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Lycoming Releases Service Instruction 1583 - Front Expansion Plug Replacement

Lycoming Releases Service Instruction 1583 - Front Expansion Plug Replacement

Download a copy of SI1583 

Please refer to Lycoming's Technical Support Team for the most ensure the most current guidance.

Lycoming's Service Instruction 1583 provides detailed instruction for the replacement of the front expansion plug for engines without a model-specific engine maintenance manual. Engines with a model specific engine maintenance manual will have this information in the published engine maintenance manual. 

Parts/Supplies Needed

Crankshaft Welch Plug Driver - P/N 64681

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