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Failure of part number 69650 piston pins, caused by transverse grinding or heat cracks which occurred during manufacture of the piston pin.
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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.
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How to determine if the lower longerons are made from 1025 steel or the approved 4130 steel. To be accomplished before further flight.
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Describes a method of repair for aluminum fuel tanks, seam leakage or seepage.
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Procedure for visual inspection of outer wing panel structure for evidence of corrosion.
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Instructions for correcting an incorrectly installed pointer on the fuel selector valve.
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Revision to fuel gauge number 10837 to improve quantity visibility.
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Reworking the vents in fuel tank caps to comply with AD 56-26-02.
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Modification and reinforcement of landing gear to prevent cracks in the leading edge of the streamlined tube where it joins the inboard end of the axle.
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How to remove the fin for spar inspection, and required replacement parts if failure exists.