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In cooperation with the CAA program of increasing the safety factor of cabin interior in the event of crash, we have modified the attachment of the control wheel to its shaft.
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How to inspect the stack "Y" junction for evidence of failure or deterioration.
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Listed airplanes may contain a control column shaft, P/N 415-52129, which is defective at its lower bearing fitting.
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Preventing elevator flutter in the event the elevator trim tab control wire fails by installing elevator trim tab stop and spring.
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Covers the tightening of the propeller hub bolts on the Continental hub used with the Continental C-75 and C-85 engines.
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To facilitate the inspection of Piper airplanes in the field, the Service Department has made up 100, 500 and 1000 hour inspection forms for Piper PA-18, PA-18A, PA-22, PA-23 and PA-24 models.
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These inspection notes are issued as a recommended check list to assist owners, operators, and maintenance personnel in keeping their Piper airplanes in an airworthy condition.
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To reduce the amount of oil passing through the breather tube and exhausting on the under-side of the aircraft, Continental Motors Corporation has a newly designed engine fitting which extends further into the engine case.
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Reference: 45.11 (b) Removal of data plate.
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Downloadable paint scheme sheets for Piper J-4. Available for 1939, 1940 and 1941 models.