Mooney M20J 201 — Airworthiness Directives

This Special Airworthiness Information Bulletin (SAIB) serves to inform owners, operators, and repair facilities about potential issues with Lycoming engines equipped with TCM Dual Magnetos. Specifically, it highlights the risk of magneto separation from the engine, which can lead to power loss. The bulletin focuses on incidents involving Lycoming IO-360-A1B6D and IO-360-A3B6D engines, particularly in Mooney M20J-201 and Cessna 177RG aircraft. It provides recommendations for inspection and maintenance to mitigate these risks, including checks for wear and proper installation of components. The document emphasizes the importance of adhering to specific guidelines to ensure safety and reliability in aircraft operations.

• Magneto separation can lead to loss of engine power.
• Inspect magneto housing for cracks before installation.
• Use the correct gasket (P/N LW-12681) to prevent installation issues.
• Torque magneto clamp nuts as specified in Lycoming SI No. 1508C.
• Perform regular inspections of the magneto for looseness and wear.