Airworthiness directives › 2024-13-07
AD 2024-13-07 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
This AD applies to MHI RJ Aviation ULC (Type Certificate previously held by Bombardier, Inc.) Model CL-600-2D15 (Regional Jet Series 705) and Model CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, as identified in Transport Canada AD CF-2023-76, dated November 28, 2023 (Transport Canada AD CF-2023-76).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2023-76.
Unsafe condition
This AD was prompted by a notice from a supplier reporting that torque wrenches used to install the air driven generator (ADG) downlock cam nut were out of calibration, which resulted in a higher torque level setting than required during the initial production installation of the affected cam nut. The FAA is issuing this AD to address this over-torque condition that could cause the screw and cam to fail. The unsafe condition, if not addressed, could result in the loss of the ADG downlock mechanism functionality on aircraft touchdown which eliminates a critical power source for the aircraft, leaving the flightcrew with the minimum flightdeck displays and difficulty controlling the aircraft.
Affected ADs
None.
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