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Inspection to ascertain that the flattened tube end fitting at each end of the connector tube is riveted in place as shown in sketch.
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Rework to eliminate the possibility of the windshield coming out of its top retaining channel.
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Reports of cracks in the cast aluminum aileron bellcranks due to excessively tightening of the bolt which attaches the aileron push rod to the bellcrank.
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Proper maintenance and inspection of front and rear seat backs to prevent failure due to deformations in seat frames.
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Reports of cracks occurring in the aileron hinge bracket to false spar fittings at the bend between the channel port and the flat portion of the fitting.
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Failure of the rear flap pulley bracket probably due to insufficient weld area in conjunction with operation of flaps at excessive speeds.
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Deterioration of the insulation on the battery hold-down, allowing the bracket to contact the battery terminals and cause a short circuit.
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Loose end fitting on the flexible fuel line connecting the fuel strainer to the carburetor.
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Replacing rubber stop discs with leather discs at the next periodic inspection.
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Summary of service difficulties experienced with the electrical system in the Model PA-12 and recommendations as to how to remedy these difficulties.