Airworthiness Directive · Amendment 39-22166 · Fuel
MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
This AD applies to the MHI RJ Aviation ULC airplanes, certificated in any category, 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 8112 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 CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 15001 through 15499 inclusive.
(4) Model CL-600-2E25 (Regional Jet Series 1000) airplanes, 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) airplanes, Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) airplanes, Model CL-600-2C11 (Regional Jet Series 550) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600- 2D24 (Regional Jet Series 900) airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports of corrosion on fuel clamshell couplings installed in the fuel tank, and a determination that new or more restrictive airworthiness limitations are necessary. This AD requires removing and replacing the fuel clamshell couplings on certain airplanes, and revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products.
For Model CL-600-2B19 airplanes: Within 6,600 flight hours or 36 months, whichever occurs first after the effective date of this AD, remove and replace the fuel clamshell couplings, in accordance with Section 2.B. of the Accomplishment Instructions of MHI RJ Service Bulletin 601R-28-068, Revision A, dated December 21, 2020.
For Model CL-600-2B19 airplanes: Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in paragraphs (h)(1) and (2) of this AD into Supplement 4—FAA Fuel System Limitations of Part 2, Airworthiness Requirements, of the MHI RJ Maintenance Requirements Manual (MRM).
(1) Critical Design Configuration Control Limitation (CDCCL) Item as specified in MHI RJ Temporary Revision (TR) 2S4-002, dated September 1, 2021.
(2) Fuel System Limitation Task 28-23-00-605 as specified in MHI RJ TR 2S4-003, dated September 1, 2021.
For Model CL-600-2C10 and CL-600-2C11 airplanes; Model CL-600-2D15 and CL-600-2D24 airplanes, serial numbers 15001 through 15494 inclusive; and Model CL-600-2E25 airplanes: Within 8,800 flight hours or 48 months, whichever occurs first after the effective date of this AD, replace the fuel clamshell couplings, in accordance with Section 2.B. of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-28-041, Revision B, dated January 27, 2021.
For Model CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25 airplanes: Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in paragraphs (j)(1) and (2) of this AD.
(1) Fuel System Limitation Task 28-21-15-601 as specified in [MHI RJ] CRJ Series Regional Jet TR ALI-0741, dated October 13, 2020; and Description Applicability for Airworthiness Limitation Task 28-21-15-601 as amended by [MHI RJ] CRJ700/900/1000 Series Regional Jet TR ALI-0751, dated April 8, 2021; in Section 4-28 of Part 2, Airworthiness Requirements, of the MHI RJ MRM.
(2) CDCCL Item as specified in [MHI RJ] CRJ Series Regional Jet TR ALI-0740, dated October 13, 2020, in Section 5-00 of Part 2, Airworthiness Requirements, of the MHI RJ MRM.
After the existing maintenance or inspection program has been revised as required by paragraphs (h) and (j) of this AD, no alternative actions (e.g., inspections), intervals, or CDCCLs may be used unless the actions, intervals, and CDCCLs are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (m)(1) of this AD.
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
