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A kit is now available to provide replacement of the standard PA-12 Carburetor Air Box with a Ram-type Box which improves the efficiency of the engine operation and a higher rate of climb.
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Supplement to Ercoupe Service Bulletin No. 13 Change of Aileron Control Stop.
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Failures, occurring as cracks in the center section belly skin at the rearmost rivet attachment in the center section belly skin outer stiffeners (415-13056 L/R), have been reported.
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Recommendations to prevent motor mount failures.
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Installing newly designed tail brace wire nipples to avoid fatigue failures.
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It has been found that the "Cub" becomes quite noticeably nose heavy with full load and power off condition when the space between the wing and the center section is left uncovered.
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General specifications of the Piper J-3 Cub Trainer (commercial models).
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Instructions to inspect the fuel tank filler caps for presence of a vent hole in the cap dome.
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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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Download PDF lists of various Attach Hardware Lists (Gear, Jury Strut, Lift Strut, Shock Strut/Cabane Vee, Tailwheel Springs, and Wing) for Piper PA-11.