Prevention of possible failure of the engine mount.
How to determine if the lower longerons are made from 1025 steel or the approved 4130 steel. To be accomplished before further flight.
Inspection of the engine exhaust muffler and shroud assembly, carburetor heat shroud and air duct, support braces, clamps and brackets, exhaust stacks and manifolds.
To forestall the possibility of engine fuel starvation during takeoff operations, install a placard on the right fuel quantity gauge.
Inspect to prevent further failures of engine exhaust system components.
Steps to prevent loss of the elevator control system as a result of worn clevis bolts.
How to correct air leaks, which permit entrance of engine fumes into the cockpit, in the area of the fuselage right main landing gear fittings.
Inspection, cleaning and replacement of upper bearing in the oleo strut.
Steps to preclude weld separations on the end of the landing gear shock strut assembly.
Replace the aluminum front spar wing-to-fuselage attachment fittings with steel forgings.
Steps to preclude failure of the rudder cable attachment fitting lug at the weld on rudder pedals.
Steps to preclude loss of control of the airplane as a result of failed nicopress sleeves in the control system.
Several accidents have occurred involving engine fuel starvation attributed to a lack of detent action in the fuel selector valve.
Installation of safety belt extension on the front seat belt to eliminate deterioration due to rear seat heater damage and chafing.
Steps to prevent the possibility of a catastrophic accident in the event of tail brace wire failure.
Reworking the vents in fuel tank caps to comply with AD 56-26-02.
Short circuit caused by a faulty cigar lighter element possibly resulting in blowing of the master fuses.
Inspection of aileron hinge reinforcing brackets to determine the type of material. All aluminum brackets are to be removed and replaced with steel brackets.
Inspection and reworking the turnbuckles to preclude the possibility of fork end failures in the control system.
Eliminate combustible material and possible ignition sources from the area aft of the firewall, underneath the forward cabin floor, to preclude possibility of inflight fires.