Summary
The FAA proposes to supersede Airworthiness Directive (AD) 75- 16-20, which applies to all Mitsubishi Model MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-30, MU-2B-35, and MU-2B-36 airplanes. AD 75-16-20 requires repetitive inspections of the propeller pitch control (PPC) lever for security and proper rigging. Since the FAA issued AD 75-16-20, the FAA received additional reports of the PPC lever linkage disconnecting at the engine. In addition, Mitsubishi has type certificated additional airplanes that are subject to the unsafe condition. This proposed AD would require modification and repetitive inspections of the PPC lever linkage. The FAA is proposing this AD to address the unsafe condition on these products.