Airworthiness Directive · Amendment 39-22409 · Pneumatic
MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
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.
The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL-600-2B19 (Regional Jet Series 100 & 440), CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL- 600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports from the supplier that sensing elements of the bleed air leak detection system were manufactured with insufficient salt fill, which can result in an inability to detect hot bleed air leaks. This AD requires testing of all affected overheat detection sensing elements of the bleed air leak detection system, and replacement if necessary. This AD also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.
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.
Perform a test of the bleed air leak detection system sensing elements to determine if they are serviceable, in accordance with Section 2, Part A through Part F, of the Accomplishment Instructions 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 Section 2, Part A through Part M, of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022, for Group 2 airplanes; within the applicable compliance time indicated in figure 1 to paragraph (h) of this AD. This AD does not require filling out the serial number or date code of the sensing element in Appendix A, Revision B, dated March 14, 2022; of MHI RJ Service Bulletin 601R-36-021, Revision D, dated May 25, 2022; or MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022; as applicable, if the serial number or date code is not visible without additional disassembly and the part has not failed. However, the Sensing Element Name must be recorded on the Test Data Sheet, so it is clear exactly the sensing element that was tested.
(1) For Group 1 airplanes: If any sensing element is found not serviceable during the tests required by paragraph (h) of this AD, before further flight, replace the sensing element with a serviceable part in accordance with Section 2, Part A through Part F, as applicable, of the Accomplishment Instructions of MHI RJ Service Bulletin 601R-36-021, Revision D, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022.
(2) For Group 2 airplanes: If any sensing element is found not serviceable during the tests required by paragraph (h) of this AD, before further flight, unless deferred in accordance with paragraph (j) of this AD, replace the sensing element with a serviceable part in accordance with Section 2, Part A through Part M, as applicable, of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022.
The replacement of an affected part with a serviceable part for Group 2 airplanes, as required by paragraph (i)(2) of this AD, may be deferred up to a maximum of 10 days under the conditions specified in paragraphs (j)(1) or (2) of this AD.
(1) A single bleed air leak detection loop (loop A or loop B) sensing element for a given Part (Part A through Part M of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022) is found not serviceable, provided that the conditions specified in paragraphs (j)(1)(i) through (iv) of this AD have been satisfied.
(i) The remaining operative bleed air leak detection loop (loop A or loop B) sensing elements have been tested and found to be serviceable in accordance with paragraph (h) of this AD.
(ii) The applicable maintenance procedures of Appendix C, dated March 14, 2022, 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 B, dated October 21, 2021, to deactivate the defective sensing element are accomplished prior to operation of the airplane with the defective sensing element inoperative.
(iii) A placard has been installed on the BLEED AIR control panel in accordance with Section 2, Part A through Part M, as applicable, of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022; or in accordance with the operator's FAA-approved Minimum Equipment List (MEL) procedure.
(iv) All flightcrew have been advised that the airplane is dispatched with one out of two bleed air leak detection loops inoperative.
(2) Both bleed air leak detection loop A and loop B sensing elements for a given part (Part A through Part M of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022) are found not serviceable, provided that the conditions specified in paragraphs (j)(2)(i) through (iv) of this AD have been satisfied.
(i) The applicable maintenance procedures of Appendix C, dated March 14, 2022, 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 B, dated October 21, 2021, to deactivate the defective sensing elements are accomplished prior to operation of the airplane with the defective sensing elements inoperative.
(ii) The applicable instructions and limitations of the operator's existing FAA-approved Minimum Equipment List (MEL) item 36-21-06, sub-item 1, 2, or 3, as applicable, in accordance with Section 2, Part A through Part M, of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022, are accomplished prior to operation of the airplane with the defective sensing elements inoperative.
(iii) A placard has been installed on the BLEED AIR control panel in accordance with Section 2, Part A through Part M, as applicable, of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-36-025, Revision C, dated May 25, 2022, including Appendix A, Revision B, dated March 14, 2022, Appendix B, dated October 21, 2021, and Appendix C, dated March 14, 2022; or in accordance with the operator's FAA-approved MEL procedure.
(iv) All flightcrew have been advised that the airplane is dispatched with both bleed air leak detection loops inoperative.
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.
Aircraft
