Service Letter No. 258

Part Number Supersedure for External Retaining Ring

  • Publications

August 27, 2013 

To all Lycoming Engine Owners, Operators, and Authorized Lycoming  Distributors

This Service Letter is to advise customers, operators and authorized Lycoming distributors that External  Retaining  Ring P/N  MS16624­37 is superseded by P/N MS16624­2037 External Retaining Ring  (zinc coated).

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