AIRWORTHINESS DIRECTIVE

54-05-02 SENSENICH:

  • Applies to All Model M76AM-2 Propellers Installed on Lycoming Models -0-290-D and 0-290-D2 Engines.

  • Compliance required by March 15, 1954, and at intervals not to exceed each 25 hours operation thereafter.

  • To eliminate the possibility of blade tip failures on Model M76AM-2 propellers installed on the above Lycoming engines, all nicks, gouges and scratches within 8 inches of the blade tip should be removed. Care should be taken to be sure all trace of the damage is removed. Minor damaged areas may be removed by using coarse emery cloth. The repaired area should then be polished with fine emery cloth. Rebalancing is not necessary when repairing minor damage areas as defined in Civil Aeronautics Manual 18 (18.30-15)

(Sensenich Service Bulletin No. R-2 covers this same subject)

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