Airworthiness directives › 2023-24-03
AD 2023-24-03 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
This AD applies to all MHI RJ Aviation ULC (Type Certificate previously held by Bombardier, Inc.) airplanes identified in paragraphs (c)(1) through (6) of this AD, certificated in any category. (1) Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. (2) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes. (3) Model CL-600-2C11 (Regional Jet Series 550) airplanes. (4) Model CL-600-2D15 (Regional Jet Series 705) airplanes. (5) Model CL-600-2D24 (Regional Jet Series 900) airplanes. (6) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For Model CL-600-2B19 (Regional Jet Series 100 & 440) 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 Bombardier Temporary Revision 2A-75, dated May 28, 2020. The initial compliance time is within 12 months after the effective date of this AD.
Unsafe condition
This AD was prompted by a determination that new or more restrictive aircraft maintenance manual (AMM) tasks and certification maintenance requirement (CMR) tasks are necessary. The FAA is issuing this AD to address a potential dormant failure of the lavatory smoke detector if the self-test switch check is not performed in accordance with the revised AMM or CMR tasks. If these maintenance task changes are not implemented, and in combination with a fire in the lavatory, this may lead to a delay in the reaction time to address smoke/fire in the lavatory.
Affected ADs
None.
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