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As a precaution against possible cracking of the sliding window, at the knob, we recommend the following correction on airplanes in the above category.
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The following rework is to be accomplished by not later than the next periodic inspection to eliminate the possibility of a fuel line vapor lock occurring.
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The re-routing of the oil breather line will empty oil vapors almost directly to the outside of the airplane, helping to eliminate an excessively dirty engine compartment.
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Subject: Typical and maximum number of exposed strut threads as permitted for rigging on Piper aircraft. Applicability: Piper J-3, J-4, J-5, and PA-11 through PA-22 Download PDF: Lift-Strut-Fork-Extension.pdf Piper Strut Thread (Typical ...
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Rework to eliminate the possibility of the windshield coming out of its top retaining channel.
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The brake pedal arm has been redesigned as a result of reported failures on this part in the field.
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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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Replacing the original muffler on the serial numbers listed above with a new muffler.
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Installation of insulators inside the battery box cover over the battery terminals to positively prevent a metallic contact between the wing nuts or terminals and cover.
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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.