, Revision D, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, for Group 1 airplanes; and in Appendix B, dated October 21, 2021, of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, and Appendix C, dated March 14, 2022, for Group 2 airplanes; unless the sensing element has been tested and found to be serviceable in accordance with paragraphs (g)(3)(i) and (ii) or paragraph (h) of this AD. (i) Has been tested as specified in Section 3 of the Accomplishment Instructions of Kidde Aerospace and Defense Service Bulletin CFD-26-5 and found to be serviceable; and (ii) Has been marked on one face of its connector hex nut and is packaged as specified in Section 3.C. of the Accomplishment Instructions—Identification Procedure of the Kidde Aerospace and Defense Service Bulletin CFD-26-5. (4) Serviceable part: A sensing element that is not an affected part.
Unsafe condition
This AD was prompted by reports that sensing elements of the bleed air leak detection system were manufactured with insufficient salt fill. The FAA is issuing this AD to address insufficient salt fill, which can result in an inability to detect hot bleed air leaks, which can cause damage to surrounding structures and systems that can prevent continued safe flight and landing.
Affected ADs
None.
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