Airworthiness directives › 2025-13-04
AD 2025-13-04 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 (5) of this AD, certificated in any category. (1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes. (2) Model CL-600-2C11 (Regional Jet Series 550) airplanes. (3) Model CL-600-2D15 (Regional Jet Series 705) airplanes. (4) Model CL-600-2D24 (Regional Jet Series 900) airplanes. (5) Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraphs (h) and (i) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2024-25, dated June 28, 2024 (Transport Canada AD CF-2024-25).
Unsafe condition
This AD was prompted by a report of an in-service event where an engine indicating and crew alerting system STAB TRIM Caution message was posted, and subsequent repair found prematurely worn teeth on a rubber bull gear (RBG) wheel in the horizontal stabilizer trim actuator. The FAA is issuing this AD to address premature wear of the RBG wheel teeth. The unsafe condition, if not addressed, could result in a failure of the horizontal stabilizer trim system.
Affected ADs
None.
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