Inspecting the wing lift struts for corrosion and forks for cracks, and making necessary repairs.
Rear and forward supports of both horizontal stabilizer modification.
Replacing Facet induction air filters (manufactured by the Purolator Products Company) due to cracking, splitting, crumbling, and deterioration.
Inspection of the wing forward spar fuselage attachment assembly for cracks or corrosion, and replacing or repairing any cracked or corroded part.
Inspection of forward wing spar caps to detect cracks or other damage.
How to prevent engine stoppage or malfunction due to the accumulation of water or other contaminants in the fuel system.
Installation of placard P/N 81090-02, which provides information for operation of the parking brake, on the pilot’s instrument panel.
How to prevent failure of the lower fuselage attachment tab which connects the lower horizontal stabilizer brace wire to the fuselage.
How to detect cracks or other damage in the forward wing spar cap.
Inspection of fuel tank inlet rubber seal and modification of fuel caps to prevent inadequate fuel venting.
Steps to prevent weakening of the fuselage steel tubing cluster in the area of the rear wing spar attachment due to corrosion of the fuselage tubing.
Steps to preclude opening of the cabin door in flight.
Inspect the flap control system to ensure that six flap control pulley guards are properly installed.
Steps to prevent possible fuel unbalance and fuel line chafing.
How to prevent sudden failure of the fabric at the top of the windshield where the fabric attaches to the channel.
How to detect cracks in the forward wing spar.
Inspection of the left and right upper longerons for cracks using the dye penetrant technique.
Attach an operating limitation placard to the instrument panel near the throttle in full view of the pilot.
Attach an operating limitation placard to the instrument panel near the throttle control in full view of the pilot.
Prevention of potential in-flight fire due to fuel line failure.