Airworthiness directives › 2022-18-15
AD 2022-18-15 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
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. The FAA is issuing this AD to address corroded fuel clamshell couplings in the fuel tank, which, if not removed and replaced, could reduce the ability of the fuel coupling to conduct lightning current and possibly lead to arcing and subsequent fuel tank ignition in the event of a lightning strike.
Affected ADs
None.
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