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Corrosion between the aluminum terminal and aluminum wire at the battery positive post, resulting in overheating of the wire due to high electrical resistance.
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Installation of a placard on the Pilot's instrument panel warning against using improper procedures in applying the parking brake.
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Exhaust muffler inspection and modification, Piper Part Number 12433-00, 12433-14, 12232-00.
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Instructions for the installation of an additional support plate to strengthen the attachment mechanism.
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A recent fuel tank collapse was attributed to inadequate venting, caused by obstruction of the cap vent holes installed per Piper Service Bulletin No. 522.
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Reports of collapsed wing mounted fuel tanks due to inadequate venting of the tank.
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Instructions and material to reroute the rudder control cables to prevent cable contact with the adjacent fuselage frame tubes.
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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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Checking fuel selector valve for ease of rotation and instructions for lubricating.
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A recent survey of PA-20 and PA-22 aircraft has revealed that a certain number of these airplanes are operating with the strainer to carburetor flexible fuel line in a deteriorated condition.