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Sat, Jan 23, 2021

AD: M7 Aerospace LLC Airplanes

AD 2021-01-02 Requires Repetitively Inspecting The PPC For Proper Torque

The FAA is adopting a new airworthiness directive (AD) for M7 Aerospace LLC Models SA26-AT and SA26-T airplanes. This AD was prompted by reports of the airplane power lever linkage detaching from the TPE331 engine propeller pitch  control (PPC) shaft.

This AD requires repetitively inspecting the PPC for proper torque and making any necessary corrections until the replacement of the PPC assembly and the installation of a secondary retention feature (safety wire) are done. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective February 26, 2021.

Supplementary Information: The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to M7 Aerospace LLC Models SA26-AT and SA26-T airplanes. The NPRM published in the Federal Register on October 14, 2020 (85 FR 64993). The NPRM was prompted by reports of the airplane power lever linkage detaching from the TPE331 engine PPC shaft. In the NPRM, the FAA proposed to require repetitively inspecting the PPC for proper torque and making any necessary corrections until the replacement of the PPC assembly and the installation of a secondary retention feature (safety wire) are done. The FAA is issuing this AD to prevent uncommanded change to the engine power settings with consequent loss of control.

FMI: www.regulations.gov

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