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Remove the fairing at the wing root of each wing and inspect the wing root area for interference between the forward fuel line and the aileron cable and/or aileron pulley.
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Due to recurring failures of the control cables, all cables should be carefully inspected at each section which passes either over a pulley or through a fairlead.
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Determine if the attachment of the rudder control arm to the torque tube has been reinforced by a steel strap.
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Replace the adjustment screw in the lower end of the control stick horn, with an AN 520-10-44 screw in order to prevent interference with the lower fuselage skin.
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How to prevent engine stoppage or malfunction due to the accumulation of water or other contaminants in the fuel system.
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How to prevent failure of the lower fuselage attachment tab which connects the lower horizontal stabilizer brace wire to the fuselage.
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Installation of placard P/N 81090-02, which provides information for operation of the parking brake, on the pilot’s instrument panel.
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Rear and forward supports of both horizontal stabilizer modification.
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Replacing Facet induction air filters (manufactured by the Purolator Products Company) due to cracking, splitting, crumbling, and deterioration.
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Inspection of the wing forward spar fuselage attachment assembly for cracks or corrosion, and replacing or repairing any cracked or corroded part.