Airworthiness Directive · Amendment 39-21377 · Landing gear
MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
This AD applies to MHI RJ Aviation ULC (type certificate previously held by Bombardier, Inc.) Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category, serial numbers 7003 through 8999 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. This AD was prompted by evidence that a revised structural life limit of some components of the nose landing gear (NLG) and/or main landing gear (MLG) was not implemented during repair. This AD requires verifying that the affected components are installed on the airplane, revising the structural life limits in the existing structural deviation inspection requirements (SDIR) airplane document, and replacing affected components if necessary. The FAA is issuing this AD to address the unsafe condition on these products.
Within 6 months from the effective date of this AD: Verify the airplane or technical records to determine if an NLG or MLG component listed in Table 1 or Table 2 of Bombardier Service Bulletin 601R-32-112, dated November 11, 2019, is installed on the airplane. If this verification determines that an affected component listed in Table 1 or Table 2 of Bombardier Service Bulletin 601R-32-112, dated November 11, 2019, is installed on the airplane, perform the actions specified in paragraph (h) or (i) of this AD, as applicable.
If the total flight cycles of the component is less than the revised SDIR life limit identified in figure 1 to paragraph (h) of this AD minus 2,000 flight cycles: Within 12 months after completing the actions specified in paragraph (g) of this AD, incorporate the applicable revised life limit of the affected component into the existing SDIR airplane document as specified in figure 1 to paragraph (h) of this AD.
If the total flight cycles of the component is equal to or more than the applicable revised SDIR life limit specified in figure 1 to paragraph (h) of this AD minus 2,000 flight cycles: Within 12 months or 2,000 flight cycles, whichever occurs first, after completing the actions specified in paragraph (g) of this AD, replace the affected component with a serviceable component.
