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Reports of the wing tank fuel shut off valve, located inline prior to the fuel pump, being left in the “Closed” position during engine run-up and flight, resulting in engine ceasing to function properly upon fuel starvation.
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There have been field reports of severe corrosion in the outer wing panel structure of several aircraft. The most effective means of preventing corrosion damage is early identification and correction.
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Reports have been received indicating overheating of cylinder heads. To provide continuous indication of engine operating temperatures accomplish the following.
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Certain combinations of atmospheric conditions, aircraft attitudes, fuel levels and/or normal flight maneuvers, may result in a condition where fuel starvation can occur.
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To provide tail position light visibility for compliance with CAR 03. 538.
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In some instances, fuel has been observed flowing during flight from the vented fuel-filler caps. To preclude this condition, accomplish the following instructions.
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It is recommended that within the next twenty-five hours the heat muff be removed and the welded areas around the stack junctions and at the cylinder attach flange be closely inspected.
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The purpose of this bulletin is to eliminate the possibilities of a rudder bellcrank seizure caused by the bakelite bushing that has expanded due to moisture within the bushing.
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To eliminate the possibilities of main gear tire wear due to misalignment, the following methods may be used for checking and correction.
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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.