Aeronca, Champion, Citabria, Bellanca

Inspection of front and rear control stick socket castings for cracks at the ears to which the push-pull tube attaches.

Accidents have occurred in model 11AC and S11AC aircraft due to misuse of the fuel transfer system. These accidents have been caused by pilots attempting to transfer fuel while taking off or in a climb attitude.

In order to prevent the seat belt anchorage from failing during crash landings, it has been found necessary to modify the seat installation as follows.

To prevent failure of the rear fuselage-wing attachment fitting, reinforcement is to be accomplished by either of the following methods.

Inspect front and rear control stick socket castings for cracks at the ears to which the push-pull tube attaches.

To eliminate interference and failure of the turnbuckle forks at the attachment points of the two elevator control cables to the horn located on the bottom of the control column, confirm that AN 161-16RS turnbuckle forks have been replaced by AN 160-16S forks.

Remove the tires and inspect the wheel flanges for fatigue cracks.

Inspect the wing leading edge for buckled nose ribs or loose PK screws.

How to inspect the stack "Y" junction for evidence of failure or deterioration.

Replacement of front lift strut wing attachment fittings to prevent failure of lift strut wing fitting due to tie-down loads.

To prevent the oleo strut assembly from separating in flight, replace the fiber piston with aluminum pistons.

Removing the gascolator bowl and cleaning the strainer screen to remove accumulations of water and foreign matter.