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The new Fuel Selector Valve, part number 11383-04, should be used for all service replacements and all new installations on Piper PA-18, PA-20 and PA-22 airplanes equipped with two wing fuel tanks.
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Information concerning the use of safety belts which do not have TSO approval.
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Discussion concerning the useful life of the eight rubber engine support bushings, Lycoming part number 60883.
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The importance of proper maintenance of the carburetor air filter for satisfactory service life of the engine.
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It has been found that the .040" brass safety wire which is being used to safety the propeller hub bolts does not provide a safety that is completely satisfactory.
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Repairs made in the aileron hinge bearing blocks utilizing dural rivets are unauthorized and all dural rivets must be removed and replaced with soft steel round head rivets of appropriate size.
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Update to Service Letter #209.
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To prevent excessive wear of the primer line, resulting in fuel leakage and possible cabin fire, it is recommended that primer lines be clamped and/or re-routed per the sketch included with this letter.
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Information regarding modification of the shimmy dampener to prevent separation between the assembly body and the end plate.
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Concerns about some of the operational conditions which exist with the PA-18A agricultural airplane.