Installation of a new gasket with more cushioning properties to eliminate breakage of the glass fuel strainer bowl.
Instructions on safety wiring the cap screws currently being used to attach the carburetor air box to the carburetor.
Installing an additional tailpipe brace to eliminate possible cracking of the muffler around the tailpipe outlet.
Adding reinforcement to prevent landing gears cracking and breaking at the upper end of the tie strap.
Replacing the glass fuel strainer bowl with an aluminum bowl.
Relocating the voltage regulator due to the excessive heat at the lower right side of the firewall.
Progressive failures of weld points in the landing gear.
Possibility of a short circuit occurring between the battery terminal bases and the battery box.
Possibility of cowl attachments loosening and allowing the nose cowl to bear against the starter ring-gear casting near the propeller hub; in some cases, actually severing the casting.
Possibility that the shielding on the magneto ground wire may come in contact with the terminal at the magneto attachment, causing grounding of the magneto and resulting in engine failure.
Summary of service difficulties experienced with the electrical system in the Model PA-12 and recommendations as to how to remedy these difficulties.
Loose end fitting on the flexible fuel line connecting the fuel strainer to the carburetor.
Deterioration of the insulation on the battery hold-down, allowing the bracket to contact the battery terminals and cause a short circuit.
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.
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.
Inspection to ascertain that the flattened tube end fitting at each end of the connector tube is riveted in place as shown in sketch.
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.
How to fix difficulties with the fabric where it attaches to the fuselage under the windshield top and/or directly over the rear edge of the windshield top attachment channel.
Reported cases of failure of a tail brace wire (10074-02 or 10074-03) on the above listed airplanes.
Reports of collapsed wing mounted fuel tanks due to inadequate venting of the tank.