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Due to the possibility of a defective fitting on the upper end of the control column shaft in the aileron control system, the system should be tested to a load of 94 pounds.
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Replacing the original muffler on the serial numbers listed above with a new muffler.
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Extreme surface corrosion has been found to exist inside the fuselage spar carry through structures of Luscombe Series 8 aircraft, particularly in those airplanes located near coastal areas.
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Luscombe equipped with carburetor engines and fuselage fuel tanks without appropriate modifications to the fuel system may experience engine failure during takeoff and climb under low fuel conditions.
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Inspect for crushing of the stabilizer front spar and the aluminum alloy reinforcing spacers.
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Instructions to provide an alternate source of fuel tank venting in case of fuel tank vent obstruction by foreign material and/or sticking of the fuel vent valve.
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Steps to prevent the possible loss of elevator trim control.
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How to detect cracks in the muffler assembly in Cessna model airplanes incorporating Piper Muffler Assembly P/N 10308-00 with the installation of a Lycoming engine.
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Prevent failure of the fuel line fittings or the gascolator due to the current airplane design configuration. Such failure could result in a lack of fuel to the engine with consequent loss of control of the airplane.
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Fatigue failures have continued to occur in the rudder main rib where the control horn is attached after installation of reinforcement plates.